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-crafted/mapsum4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 12:06:12,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 12:06:12,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 12:06:13,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 12:06:13,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 12:06:13,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 12:06:13,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 12:06:13,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 12:06:13,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 12:06:13,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 12:06:13,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 12:06:13,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 12:06:13,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 12:06:13,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 12:06:13,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 12:06:13,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 12:06:13,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 12:06:13,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 12:06:13,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 12:06:13,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 12:06:13,072 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 12:06:13,095 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 12:06:13,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 12:06:13,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 12:06:13,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 12:06:13,098 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 12:06:13,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 12:06:13,099 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 12:06:13,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 12:06:13,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 12:06:13,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 12:06:13,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 12:06:13,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 12:06:13,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 12:06:13,102 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 12:06:13,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 12:06:13,102 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 12:06:13,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 12:06:13,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 12:06:13,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 12:06:13,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 12:06:13,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 12:06:13,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:06:13,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 12:06:13,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 12:06:13,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 12:06:13,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 12:06:13,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 12:06:13,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 12:06:13,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 12:06:13,139 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 12:06:13,159 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 12:06:13,164 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 12:06:13,166 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 12:06:13,166 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 12:06:13,167 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum4.i [2019-09-07 12:06:13,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a741cca1e/0e96f264f35b49b8aee6b8db79358d99/FLAGecc14ba69 [2019-09-07 12:06:13,706 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 12:06:13,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum4.i [2019-09-07 12:06:13,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a741cca1e/0e96f264f35b49b8aee6b8db79358d99/FLAGecc14ba69 [2019-09-07 12:06:14,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a741cca1e/0e96f264f35b49b8aee6b8db79358d99 [2019-09-07 12:06:14,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 12:06:14,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 12:06:14,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 12:06:14,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 12:06:14,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 12:06:14,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:06:14" (1/1) ... [2019-09-07 12:06:14,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77257550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14, skipping insertion in model container [2019-09-07 12:06:14,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:06:14" (1/1) ... [2019-09-07 12:06:14,083 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 12:06:14,101 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 12:06:14,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:06:14,290 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 12:06:14,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:06:14,330 INFO L192 MainTranslator]: Completed translation [2019-09-07 12:06:14,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14 WrapperNode [2019-09-07 12:06:14,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 12:06:14,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 12:06:14,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 12:06:14,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 12:06:14,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14" (1/1) ... [2019-09-07 12:06:14,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14" (1/1) ... [2019-09-07 12:06:14,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14" (1/1) ... [2019-09-07 12:06:14,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14" (1/1) ... [2019-09-07 12:06:14,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14" (1/1) ... [2019-09-07 12:06:14,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14" (1/1) ... [2019-09-07 12:06:14,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14" (1/1) ... [2019-09-07 12:06:14,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 12:06:14,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 12:06:14,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 12:06:14,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 12:06:14,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14" (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 12:06:14,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 12:06:14,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 12:06:14,522 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2019-09-07 12:06:14,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 12:06:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 12:06:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 12:06:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2019-09-07 12:06:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 12:06:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 12:06:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 12:06:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 12:06:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 12:06:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 12:06:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 12:06:14,828 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 12:06:14,829 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 12:06:14,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:06:14 BoogieIcfgContainer [2019-09-07 12:06:14,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 12:06:14,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 12:06:14,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 12:06:14,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 12:06:14,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 12:06:14" (1/3) ... [2019-09-07 12:06:14,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecb7cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:06:14, skipping insertion in model container [2019-09-07 12:06:14,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:06:14" (2/3) ... [2019-09-07 12:06:14,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecb7cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:06:14, skipping insertion in model container [2019-09-07 12:06:14,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:06:14" (3/3) ... [2019-09-07 12:06:14,842 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum4.i [2019-09-07 12:06:14,850 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 12:06:14,857 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 12:06:14,873 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 12:06:14,904 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 12:06:14,905 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 12:06:14,905 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 12:06:14,905 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 12:06:14,905 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 12:06:14,905 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 12:06:14,905 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 12:06:14,906 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 12:06:14,906 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 12:06:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-09-07 12:06:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 12:06:14,929 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:14,930 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:14,932 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:14,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-09-07 12:06:14,939 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:14,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:14,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:14,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:14,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 12:06:15,111 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:06:15,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 12:06:15,116 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 12:06:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 12:06:15,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:06:15,131 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-09-07 12:06:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:15,155 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-09-07 12:06:15,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 12:06:15,156 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-07 12:06:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:15,164 INFO L225 Difference]: With dead ends: 54 [2019-09-07 12:06:15,164 INFO L226 Difference]: Without dead ends: 26 [2019-09-07 12:06:15,168 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:06:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-07 12:06:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-07 12:06:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 12:06:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-07 12:06:15,212 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-09-07 12:06:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:15,213 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-07 12:06:15,213 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 12:06:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-07 12:06:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 12:06:15,216 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:15,216 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:15,216 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:15,217 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-09-07 12:06:15,217 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:15,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:15,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:15,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 12:06:15,291 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:06:15,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:06:15,293 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:06:15,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:06:15,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:06:15,294 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-09-07 12:06:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:15,322 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-07 12:06:15,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:06:15,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-07 12:06:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:15,325 INFO L225 Difference]: With dead ends: 46 [2019-09-07 12:06:15,325 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 12:06:15,326 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 12:06:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 12:06:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-07 12:06:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 12:06:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-07 12:06:15,334 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-09-07 12:06:15,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:15,335 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-07 12:06:15,335 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:06:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-07 12:06:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 12:06:15,337 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:15,337 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:15,337 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-09-07 12:06:15,338 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:15,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:15,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:15,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 12:06:15,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:15,404 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 12:06:15,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:15,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 12:06:15,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:06:15,547 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:06:15,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-07 12:06:15,548 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:06:15,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:06:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:06:15,549 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-09-07 12:06:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:15,587 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-09-07 12:06:15,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:06:15,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-07 12:06:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:15,590 INFO L225 Difference]: With dead ends: 46 [2019-09-07 12:06:15,590 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 12:06:15,591 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:06:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 12:06:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-07 12:06:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 12:06:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-07 12:06:15,599 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-09-07 12:06:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:15,600 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-07 12:06:15,600 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:06:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-07 12:06:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-07 12:06:15,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:15,602 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:15,602 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:15,602 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-09-07 12:06:15,603 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:15,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:15,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:15,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:06:15,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:06:15,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:06:15,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:06:15,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:06:15,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:06:15,738 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-09-07 12:06:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:15,759 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-07 12:06:15,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:06:15,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-09-07 12:06:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:15,763 INFO L225 Difference]: With dead ends: 43 [2019-09-07 12:06:15,763 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 12:06:15,764 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 12:06:15,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 12:06:15,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-07 12:06:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 12:06:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-07 12:06:15,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-09-07 12:06:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:15,773 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-07 12:06:15,773 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:06:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-07 12:06:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 12:06:15,775 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:15,775 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:15,775 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:15,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-09-07 12:06:15,776 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:15,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:15,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:15,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:06:15,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:15,861 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:15,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:15,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:06:15,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Stream closed [2019-09-07 12:06:15,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:15,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 12:06:15,982 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:06:15,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:06:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:06:15,983 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-09-07 12:06:16,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:16,017 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-09-07 12:06:16,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:06:16,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-09-07 12:06:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:16,019 INFO L225 Difference]: With dead ends: 52 [2019-09-07 12:06:16,019 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 12:06:16,020 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 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 12:06:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 12:06:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-07 12:06:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 12:06:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-07 12:06:16,026 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 42 [2019-09-07 12:06:16,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:16,026 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-07 12:06:16,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:06:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-07 12:06:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-07 12:06:16,028 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:16,029 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:16,029 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:16,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1311885621, now seen corresponding path program 2 times [2019-09-07 12:06:16,030 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:16,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:16,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:16,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:06:16,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:16,129 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 12:06:16,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:16,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:06:16,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:16,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:06:16,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:06:16,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:16,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 12:06:16,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:06:16,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:06:16,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:06:16,245 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2019-09-07 12:06:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:16,294 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-09-07 12:06:16,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:06:16,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-09-07 12:06:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:16,300 INFO L225 Difference]: With dead ends: 54 [2019-09-07 12:06:16,300 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 12:06:16,301 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 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 12:06:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 12:06:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-07 12:06:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-07 12:06:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-07 12:06:16,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 44 [2019-09-07 12:06:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:16,314 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-07 12:06:16,315 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:06:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-07 12:06:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 12:06:16,317 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:16,317 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:16,317 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:16,318 INFO L82 PathProgramCache]: Analyzing trace with hash 525258797, now seen corresponding path program 3 times [2019-09-07 12:06:16,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:16,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:16,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:16,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-09-07 12:06:16,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:16,454 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 12:06:16,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:16,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-07 12:06:16,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:16,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:06:16,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-07 12:06:16,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:16,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-09-07 12:06:16,552 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:06:16,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:06:16,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:06:16,553 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2019-09-07 12:06:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:16,608 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-09-07 12:06:16,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:06:16,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-09-07 12:06:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:16,610 INFO L225 Difference]: With dead ends: 58 [2019-09-07 12:06:16,610 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 12:06:16,611 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:06:16,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 12:06:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-07 12:06:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 12:06:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-07 12:06:16,617 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 46 [2019-09-07 12:06:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:16,618 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-07 12:06:16,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:06:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-07 12:06:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-07 12:06:16,619 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:16,619 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:16,620 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:16,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1887809705, now seen corresponding path program 4 times [2019-09-07 12:06:16,620 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:16,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:16,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:16,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-07 12:06:16,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:16,709 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 12:06:16,730 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:06:16,775 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:06:16,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:16,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:06:16,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-07 12:06:16,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:16,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 12:06:16,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 12:06:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 12:06:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:06:16,818 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2019-09-07 12:06:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:16,854 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2019-09-07 12:06:16,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:06:16,856 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-09-07 12:06:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:16,857 INFO L225 Difference]: With dead ends: 64 [2019-09-07 12:06:16,857 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 12:06:16,858 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 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 12:06:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 12:06:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-07 12:06:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 12:06:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-07 12:06:16,866 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 54 [2019-09-07 12:06:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:16,867 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-07 12:06:16,867 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 12:06:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-07 12:06:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 12:06:16,873 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:16,873 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:16,874 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:16,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 5 times [2019-09-07 12:06:16,874 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:16,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:16,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:16,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-07 12:06:16,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:16,996 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 12:06:17,009 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:06:17,071 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 12:06:17,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:17,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:06:17,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:06:17,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:17,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 12:06:17,116 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 12:06:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 12:06:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:06:17,117 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2019-09-07 12:06:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:17,184 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2019-09-07 12:06:17,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 12:06:17,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-09-07 12:06:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:17,187 INFO L225 Difference]: With dead ends: 68 [2019-09-07 12:06:17,187 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 12:06:17,189 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:06:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 12:06:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-09-07 12:06:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 12:06:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-07 12:06:17,195 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 56 [2019-09-07 12:06:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:17,196 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-07 12:06:17,196 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 12:06:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-07 12:06:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-07 12:06:17,197 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:17,198 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:17,198 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 546662663, now seen corresponding path program 6 times [2019-09-07 12:06:17,199 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:17,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:17,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:17,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:17,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-09-07 12:06:17,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:17,314 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 12:06:17,337 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:06:17,390 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 12:06:17,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:17,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:06:17,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-09-07 12:06:17,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:17,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-09-07 12:06:17,460 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 12:06:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 12:06:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:06:17,461 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 11 states. [2019-09-07 12:06:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:17,524 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-09-07 12:06:17,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 12:06:17,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-09-07 12:06:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:17,527 INFO L225 Difference]: With dead ends: 77 [2019-09-07 12:06:17,527 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 12:06:17,528 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:06:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 12:06:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-09-07 12:06:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 12:06:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-07 12:06:17,540 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 64 [2019-09-07 12:06:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:17,540 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-07 12:06:17,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 12:06:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-07 12:06:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 12:06:17,544 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:17,547 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:17,548 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:17,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1619660647, now seen corresponding path program 7 times [2019-09-07 12:06:17,548 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:17,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:17,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:17,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:17,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-09-07 12:06:17,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:17,655 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 12:06:17,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:17,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:06:17,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Stream closed [2019-09-07 12:06:17,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:17,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2019-09-07 12:06:17,849 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 12:06:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 12:06:17,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:06:17,850 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2019-09-07 12:06:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:17,937 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2019-09-07 12:06:17,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 12:06:17,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2019-09-07 12:06:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:17,938 INFO L225 Difference]: With dead ends: 83 [2019-09-07 12:06:17,939 INFO L226 Difference]: Without dead ends: 53 [2019-09-07 12:06:17,940 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:06:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-07 12:06:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-09-07 12:06:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 12:06:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-07 12:06:17,955 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 72 [2019-09-07 12:06:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:17,956 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-07 12:06:17,956 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 12:06:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-07 12:06:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-07 12:06:17,962 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:17,962 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:17,965 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 964116935, now seen corresponding path program 8 times [2019-09-07 12:06:17,966 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:17,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:17,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:17,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:17,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-09-07 12:06:18,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:18,065 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 12:06:18,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:06:18,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:06:18,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:18,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:06:18,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-09-07 12:06:18,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:18,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-09-07 12:06:18,235 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 12:06:18,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 12:06:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 12:06:18,236 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 14 states. [2019-09-07 12:06:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:18,304 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2019-09-07 12:06:18,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 12:06:18,305 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2019-09-07 12:06:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:18,306 INFO L225 Difference]: With dead ends: 89 [2019-09-07 12:06:18,306 INFO L226 Difference]: Without dead ends: 57 [2019-09-07 12:06:18,307 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 12:06:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-07 12:06:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-09-07 12:06:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 12:06:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-09-07 12:06:18,314 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 76 [2019-09-07 12:06:18,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:18,314 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-09-07 12:06:18,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 12:06:18,314 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-09-07 12:06:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 12:06:18,315 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:18,316 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:18,316 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1800824025, now seen corresponding path program 9 times [2019-09-07 12:06:18,317 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:18,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:18,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:18,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:18,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-09-07 12:06:18,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:18,416 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 12:06:18,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:06:18,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-07 12:06:18,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:18,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 12:06:18,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-07 12:06:18,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:18,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-09-07 12:06:18,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 12:06:18,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 12:06:18,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:06:18,543 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 13 states. [2019-09-07 12:06:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:18,608 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-09-07 12:06:18,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 12:06:18,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2019-09-07 12:06:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:18,610 INFO L225 Difference]: With dead ends: 94 [2019-09-07 12:06:18,610 INFO L226 Difference]: Without dead ends: 61 [2019-09-07 12:06:18,612 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:06:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-07 12:06:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-09-07 12:06:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-07 12:06:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-09-07 12:06:18,627 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 80 [2019-09-07 12:06:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:18,628 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-09-07 12:06:18,628 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 12:06:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-09-07 12:06:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-07 12:06:18,629 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:18,630 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:18,630 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:18,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1091736157, now seen corresponding path program 10 times [2019-09-07 12:06:18,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:18,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:18,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:18,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:18,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-09-07 12:06:18,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:18,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:18,767 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:06:18,817 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:06:18,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:18,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:06:18,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 128 proven. 25 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-09-07 12:06:18,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:18,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-09-07 12:06:18,916 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 12:06:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 12:06:18,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:06:18,917 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 16 states. [2019-09-07 12:06:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:18,990 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-09-07 12:06:18,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 12:06:18,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2019-09-07 12:06:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:18,992 INFO L225 Difference]: With dead ends: 103 [2019-09-07 12:06:18,992 INFO L226 Difference]: Without dead ends: 65 [2019-09-07 12:06:18,993 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:06:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-07 12:06:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2019-09-07 12:06:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-07 12:06:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-09-07 12:06:19,008 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 88 [2019-09-07 12:06:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:19,008 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-09-07 12:06:19,008 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 12:06:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-09-07 12:06:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 12:06:19,009 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:19,010 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:19,010 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash 959940099, now seen corresponding path program 11 times [2019-09-07 12:06:19,010 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:19,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:19,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:19,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:19,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2019-09-07 12:06:19,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:19,125 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 12:06:19,140 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:06:19,509 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 12:06:19,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:19,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:06:19,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2019-09-07 12:06:19,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:19,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-07 12:06:19,617 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 12:06:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 12:06:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:06:19,618 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 16 states. [2019-09-07 12:06:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:19,691 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2019-09-07 12:06:19,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 12:06:19,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2019-09-07 12:06:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:19,692 INFO L225 Difference]: With dead ends: 108 [2019-09-07 12:06:19,692 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 12:06:19,693 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:06:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 12:06:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-09-07 12:06:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-07 12:06:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-09-07 12:06:19,698 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 96 [2019-09-07 12:06:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:19,699 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-09-07 12:06:19,699 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 12:06:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-09-07 12:06:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-07 12:06:19,700 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:19,700 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:19,700 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash 754858879, now seen corresponding path program 12 times [2019-09-07 12:06:19,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:19,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:19,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:19,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:19,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-09-07 12:06:19,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:19,811 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) [2019-09-07 12:06:19,831 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:20,086 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-07 12:06:20,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:20,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 12:06:20,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 232 proven. 49 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-07 12:06:20,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:20,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-09-07 12:06:20,212 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 12:06:20,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 12:06:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 12:06:20,213 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 19 states. [2019-09-07 12:06:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:20,310 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2019-09-07 12:06:20,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 12:06:20,311 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-09-07 12:06:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:20,312 INFO L225 Difference]: With dead ends: 117 [2019-09-07 12:06:20,312 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 12:06:20,313 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 12:06:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 12:06:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-09-07 12:06:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-07 12:06:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-09-07 12:06:20,319 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 104 [2019-09-07 12:06:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:20,319 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-09-07 12:06:20,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 12:06:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-09-07 12:06:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-07 12:06:20,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:20,321 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:20,321 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:20,322 INFO L82 PathProgramCache]: Analyzing trace with hash 878320095, now seen corresponding path program 13 times [2019-09-07 12:06:20,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:20,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:20,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:20,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:20,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-09-07 12:06:20,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:20,428 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 12:06:20,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:20,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:06:20,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-09-07 12:06:20,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:20,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-09-07 12:06:20,725 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 12:06:20,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 12:06:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 12:06:20,726 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 20 states. [2019-09-07 12:06:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:20,841 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2019-09-07 12:06:20,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 12:06:20,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 112 [2019-09-07 12:06:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:20,843 INFO L225 Difference]: With dead ends: 123 [2019-09-07 12:06:20,843 INFO L226 Difference]: Without dead ends: 77 [2019-09-07 12:06:20,844 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 12:06:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-07 12:06:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-09-07 12:06:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-07 12:06:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2019-09-07 12:06:20,849 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 112 [2019-09-07 12:06:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:20,850 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2019-09-07 12:06:20,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 12:06:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2019-09-07 12:06:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-07 12:06:20,852 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:20,852 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:20,852 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:20,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:20,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1308312639, now seen corresponding path program 14 times [2019-09-07 12:06:20,853 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:20,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:20,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:20,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:20,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2019-09-07 12:06:20,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:20,994 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 12:06:21,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:06:21,076 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:06:21,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:21,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 12:06:21,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-07 12:06:21,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:21,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-09-07 12:06:21,250 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 12:06:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 12:06:21,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 12:06:21,251 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 22 states. [2019-09-07 12:06:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:21,345 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-09-07 12:06:21,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 12:06:21,346 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2019-09-07 12:06:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:21,347 INFO L225 Difference]: With dead ends: 129 [2019-09-07 12:06:21,348 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 12:06:21,348 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 12:06:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 12:06:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2019-09-07 12:06:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 12:06:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-09-07 12:06:21,356 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 116 [2019-09-07 12:06:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:21,356 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-09-07 12:06:21,356 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 12:06:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-09-07 12:06:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-07 12:06:21,358 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:21,358 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:21,358 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1890019937, now seen corresponding path program 15 times [2019-09-07 12:06:21,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:21,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:21,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:21,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:21,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-09-07 12:06:21,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:21,491 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:06:21,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:06:21,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 12:06:21,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:21,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 12:06:21,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-09-07 12:06:21,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:21,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-09-07 12:06:21,803 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 12:06:21,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 12:06:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 12:06:21,804 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 21 states. [2019-09-07 12:06:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:21,879 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2019-09-07 12:06:21,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 12:06:21,880 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2019-09-07 12:06:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:21,881 INFO L225 Difference]: With dead ends: 134 [2019-09-07 12:06:21,881 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 12:06:21,882 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 12:06:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 12:06:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-09-07 12:06:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-07 12:06:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-09-07 12:06:21,886 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 120 [2019-09-07 12:06:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:21,887 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-09-07 12:06:21,887 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 12:06:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-09-07 12:06:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-07 12:06:21,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:21,888 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 11, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:21,889 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -703058917, now seen corresponding path program 16 times [2019-09-07 12:06:21,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:21,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:21,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:21,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:21,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 12:06:22,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:22,071 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:06:22,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:22,152 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:06:22,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:22,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 12:06:22,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 12:06:22,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:22,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 12:06:22,199 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 12:06:22,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 12:06:22,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 12:06:22,200 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 15 states. [2019-09-07 12:06:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:22,245 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2019-09-07 12:06:22,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 12:06:22,245 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2019-09-07 12:06:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:22,246 INFO L225 Difference]: With dead ends: 140 [2019-09-07 12:06:22,247 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 12:06:22,247 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 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 12:06:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 12:06:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-09-07 12:06:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-07 12:06:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2019-09-07 12:06:22,252 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 128 [2019-09-07 12:06:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:22,252 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2019-09-07 12:06:22,253 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 12:06:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2019-09-07 12:06:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 12:06:22,254 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:22,254 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:22,254 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:22,255 INFO L82 PathProgramCache]: Analyzing trace with hash 965488765, now seen corresponding path program 17 times [2019-09-07 12:06:22,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:22,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:22,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:22,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:22,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2019-09-07 12:06:22,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:22,469 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 12:06:22,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:06:23,026 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 12:06:23,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:23,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:06:23,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 364 proven. 81 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (19)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:06:23,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:23,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-07 12:06:23,201 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 12:06:23,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 12:06:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:06:23,202 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 23 states. [2019-09-07 12:06:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:23,323 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2019-09-07 12:06:23,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 12:06:23,329 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2019-09-07 12:06:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:23,330 INFO L225 Difference]: With dead ends: 144 [2019-09-07 12:06:23,331 INFO L226 Difference]: Without dead ends: 91 [2019-09-07 12:06:23,331 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:06:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-07 12:06:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-09-07 12:06:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-07 12:06:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-09-07 12:06:23,337 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 130 [2019-09-07 12:06:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:23,339 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-09-07 12:06:23,339 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 12:06:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-09-07 12:06:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-07 12:06:23,341 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:23,341 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 12, 12, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:23,341 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:23,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1776408569, now seen corresponding path program 18 times [2019-09-07 12:06:23,342 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:23,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:23,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:23,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:23,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1096 trivial. 0 not checked. [2019-09-07 12:06:23,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:23,556 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) [2019-09-07 12:06:23,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:24,146 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-07 12:06:24,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:24,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 12:06:24,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 448 proven. 100 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2019-09-07 12:06:24,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:24,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2019-09-07 12:06:24,352 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 12:06:24,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 12:06:24,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 12:06:24,353 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 26 states. [2019-09-07 12:06:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:24,450 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2019-09-07 12:06:24,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 12:06:24,452 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 138 [2019-09-07 12:06:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:24,453 INFO L225 Difference]: With dead ends: 153 [2019-09-07 12:06:24,453 INFO L226 Difference]: Without dead ends: 95 [2019-09-07 12:06:24,454 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 12:06:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-07 12:06:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2019-09-07 12:06:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-07 12:06:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-09-07 12:06:24,458 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 138 [2019-09-07 12:06:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:24,459 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-09-07 12:06:24,459 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 12:06:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-09-07 12:06:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-07 12:06:24,461 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:24,461 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 13, 13, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:24,461 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -159648167, now seen corresponding path program 19 times [2019-09-07 12:06:24,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:24,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:24,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:24,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:24,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2019-09-07 12:06:24,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:24,613 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 12:06:24,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:24,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 12:06:24,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1291 trivial. 0 not checked. [2019-09-07 12:06:25,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:25,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2019-09-07 12:06:25,052 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 12:06:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 12:06:25,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:06:25,053 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 28 states. [2019-09-07 12:06:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:25,179 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2019-09-07 12:06:25,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 12:06:25,180 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 146 [2019-09-07 12:06:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:25,181 INFO L225 Difference]: With dead ends: 159 [2019-09-07 12:06:25,181 INFO L226 Difference]: Without dead ends: 99 [2019-09-07 12:06:25,182 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:06:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-07 12:06:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-09-07 12:06:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-07 12:06:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-09-07 12:06:25,188 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 146 [2019-09-07 12:06:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:25,188 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-09-07 12:06:25,188 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 12:06:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-09-07 12:06:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-07 12:06:25,190 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:25,190 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:25,190 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:25,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:25,191 INFO L82 PathProgramCache]: Analyzing trace with hash 920273337, now seen corresponding path program 20 times [2019-09-07 12:06:25,191 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:25,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:25,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:25,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:25,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2019-09-07 12:06:25,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:25,394 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 12:06:25,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:25,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:06:25,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:25,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 12:06:25,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2019-09-07 12:06:25,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:25,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2019-09-07 12:06:25,724 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 12:06:25,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 12:06:25,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 12:06:25,725 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 30 states. [2019-09-07 12:06:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:25,845 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-09-07 12:06:25,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 12:06:25,845 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 150 [2019-09-07 12:06:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:25,846 INFO L225 Difference]: With dead ends: 165 [2019-09-07 12:06:25,847 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 12:06:25,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 12:06:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 12:06:25,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-09-07 12:06:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 12:06:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-09-07 12:06:25,852 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 150 [2019-09-07 12:06:25,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:25,853 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-09-07 12:06:25,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 12:06:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-09-07 12:06:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-07 12:06:25,855 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:25,855 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:25,855 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:25,856 INFO L82 PathProgramCache]: Analyzing trace with hash 606123033, now seen corresponding path program 21 times [2019-09-07 12:06:25,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:25,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:25,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:25,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:25,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-09-07 12:06:26,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:26,050 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:26,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:06:26,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 12:06:26,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:26,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 12:06:26,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 536 proven. 121 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2019-09-07 12:06:26,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:26,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-09-07 12:06:26,617 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 12:06:26,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 12:06:26,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:06:26,618 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 28 states. [2019-09-07 12:06:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:26,741 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2019-09-07 12:06:26,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 12:06:26,742 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2019-09-07 12:06:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:26,743 INFO L225 Difference]: With dead ends: 170 [2019-09-07 12:06:26,743 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 12:06:26,744 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:06:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 12:06:26,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-09-07 12:06:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-07 12:06:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-09-07 12:06:26,749 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 154 [2019-09-07 12:06:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:26,750 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-09-07 12:06:26,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 12:06:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-09-07 12:06:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-07 12:06:26,752 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:26,752 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 15, 15, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:26,752 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1060846741, now seen corresponding path program 22 times [2019-09-07 12:06:26,753 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:26,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:26,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:26,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:26,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1579 trivial. 0 not checked. [2019-09-07 12:06:26,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:26,976 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 12:06:26,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:06:27,067 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:06:27,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:27,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 12:06:27,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 632 proven. 144 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (24)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:06:27,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:27,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2019-09-07 12:06:27,347 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 12:06:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 12:06:27,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:06:27,349 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 31 states. [2019-09-07 12:06:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:27,513 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2019-09-07 12:06:27,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 12:06:27,514 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 162 [2019-09-07 12:06:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:27,515 INFO L225 Difference]: With dead ends: 179 [2019-09-07 12:06:27,515 INFO L226 Difference]: Without dead ends: 111 [2019-09-07 12:06:27,516 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:06:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-07 12:06:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2019-09-07 12:06:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-07 12:06:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-09-07 12:06:27,524 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 162 [2019-09-07 12:06:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:27,524 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-09-07 12:06:27,524 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 12:06:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-09-07 12:06:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-07 12:06:27,527 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:27,527 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 16, 16, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:27,527 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:27,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1948693259, now seen corresponding path program 23 times [2019-09-07 12:06:27,528 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:27,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:27,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:27,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:27,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2019-09-07 12:06:27,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:27,894 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:06:27,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:34,841 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-07 12:06:34,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:34,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 12:06:34,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 732 proven. 169 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2019-09-07 12:06:35,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:35,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2019-09-07 12:06:35,091 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 12:06:35,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 12:06:35,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:06:35,092 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 31 states. [2019-09-07 12:06:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:35,202 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2019-09-07 12:06:35,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 12:06:35,202 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 170 [2019-09-07 12:06:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:35,203 INFO L225 Difference]: With dead ends: 184 [2019-09-07 12:06:35,203 INFO L226 Difference]: Without dead ends: 115 [2019-09-07 12:06:35,204 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:06:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-07 12:06:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-09-07 12:06:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-07 12:06:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-09-07 12:06:35,211 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 170 [2019-09-07 12:06:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:35,211 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-09-07 12:06:35,211 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 12:06:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-09-07 12:06:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-09-07 12:06:35,213 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:35,213 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 16, 16, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:35,213 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:35,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:35,214 INFO L82 PathProgramCache]: Analyzing trace with hash -3950479, now seen corresponding path program 24 times [2019-09-07 12:06:35,214 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:35,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:35,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:35,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:35,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2019-09-07 12:06:35,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:35,475 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:06:35,492 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:36,446 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2019-09-07 12:06:36,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:36,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-07 12:06:36,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 908 proven. 196 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2019-09-07 12:06:36,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:36,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2019-09-07 12:06:36,907 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 12:06:36,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 12:06:36,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:06:36,908 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 38 states. [2019-09-07 12:06:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:37,185 INFO L93 Difference]: Finished difference Result 194 states and 207 transitions. [2019-09-07 12:06:37,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:06:37,186 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2019-09-07 12:06:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:37,187 INFO L225 Difference]: With dead ends: 194 [2019-09-07 12:06:37,187 INFO L226 Difference]: Without dead ends: 120 [2019-09-07 12:06:37,188 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=1200, Unknown=0, NotChecked=0, Total=1560 [2019-09-07 12:06:37,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-07 12:06:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-09-07 12:06:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-09-07 12:06:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2019-09-07 12:06:37,194 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 178 [2019-09-07 12:06:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:37,194 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2019-09-07 12:06:37,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 12:06:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2019-09-07 12:06:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-09-07 12:06:37,201 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:37,201 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 18, 18, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:37,201 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 928019635, now seen corresponding path program 25 times [2019-09-07 12:06:37,202 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:37,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:37,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:37,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:37,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2679 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2454 trivial. 0 not checked. [2019-09-07 12:06:37,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:37,499 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:06:37,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:37,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 12:06:37,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2679 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2355 trivial. 0 not checked. [2019-09-07 12:06:38,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:38,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2019-09-07 12:06:38,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 12:06:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 12:06:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 12:06:38,006 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 37 states. [2019-09-07 12:06:38,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:38,212 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2019-09-07 12:06:38,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 12:06:38,212 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 188 [2019-09-07 12:06:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:38,213 INFO L225 Difference]: With dead ends: 201 [2019-09-07 12:06:38,213 INFO L226 Difference]: Without dead ends: 125 [2019-09-07 12:06:38,217 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 12:06:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-09-07 12:06:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2019-09-07 12:06:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-09-07 12:06:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2019-09-07 12:06:38,226 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 188 [2019-09-07 12:06:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:38,226 INFO L475 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2019-09-07 12:06:38,226 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 12:06:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2019-09-07 12:06:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-09-07 12:06:38,227 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:38,227 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 19, 19, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:38,227 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:38,228 INFO L82 PathProgramCache]: Analyzing trace with hash -451807469, now seen corresponding path program 26 times [2019-09-07 12:06:38,228 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:38,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:38,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:38,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:38,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2019-09-07 12:06:38,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:38,550 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:06:38,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:38,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:06:38,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:38,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 12:06:38,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2019-09-07 12:06:39,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:39,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2019-09-07 12:06:39,157 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 12:06:39,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 12:06:39,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:06:39,158 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 39 states. [2019-09-07 12:06:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:39,310 INFO L93 Difference]: Finished difference Result 207 states and 216 transitions. [2019-09-07 12:06:39,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 12:06:39,314 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 192 [2019-09-07 12:06:39,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:39,315 INFO L225 Difference]: With dead ends: 207 [2019-09-07 12:06:39,315 INFO L226 Difference]: Without dead ends: 129 [2019-09-07 12:06:39,318 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:06:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-07 12:06:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2019-09-07 12:06:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-09-07 12:06:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2019-09-07 12:06:39,328 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 192 [2019-09-07 12:06:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:39,328 INFO L475 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2019-09-07 12:06:39,328 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 12:06:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2019-09-07 12:06:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-09-07 12:06:39,331 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:39,332 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 20, 20, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:39,332 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:39,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2038112371, now seen corresponding path program 27 times [2019-09-07 12:06:39,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:39,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:39,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:39,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:39,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2019-09-07 12:06:39,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:39,666 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 12:06:39,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:42,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 12:06:42,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:42,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 12:06:42,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 968 proven. 225 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2019-09-07 12:06:42,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:42,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2019-09-07 12:06:42,838 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 12:06:42,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 12:06:42,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:06:42,839 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 36 states. [2019-09-07 12:06:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:42,965 INFO L93 Difference]: Finished difference Result 212 states and 223 transitions. [2019-09-07 12:06:42,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 12:06:42,966 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 196 [2019-09-07 12:06:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:42,967 INFO L225 Difference]: With dead ends: 212 [2019-09-07 12:06:42,967 INFO L226 Difference]: Without dead ends: 133 [2019-09-07 12:06:42,968 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:06:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-07 12:06:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2019-09-07 12:06:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 12:06:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2019-09-07 12:06:42,974 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 196 [2019-09-07 12:06:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:42,975 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2019-09-07 12:06:42,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 12:06:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2019-09-07 12:06:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-07 12:06:42,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:42,976 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 20, 20, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:42,977 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:42,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1122265839, now seen corresponding path program 28 times [2019-09-07 12:06:42,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:42,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:42,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:42,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:42,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2019-09-07 12:06:43,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:43,376 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 12:06:43,398 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:06:43,536 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:06:43,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:43,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 12:06:43,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2019-09-07 12:06:44,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:44,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2019-09-07 12:06:44,037 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-07 12:06:44,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-07 12:06:44,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 12:06:44,038 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 42 states. [2019-09-07 12:06:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:44,275 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2019-09-07 12:06:44,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-07 12:06:44,275 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 204 [2019-09-07 12:06:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:44,276 INFO L225 Difference]: With dead ends: 221 [2019-09-07 12:06:44,276 INFO L226 Difference]: Without dead ends: 137 [2019-09-07 12:06:44,278 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 12:06:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-09-07 12:06:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-09-07 12:06:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-07 12:06:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2019-09-07 12:06:44,290 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 204 [2019-09-07 12:06:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:44,290 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2019-09-07 12:06:44,290 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-07 12:06:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2019-09-07 12:06:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-07 12:06:44,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:44,292 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 21, 21, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:44,292 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1144273487, now seen corresponding path program 29 times [2019-09-07 12:06:44,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:44,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:44,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:44,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:44,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3217 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2856 trivial. 0 not checked. [2019-09-07 12:06:44,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:44,598 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 12:06:44,610 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:07:24,430 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-07 12:07:24,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:24,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 12:07:24,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3217 backedges. 1092 proven. 256 refuted. 0 times theorem prover too weak. 1869 trivial. 0 not checked. [2019-09-07 12:07:24,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:24,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2019-09-07 12:07:24,890 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 12:07:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 12:07:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:07:24,891 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 39 states. [2019-09-07 12:07:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:25,034 INFO L93 Difference]: Finished difference Result 226 states and 237 transitions. [2019-09-07 12:07:25,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 12:07:25,035 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 208 [2019-09-07 12:07:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:25,036 INFO L225 Difference]: With dead ends: 226 [2019-09-07 12:07:25,036 INFO L226 Difference]: Without dead ends: 141 [2019-09-07 12:07:25,038 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:07:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-07 12:07:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2019-09-07 12:07:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-09-07 12:07:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2019-09-07 12:07:25,044 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 208 [2019-09-07 12:07:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:25,045 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2019-09-07 12:07:25,045 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 12:07:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2019-09-07 12:07:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-09-07 12:07:25,046 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:25,046 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 21, 21, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:25,047 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash -397601077, now seen corresponding path program 30 times [2019-09-07 12:07:25,047 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:25,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:25,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:25,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:25,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3559 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3118 trivial. 0 not checked. [2019-09-07 12:07:25,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:25,468 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:25,494 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:07:30,596 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2019-09-07 12:07:30,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:30,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 12:07:30,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3559 backedges. 1232 proven. 289 refuted. 0 times theorem prover too weak. 2038 trivial. 0 not checked. [2019-09-07 12:07:30,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:30,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 42 [2019-09-07 12:07:30,962 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-07 12:07:30,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-07 12:07:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 12:07:30,963 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand 42 states. [2019-09-07 12:07:31,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:31,147 INFO L93 Difference]: Finished difference Result 235 states and 247 transitions. [2019-09-07 12:07:31,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-07 12:07:31,155 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 216 [2019-09-07 12:07:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:31,156 INFO L225 Difference]: With dead ends: 235 [2019-09-07 12:07:31,156 INFO L226 Difference]: Without dead ends: 145 [2019-09-07 12:07:31,158 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 12:07:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-09-07 12:07:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2019-09-07 12:07:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-09-07 12:07:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2019-09-07 12:07:31,164 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 216 [2019-09-07 12:07:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:31,164 INFO L475 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2019-09-07 12:07:31,164 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-07 12:07:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2019-09-07 12:07:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-07 12:07:31,166 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:31,166 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 22, 22, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:31,166 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:31,167 INFO L82 PathProgramCache]: Analyzing trace with hash -218692821, now seen corresponding path program 31 times [2019-09-07 12:07:31,167 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:31,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:31,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:31,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:31,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3523 trivial. 0 not checked. [2019-09-07 12:07:31,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:31,523 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:07:31,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:31,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 12:07:31,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3439 trivial. 0 not checked. [2019-09-07 12:07:32,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:32,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2019-09-07 12:07:32,226 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-07 12:07:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-07 12:07:32,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:07:32,227 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 46 states. [2019-09-07 12:07:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:32,372 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2019-09-07 12:07:32,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-07 12:07:32,372 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 224 [2019-09-07 12:07:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:32,373 INFO L225 Difference]: With dead ends: 241 [2019-09-07 12:07:32,374 INFO L226 Difference]: Without dead ends: 149 [2019-09-07 12:07:32,375 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:07:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-07 12:07:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2019-09-07 12:07:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-09-07 12:07:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2019-09-07 12:07:32,383 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 224 [2019-09-07 12:07:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:32,383 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2019-09-07 12:07:32,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-07 12:07:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2019-09-07 12:07:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-07 12:07:32,388 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:32,389 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 23, 23, 21, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:32,389 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:32,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:32,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1586515595, now seen corresponding path program 32 times [2019-09-07 12:07:32,390 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:32,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:32,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:32,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:07:32,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3568 trivial. 0 not checked. [2019-09-07 12:07:32,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:32,884 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:32,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:07:33,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:07:33,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:33,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:07:33,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2019-09-07 12:07:33,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:33,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2019-09-07 12:07:33,623 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-07 12:07:33,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-07 12:07:33,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 12:07:33,625 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 48 states. [2019-09-07 12:07:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:33,814 INFO L93 Difference]: Finished difference Result 247 states and 256 transitions. [2019-09-07 12:07:33,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-07 12:07:33,818 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 228 [2019-09-07 12:07:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:33,820 INFO L225 Difference]: With dead ends: 247 [2019-09-07 12:07:33,820 INFO L226 Difference]: Without dead ends: 153 [2019-09-07 12:07:33,821 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 12:07:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-07 12:07:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2019-09-07 12:07:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-07 12:07:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2019-09-07 12:07:33,828 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 228 [2019-09-07 12:07:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:33,828 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2019-09-07 12:07:33,828 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-07 12:07:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2019-09-07 12:07:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-09-07 12:07:33,830 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:33,830 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 24, 24, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:33,830 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:33,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1446018837, now seen corresponding path program 33 times [2019-09-07 12:07:33,831 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:33,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:33,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:33,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:33,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4099 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3615 trivial. 0 not checked. [2019-09-07 12:07:34,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:34,236 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:34,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:07:37,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-09-07 12:07:37,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:37,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 12:07:37,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4099 backedges. 1376 proven. 324 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2019-09-07 12:07:37,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:37,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 44 [2019-09-07 12:07:37,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 12:07:37,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 12:07:37,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1383, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 12:07:37,572 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand 44 states. [2019-09-07 12:07:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:37,761 INFO L93 Difference]: Finished difference Result 252 states and 263 transitions. [2019-09-07 12:07:37,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 12:07:37,761 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 232 [2019-09-07 12:07:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:37,762 INFO L225 Difference]: With dead ends: 252 [2019-09-07 12:07:37,762 INFO L226 Difference]: Without dead ends: 157 [2019-09-07 12:07:37,763 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=509, Invalid=1383, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 12:07:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-07 12:07:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2019-09-07 12:07:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-09-07 12:07:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2019-09-07 12:07:37,768 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 232 [2019-09-07 12:07:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:37,771 INFO L475 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2019-09-07 12:07:37,771 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 12:07:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2019-09-07 12:07:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-09-07 12:07:37,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:37,773 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 24, 24, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:37,773 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash -847905177, now seen corresponding path program 34 times [2019-09-07 12:07:37,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:37,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:37,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:37,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:37,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4483 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3907 trivial. 0 not checked. [2019-09-07 12:07:38,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:38,228 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:07:38,255 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:38,369 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:07:38,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:38,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 12:07:38,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4483 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3907 trivial. 0 not checked. [2019-09-07 12:07:38,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:38,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 12:07:38,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 12:07:38,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 12:07:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:07:38,430 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand 28 states. [2019-09-07 12:07:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:38,505 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-09-07 12:07:38,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 12:07:38,506 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 240 [2019-09-07 12:07:38,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:38,507 INFO L225 Difference]: With dead ends: 258 [2019-09-07 12:07:38,507 INFO L226 Difference]: Without dead ends: 158 [2019-09-07 12:07:38,508 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 240 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 12:07:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-09-07 12:07:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-09-07 12:07:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-07 12:07:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2019-09-07 12:07:38,514 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 240 [2019-09-07 12:07:38,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:38,514 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2019-09-07 12:07:38,514 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 12:07:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2019-09-07 12:07:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2019-09-07 12:07:38,516 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:38,516 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 25, 25, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:38,516 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:38,516 INFO L82 PathProgramCache]: Analyzing trace with hash -242555191, now seen corresponding path program 35 times [2019-09-07 12:07:38,517 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:38,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:38,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:38,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:38,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4532 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4003 trivial. 0 not checked. [2019-09-07 12:07:38,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:38,970 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:38,987 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:09:11,498 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-07 12:09:11,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:09:11,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 12:09:11,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4532 backedges. 1524 proven. 361 refuted. 0 times theorem prover too weak. 2647 trivial. 0 not checked. [2019-09-07 12:09:12,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:12,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 46 [2019-09-07 12:09:12,195 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-07 12:09:12,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-07 12:09:12,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:09:12,197 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 46 states. [2019-09-07 12:09:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:12,381 INFO L93 Difference]: Finished difference Result 262 states and 273 transitions. [2019-09-07 12:09:12,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-07 12:09:12,382 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 242 [2019-09-07 12:09:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:12,384 INFO L225 Difference]: With dead ends: 262 [2019-09-07 12:09:12,384 INFO L226 Difference]: Without dead ends: 163 [2019-09-07 12:09:12,386 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:09:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-07 12:09:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2019-09-07 12:09:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-07 12:09:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2019-09-07 12:09:12,392 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 242 [2019-09-07 12:09:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:12,393 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2019-09-07 12:09:12,393 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-07 12:09:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2019-09-07 12:09:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-09-07 12:09:12,395 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:12,395 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 25, 25, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:12,395 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:12,395 INFO L82 PathProgramCache]: Analyzing trace with hash -549538491, now seen corresponding path program 36 times [2019-09-07 12:09:12,396 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:12,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:12,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:12,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:09:12,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4936 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4311 trivial. 0 not checked. [2019-09-07 12:09:12,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:12,954 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:09:12,971 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:27,730 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2019-09-07 12:09:27,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:09:27,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 12:09:27,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4936 backedges. 1688 proven. 400 refuted. 0 times theorem prover too weak. 2848 trivial. 0 not checked. [2019-09-07 12:09:28,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:28,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23] total 49 [2019-09-07 12:09:28,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-07 12:09:28,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-07 12:09:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=1722, Unknown=0, NotChecked=0, Total=2352 [2019-09-07 12:09:28,269 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand 49 states. [2019-09-07 12:09:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:28,469 INFO L93 Difference]: Finished difference Result 271 states and 283 transitions. [2019-09-07 12:09:28,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-07 12:09:28,470 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 250 [2019-09-07 12:09:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:28,471 INFO L225 Difference]: With dead ends: 271 [2019-09-07 12:09:28,471 INFO L226 Difference]: Without dead ends: 167 [2019-09-07 12:09:28,473 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=1722, Unknown=0, NotChecked=0, Total=2352 [2019-09-07 12:09:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-09-07 12:09:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-09-07 12:09:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-09-07 12:09:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2019-09-07 12:09:28,479 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 250 [2019-09-07 12:09:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:28,479 INFO L475 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2019-09-07 12:09:28,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-07 12:09:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2019-09-07 12:09:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-09-07 12:09:28,481 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:28,481 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 26, 26, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:28,481 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1383752101, now seen corresponding path program 37 times [2019-09-07 12:09:28,482 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:28,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:28,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:28,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:09:28,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2019-09-07 12:09:29,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:29,008 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:09:29,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:29,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 12:09:29,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4686 trivial. 0 not checked. [2019-09-07 12:09:29,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:29,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2019-09-07 12:09:29,861 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-07 12:09:29,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-07 12:09:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:09:29,863 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 54 states. [2019-09-07 12:09:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:30,099 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2019-09-07 12:09:30,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-07 12:09:30,100 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2019-09-07 12:09:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:30,102 INFO L225 Difference]: With dead ends: 277 [2019-09-07 12:09:30,102 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 12:09:30,103 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:09:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 12:09:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2019-09-07 12:09:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-09-07 12:09:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2019-09-07 12:09:30,110 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 258 [2019-09-07 12:09:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:30,110 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2019-09-07 12:09:30,110 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-07 12:09:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2019-09-07 12:09:30,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-09-07 12:09:30,112 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:30,112 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 27, 27, 25, 25, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:30,112 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:30,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:30,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1242083835, now seen corresponding path program 38 times [2019-09-07 12:09:30,113 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:30,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:30,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:30,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:09:30,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4839 trivial. 0 not checked. [2019-09-07 12:09:30,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:30,730 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:30,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:09:30,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:09:30,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:09:30,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 12:09:30,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 4735 trivial. 0 not checked. [2019-09-07 12:09:31,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:31,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 56 [2019-09-07 12:09:31,628 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-07 12:09:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-07 12:09:31,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:09:31,630 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand 56 states. [2019-09-07 12:09:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:31,856 INFO L93 Difference]: Finished difference Result 283 states and 292 transitions. [2019-09-07 12:09:31,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-07 12:09:31,856 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 262 [2019-09-07 12:09:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:31,858 INFO L225 Difference]: With dead ends: 283 [2019-09-07 12:09:31,858 INFO L226 Difference]: Without dead ends: 175 [2019-09-07 12:09:31,859 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:09:31,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-09-07 12:09:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2019-09-07 12:09:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-09-07 12:09:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2019-09-07 12:09:31,867 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 262 [2019-09-07 12:09:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:31,867 INFO L475 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2019-09-07 12:09:31,867 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-07 12:09:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2019-09-07 12:09:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-09-07 12:09:31,869 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:31,869 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 28, 28, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:31,869 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:31,870 INFO L82 PathProgramCache]: Analyzing trace with hash -215604891, now seen corresponding path program 39 times [2019-09-07 12:09:31,870 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:31,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:31,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:31,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:09:31,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5570 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4894 trivial. 0 not checked. [2019-09-07 12:09:32,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:32,504 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:32,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:09:37,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 12:09:37,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:09:37,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 12:09:37,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5570 backedges. 1856 proven. 441 refuted. 0 times theorem prover too weak. 3273 trivial. 0 not checked. [2019-09-07 12:09:38,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:38,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 51 [2019-09-07 12:09:38,331 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-07 12:09:38,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-07 12:09:38,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=1869, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 12:09:38,332 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand 51 states. [2019-09-07 12:09:38,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:38,580 INFO L93 Difference]: Finished difference Result 288 states and 299 transitions. [2019-09-07 12:09:38,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-07 12:09:38,580 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 266 [2019-09-07 12:09:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:38,581 INFO L225 Difference]: With dead ends: 288 [2019-09-07 12:09:38,581 INFO L226 Difference]: Without dead ends: 179 [2019-09-07 12:09:38,582 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=681, Invalid=1869, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 12:09:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-07 12:09:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2019-09-07 12:09:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-07 12:09:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2019-09-07 12:09:38,589 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 266 [2019-09-07 12:09:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:38,589 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2019-09-07 12:09:38,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-07 12:09:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2019-09-07 12:09:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2019-09-07 12:09:38,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:38,591 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 28, 28, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:38,592 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:38,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2123132703, now seen corresponding path program 40 times [2019-09-07 12:09:38,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:38,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:38,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:38,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:09:38,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6016 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5232 trivial. 0 not checked. [2019-09-07 12:09:39,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:39,166 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:39,178 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:09:39,311 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:09:39,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:09:39,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 12:09:39,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:09:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6016 backedges. 2032 proven. 484 refuted. 0 times theorem prover too weak. 3500 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (42)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:09:39,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:09:39,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 54 [2019-09-07 12:09:39,840 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-07 12:09:39,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-07 12:09:39,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=2098, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:09:39,841 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 54 states. [2019-09-07 12:09:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:09:40,102 INFO L93 Difference]: Finished difference Result 297 states and 309 transitions. [2019-09-07 12:09:40,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-07 12:09:40,104 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 274 [2019-09-07 12:09:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:09:40,106 INFO L225 Difference]: With dead ends: 297 [2019-09-07 12:09:40,106 INFO L226 Difference]: Without dead ends: 183 [2019-09-07 12:09:40,107 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=764, Invalid=2098, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:09:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-07 12:09:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2019-09-07 12:09:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-09-07 12:09:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2019-09-07 12:09:40,112 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 274 [2019-09-07 12:09:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:09:40,113 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2019-09-07 12:09:40,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-07 12:09:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2019-09-07 12:09:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-09-07 12:09:40,115 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:09:40,115 INFO L399 BasicCegarLoop]: trace histogram [69, 69, 29, 29, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:09:40,115 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:09:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:09:40,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1656901823, now seen corresponding path program 41 times [2019-09-07 12:09:40,116 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:09:40,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:09:40,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:40,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:09:40,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:09:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:09:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6484 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5755 trivial. 0 not checked. [2019-09-07 12:09:40,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:09:40,597 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:09:40,608 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:11:46,699 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2019-09-07 12:11:46,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:11:46,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:11:46,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:11:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6484 backedges. 2212 proven. 529 refuted. 0 times theorem prover too weak. 3743 trivial. 0 not checked. [2019-09-07 12:11:47,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:11:47,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 54 [2019-09-07 12:11:47,264 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-07 12:11:47,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-07 12:11:47,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=2103, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:11:47,265 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand 54 states. [2019-09-07 12:11:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:11:47,501 INFO L93 Difference]: Finished difference Result 302 states and 313 transitions. [2019-09-07 12:11:47,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-07 12:11:47,502 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 282 [2019-09-07 12:11:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:11:47,503 INFO L225 Difference]: With dead ends: 302 [2019-09-07 12:11:47,503 INFO L226 Difference]: Without dead ends: 187 [2019-09-07 12:11:47,504 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=759, Invalid=2103, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:11:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-09-07 12:11:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2019-09-07 12:11:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-09-07 12:11:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2019-09-07 12:11:47,510 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 282 [2019-09-07 12:11:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:11:47,511 INFO L475 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2019-09-07 12:11:47,511 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-07 12:11:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2019-09-07 12:11:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2019-09-07 12:11:47,513 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:11:47,513 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 29, 29, 28, 28, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:11:47,513 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:11:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:11:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash -259833411, now seen corresponding path program 42 times [2019-09-07 12:11:47,514 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:11:47,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:11:47,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:11:47,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:11:47,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:11:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:11:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6968 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6127 trivial. 0 not checked. [2019-09-07 12:11:48,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:11:48,052 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:11:48,063 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:12:07,332 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-07 12:12:07,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:12:07,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 12:12:07,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6968 backedges. 2408 proven. 576 refuted. 0 times theorem prover too weak. 3984 trivial. 0 not checked. [2019-09-07 12:12:07,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:07,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27] total 57 [2019-09-07 12:12:07,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-07 12:12:07,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-07 12:12:07,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=2346, Unknown=0, NotChecked=0, Total=3192 [2019-09-07 12:12:07,929 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand 57 states. [2019-09-07 12:12:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:08,154 INFO L93 Difference]: Finished difference Result 311 states and 323 transitions. [2019-09-07 12:12:08,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-07 12:12:08,156 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 290 [2019-09-07 12:12:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:08,157 INFO L225 Difference]: With dead ends: 311 [2019-09-07 12:12:08,157 INFO L226 Difference]: Without dead ends: 191 [2019-09-07 12:12:08,158 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=846, Invalid=2346, Unknown=0, NotChecked=0, Total=3192 [2019-09-07 12:12:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-09-07 12:12:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2019-09-07 12:12:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-07 12:12:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2019-09-07 12:12:08,163 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 290 [2019-09-07 12:12:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:08,163 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2019-09-07 12:12:08,163 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-07 12:12:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2019-09-07 12:12:08,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-09-07 12:12:08,165 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:08,165 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 30, 30, 28, 28, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:08,165 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:08,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:08,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1906956771, now seen corresponding path program 43 times [2019-09-07 12:12:08,165 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:08,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:08,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:08,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:12:08,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6690 trivial. 0 not checked. [2019-09-07 12:12:08,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:08,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:08,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:12:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:08,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:12:08,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 6574 trivial. 0 not checked. [2019-09-07 12:12:09,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:09,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 62 [2019-09-07 12:12:09,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:12:09,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:12:09,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:12:09,656 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand 62 states. [2019-09-07 12:12:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:09,894 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-09-07 12:12:09,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:12:09,895 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 298 [2019-09-07 12:12:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:09,896 INFO L225 Difference]: With dead ends: 317 [2019-09-07 12:12:09,896 INFO L226 Difference]: Without dead ends: 195 [2019-09-07 12:12:09,898 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:12:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-09-07 12:12:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2019-09-07 12:12:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-09-07 12:12:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2019-09-07 12:12:09,904 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 298 [2019-09-07 12:12:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:09,905 INFO L475 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2019-09-07 12:12:09,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:12:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2019-09-07 12:12:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-09-07 12:12:09,907 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:09,907 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 31, 31, 29, 29, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:09,907 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:09,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2131686787, now seen corresponding path program 44 times [2019-09-07 12:12:09,908 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:09,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:09,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:09,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:12:09,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6751 trivial. 0 not checked. [2019-09-07 12:12:10,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:10,417 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:10,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:12:10,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:12:10,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:12:10,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 12:12:10,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 6631 trivial. 0 not checked. [2019-09-07 12:12:11,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:11,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34] total 64 [2019-09-07 12:12:11,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-07 12:12:11,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-07 12:12:11,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2019-09-07 12:12:11,439 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand 64 states. [2019-09-07 12:12:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:11,740 INFO L93 Difference]: Finished difference Result 323 states and 332 transitions. [2019-09-07 12:12:11,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-07 12:12:11,741 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 302 [2019-09-07 12:12:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:11,742 INFO L225 Difference]: With dead ends: 323 [2019-09-07 12:12:11,742 INFO L226 Difference]: Without dead ends: 199 [2019-09-07 12:12:11,744 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2019-09-07 12:12:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-09-07 12:12:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2019-09-07 12:12:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-09-07 12:12:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 201 transitions. [2019-09-07 12:12:11,751 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 201 transitions. Word has length 302 [2019-09-07 12:12:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:11,752 INFO L475 AbstractCegarLoop]: Abstraction has 197 states and 201 transitions. [2019-09-07 12:12:11,752 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-07 12:12:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 201 transitions. [2019-09-07 12:12:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-09-07 12:12:11,754 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:11,754 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 32, 32, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:11,754 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:11,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1542772189, now seen corresponding path program 45 times [2019-09-07 12:12:11,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:11,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:11,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:11,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:12:11,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7714 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 6814 trivial. 0 not checked. [2019-09-07 12:12:12,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:12,672 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:12,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:12:19,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2019-09-07 12:12:19,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:12:19,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 12:12:19,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7714 backedges. 2608 proven. 625 refuted. 0 times theorem prover too weak. 4481 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (47)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:12:20,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:20,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28] total 59 [2019-09-07 12:12:20,253 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-07 12:12:20,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-07 12:12:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=2517, Unknown=0, NotChecked=0, Total=3422 [2019-09-07 12:12:20,255 INFO L87 Difference]: Start difference. First operand 197 states and 201 transitions. Second operand 59 states. [2019-09-07 12:12:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:20,486 INFO L93 Difference]: Finished difference Result 328 states and 339 transitions. [2019-09-07 12:12:20,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-07 12:12:20,486 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 306 [2019-09-07 12:12:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:20,487 INFO L225 Difference]: With dead ends: 328 [2019-09-07 12:12:20,487 INFO L226 Difference]: Without dead ends: 203 [2019-09-07 12:12:20,489 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=2517, Unknown=0, NotChecked=0, Total=3422 [2019-09-07 12:12:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-09-07 12:12:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2019-09-07 12:12:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-09-07 12:12:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2019-09-07 12:12:20,495 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 306 [2019-09-07 12:12:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:20,495 INFO L475 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2019-09-07 12:12:20,495 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-07 12:12:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2019-09-07 12:12:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2019-09-07 12:12:20,497 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:20,497 INFO L399 BasicCegarLoop]: trace histogram [78, 78, 32, 32, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:20,498 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:20,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:20,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1517750617, now seen corresponding path program 46 times [2019-09-07 12:12:20,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:20,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:20,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:20,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:12:20,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8240 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 7216 trivial. 0 not checked. [2019-09-07 12:12:21,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:21,076 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:21,087 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:12:21,227 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:12:21,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:12:21,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 12:12:21,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8240 backedges. 2816 proven. 676 refuted. 0 times theorem prover too weak. 4748 trivial. 0 not checked. [2019-09-07 12:12:22,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:22,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29] total 62 [2019-09-07 12:12:22,165 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:12:22,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:12:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=2782, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:12:22,166 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand 62 states. [2019-09-07 12:12:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:22,423 INFO L93 Difference]: Finished difference Result 337 states and 349 transitions. [2019-09-07 12:12:22,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:12:22,424 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 314 [2019-09-07 12:12:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:22,425 INFO L225 Difference]: With dead ends: 337 [2019-09-07 12:12:22,425 INFO L226 Difference]: Without dead ends: 207 [2019-09-07 12:12:22,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1000, Invalid=2782, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:12:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-09-07 12:12:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2019-09-07 12:12:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-09-07 12:12:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 209 transitions. [2019-09-07 12:12:22,431 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 209 transitions. Word has length 314 [2019-09-07 12:12:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:22,432 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 209 transitions. [2019-09-07 12:12:22,432 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:12:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 209 transitions. [2019-09-07 12:12:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2019-09-07 12:12:22,434 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:22,434 INFO L399 BasicCegarLoop]: trace histogram [81, 81, 33, 33, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:22,434 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 287596473, now seen corresponding path program 47 times [2019-09-07 12:12:22,435 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:22,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:22,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:22,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:12:22,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8788 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7827 trivial. 0 not checked. [2019-09-07 12:12:23,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:23,081 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:23,092 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:15:27,234 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2019-09-07 12:15:27,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:15:27,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 12:15:27,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:15:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8788 backedges. 3028 proven. 729 refuted. 0 times theorem prover too weak. 5031 trivial. 0 not checked. [2019-09-07 12:15:28,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:15:28,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30] total 62 [2019-09-07 12:15:28,043 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:15:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:15:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=2787, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:15:28,044 INFO L87 Difference]: Start difference. First operand 205 states and 209 transitions. Second operand 62 states. [2019-09-07 12:15:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:15:28,317 INFO L93 Difference]: Finished difference Result 342 states and 353 transitions. [2019-09-07 12:15:28,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:15:28,318 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 322 [2019-09-07 12:15:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:15:28,320 INFO L225 Difference]: With dead ends: 342 [2019-09-07 12:15:28,320 INFO L226 Difference]: Without dead ends: 211 [2019-09-07 12:15:28,322 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=995, Invalid=2787, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:15:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-09-07 12:15:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2019-09-07 12:15:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-09-07 12:15:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 213 transitions. [2019-09-07 12:15:28,333 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 213 transitions. Word has length 322 [2019-09-07 12:15:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:15:28,333 INFO L475 AbstractCegarLoop]: Abstraction has 209 states and 213 transitions. [2019-09-07 12:15:28,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:15:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 213 transitions. [2019-09-07 12:15:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2019-09-07 12:15:28,335 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:15:28,336 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 33, 33, 32, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:15:28,336 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:15:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:15:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1584417227, now seen corresponding path program 48 times [2019-09-07 12:15:28,336 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:15:28,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:15:28,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:15:28,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:15:28,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:15:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:15:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9352 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8263 trivial. 0 not checked. [2019-09-07 12:15:29,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:15:29,104 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:15:29,114 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:16:00,313 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2019-09-07 12:16:00,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:16:00,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-07 12:16:00,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:16:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9352 backedges. 3256 proven. 784 refuted. 0 times theorem prover too weak. 5312 trivial. 0 not checked. [2019-09-07 12:16:01,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:16:01,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 31] total 65 [2019-09-07 12:16:01,064 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-07 12:16:01,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-07 12:16:01,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1094, Invalid=3066, Unknown=0, NotChecked=0, Total=4160 [2019-09-07 12:16:01,065 INFO L87 Difference]: Start difference. First operand 209 states and 213 transitions. Second operand 65 states. [2019-09-07 12:16:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:16:01,352 INFO L93 Difference]: Finished difference Result 351 states and 363 transitions. [2019-09-07 12:16:01,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-07 12:16:01,355 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 330 [2019-09-07 12:16:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:16:01,356 INFO L225 Difference]: With dead ends: 351 [2019-09-07 12:16:01,356 INFO L226 Difference]: Without dead ends: 215 [2019-09-07 12:16:01,357 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1094, Invalid=3066, Unknown=0, NotChecked=0, Total=4160 [2019-09-07 12:16:01,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-09-07 12:16:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2019-09-07 12:16:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-09-07 12:16:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2019-09-07 12:16:01,364 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 330 [2019-09-07 12:16:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:16:01,364 INFO L475 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2019-09-07 12:16:01,364 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-07 12:16:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2019-09-07 12:16:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-09-07 12:16:01,366 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:16:01,366 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 34, 34, 32, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:16:01,366 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:16:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:16:01,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2113524373, now seen corresponding path program 49 times [2019-09-07 12:16:01,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:16:01,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:16:01,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:01,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:16:01,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:16:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8914 trivial. 0 not checked. [2019-09-07 12:16:01,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:16:01,983 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:16:01,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:16:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:16:02,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 12:16:02,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:16:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [2019-09-07 12:16:03,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:16:03,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37] total 70 [2019-09-07 12:16:03,165 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-07 12:16:03,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-07 12:16:03,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:16:03,166 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 70 states. [2019-09-07 12:16:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:16:03,468 INFO L93 Difference]: Finished difference Result 357 states and 366 transitions. [2019-09-07 12:16:03,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-07 12:16:03,469 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 338 [2019-09-07 12:16:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:16:03,470 INFO L225 Difference]: With dead ends: 357 [2019-09-07 12:16:03,470 INFO L226 Difference]: Without dead ends: 219 [2019-09-07 12:16:03,472 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:16:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-09-07 12:16:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2019-09-07 12:16:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-09-07 12:16:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2019-09-07 12:16:03,478 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 338 [2019-09-07 12:16:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:16:03,478 INFO L475 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2019-09-07 12:16:03,478 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-07 12:16:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2019-09-07 12:16:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-09-07 12:16:03,480 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:16:03,480 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 35, 35, 33, 33, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:16:03,481 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:16:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:16:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1804947723, now seen corresponding path program 50 times [2019-09-07 12:16:03,481 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:16:03,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:16:03,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:03,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:16:03,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:16:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8983 trivial. 0 not checked. [2019-09-07 12:16:04,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:16:04,106 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:16:04,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:16:04,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:16:04,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:16:04,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 12:16:04,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:16:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 8847 trivial. 0 not checked. [2019-09-07 12:16:05,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:16:05,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38] total 72 [2019-09-07 12:16:05,283 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-07 12:16:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-07 12:16:05,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=3780, Unknown=0, NotChecked=0, Total=5112 [2019-09-07 12:16:05,284 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand 72 states. [2019-09-07 12:16:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:16:05,598 INFO L93 Difference]: Finished difference Result 363 states and 372 transitions. [2019-09-07 12:16:05,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-07 12:16:05,598 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 342 [2019-09-07 12:16:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:16:05,599 INFO L225 Difference]: With dead ends: 363 [2019-09-07 12:16:05,599 INFO L226 Difference]: Without dead ends: 223 [2019-09-07 12:16:05,600 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1332, Invalid=3780, Unknown=0, NotChecked=0, Total=5112 [2019-09-07 12:16:05,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-09-07 12:16:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2019-09-07 12:16:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-09-07 12:16:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2019-09-07 12:16:05,606 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 342 [2019-09-07 12:16:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:16:05,607 INFO L475 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2019-09-07 12:16:05,607 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-07 12:16:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2019-09-07 12:16:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2019-09-07 12:16:05,609 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:16:05,609 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 36, 36, 34, 34, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:16:05,610 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:16:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:16:05,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1694797227, now seen corresponding path program 51 times [2019-09-07 12:16:05,610 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:16:05,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:16:05,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:05,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:16:05,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:16:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10210 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 9054 trivial. 0 not checked. [2019-09-07 12:16:06,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:16:06,615 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:16:06,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:16:17,853 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-07 12:16:17,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:16:17,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 61 conjunts are in the unsatisfiable core [2019-09-07 12:16:17,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:16:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10210 backedges. 3626 proven. 841 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2019-09-07 12:16:18,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:16:18,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 71 [2019-09-07 12:16:18,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-07 12:16:18,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-07 12:16:18,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=3729, Unknown=0, NotChecked=0, Total=4970 [2019-09-07 12:16:18,860 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand 71 states. [2019-09-07 12:16:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:16:20,470 INFO L93 Difference]: Finished difference Result 369 states and 381 transitions. [2019-09-07 12:16:20,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-07 12:16:20,471 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 346 [2019-09-07 12:16:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:16:20,472 INFO L225 Difference]: With dead ends: 369 [2019-09-07 12:16:20,472 INFO L226 Difference]: Without dead ends: 228 [2019-09-07 12:16:20,474 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2721, Invalid=8835, Unknown=0, NotChecked=0, Total=11556 [2019-09-07 12:16:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-09-07 12:16:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2019-09-07 12:16:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-09-07 12:16:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2019-09-07 12:16:20,480 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 346 [2019-09-07 12:16:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:16:20,481 INFO L475 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2019-09-07 12:16:20,481 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-07 12:16:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2019-09-07 12:16:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2019-09-07 12:16:20,483 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:16:20,484 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 36, 36, 36, 36, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:16:20,484 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:16:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:16:20,484 INFO L82 PathProgramCache]: Analyzing trace with hash -271087665, now seen corresponding path program 52 times [2019-09-07 12:16:20,484 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:16:20,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:16:20,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:20,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:16:20,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:16:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10887 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2019-09-07 12:16:21,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:16:21,418 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:16:21,439 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:16:21,593 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:16:21,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:16:21,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-07 12:16:21,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:16:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10887 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2019-09-07 12:16:21,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:16:21,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-09-07 12:16:21,663 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-07 12:16:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-07 12:16:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-09-07 12:16:21,664 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand 40 states. [2019-09-07 12:16:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:16:21,820 INFO L93 Difference]: Finished difference Result 378 states and 386 transitions. [2019-09-07 12:16:21,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 12:16:21,823 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 356 [2019-09-07 12:16:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:16:21,828 INFO L225 Difference]: With dead ends: 378 [2019-09-07 12:16:21,828 INFO L226 Difference]: Without dead ends: 230 [2019-09-07 12:16:21,829 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-09-07 12:16:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-09-07 12:16:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2019-09-07 12:16:21,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-09-07 12:16:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 233 transitions. [2019-09-07 12:16:21,836 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 233 transitions. Word has length 356 [2019-09-07 12:16:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:16:21,836 INFO L475 AbstractCegarLoop]: Abstraction has 229 states and 233 transitions. [2019-09-07 12:16:21,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-07 12:16:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 233 transitions. [2019-09-07 12:16:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2019-09-07 12:16:21,838 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:16:21,839 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 37, 37, 36, 36, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:16:21,839 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:16:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:16:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2110500047, now seen corresponding path program 53 times [2019-09-07 12:16:21,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:16:21,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:16:21,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:21,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:16:21,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:16:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:16:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10960 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2019-09-07 12:16:22,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:16:22,776 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:16:22,789 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:20:09,224 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2019-09-07 12:20:09,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:20:09,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:20:09,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:20:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10960 backedges. 3724 proven. 900 refuted. 0 times theorem prover too weak. 6336 trivial. 0 not checked. [2019-09-07 12:20:10,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:20:10,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 33] total 71 [2019-09-07 12:20:10,198 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-07 12:20:10,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-07 12:20:10,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=3663, Unknown=0, NotChecked=0, Total=4970 [2019-09-07 12:20:10,199 INFO L87 Difference]: Start difference. First operand 229 states and 233 transitions. Second operand 71 states. [2019-09-07 12:20:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:20:10,517 INFO L93 Difference]: Finished difference Result 383 states and 395 transitions. [2019-09-07 12:20:10,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-07 12:20:10,517 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 358 [2019-09-07 12:20:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:20:10,518 INFO L225 Difference]: With dead ends: 383 [2019-09-07 12:20:10,519 INFO L226 Difference]: Without dead ends: 235 [2019-09-07 12:20:10,520 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1307, Invalid=3663, Unknown=0, NotChecked=0, Total=4970 [2019-09-07 12:20:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-09-07 12:20:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2019-09-07 12:20:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-09-07 12:20:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2019-09-07 12:20:10,527 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 358 [2019-09-07 12:20:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:20:10,528 INFO L475 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2019-09-07 12:20:10,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-07 12:20:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2019-09-07 12:20:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2019-09-07 12:20:10,530 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:20:10,530 INFO L399 BasicCegarLoop]: trace histogram [93, 93, 38, 38, 36, 36, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:20:10,530 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:20:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:20:10,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1699952529, now seen corresponding path program 54 times [2019-09-07 12:20:10,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:20:10,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:20:10,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:20:10,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:20:10,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:20:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:20:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11590 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10294 trivial. 0 not checked. [2019-09-07 12:20:11,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:20:11,236 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:20:11,246 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE