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/reducercommutativity/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 11:16:17,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 11:16:17,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 11:16:17,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 11:16:17,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 11:16:17,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 11:16:17,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 11:16:17,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 11:16:17,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 11:16:17,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 11:16:17,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 11:16:17,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 11:16:17,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 11:16:17,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 11:16:17,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 11:16:17,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 11:16:17,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 11:16:17,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 11:16:17,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 11:16:17,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 11:16:17,375 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 11:16:17,388 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 11:16:17,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 11:16:17,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 11:16:17,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 11:16:17,390 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 11:16:17,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 11:16:17,390 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 11:16:17,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 11:16:17,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 11:16:17,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 11:16:17,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 11:16:17,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 11:16:17,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 11:16:17,392 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 11:16:17,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 11:16:17,392 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 11:16:17,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 11:16:17,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 11:16:17,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 11:16:17,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 11:16:17,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 11:16:17,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 11:16:17,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 11:16:17,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 11:16:17,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 11:16:17,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 11:16:17,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 11:16:17,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 11:16:17,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 11:16:17,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 11:16:17,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 11:16:17,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 11:16:17,439 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 11:16:17,439 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 11:16:17,440 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-09-07 11:16:17,498 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/171a3dff0/c428915a26894a30a1b2342ef849f966/FLAG235b094c4 [2019-09-07 11:16:17,914 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 11:16:17,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-09-07 11:16:17,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/171a3dff0/c428915a26894a30a1b2342ef849f966/FLAG235b094c4 [2019-09-07 11:16:18,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/171a3dff0/c428915a26894a30a1b2342ef849f966 [2019-09-07 11:16:18,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 11:16:18,362 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 11:16:18,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 11:16:18,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 11:16:18,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 11:16:18,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:16:18" (1/1) ... [2019-09-07 11:16:18,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aaddbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18, skipping insertion in model container [2019-09-07 11:16:18,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:16:18" (1/1) ... [2019-09-07 11:16:18,377 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 11:16:18,395 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 11:16:18,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:16:18,653 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 11:16:18,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:16:18,818 INFO L192 MainTranslator]: Completed translation [2019-09-07 11:16:18,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18 WrapperNode [2019-09-07 11:16:18,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 11:16:18,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 11:16:18,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 11:16:18,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 11:16:18,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18" (1/1) ... [2019-09-07 11:16:18,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18" (1/1) ... [2019-09-07 11:16:18,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18" (1/1) ... [2019-09-07 11:16:18,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18" (1/1) ... [2019-09-07 11:16:18,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18" (1/1) ... [2019-09-07 11:16:18,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18" (1/1) ... [2019-09-07 11:16:18,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18" (1/1) ... [2019-09-07 11:16:18,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 11:16:18,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 11:16:18,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 11:16:18,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 11:16:18,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18" (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 11:16:18,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 11:16:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 11:16:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-09-07 11:16:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 11:16:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 11:16:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 11:16:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-09-07 11:16:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 11:16:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 11:16:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 11:16:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 11:16:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 11:16:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 11:16:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 11:16:19,206 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 11:16:19,206 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 11:16:19,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:16:19 BoogieIcfgContainer [2019-09-07 11:16:19,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 11:16:19,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 11:16:19,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 11:16:19,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 11:16:19,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 11:16:18" (1/3) ... [2019-09-07 11:16:19,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f256a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:16:19, skipping insertion in model container [2019-09-07 11:16:19,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:16:18" (2/3) ... [2019-09-07 11:16:19,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f256a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:16:19, skipping insertion in model container [2019-09-07 11:16:19,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:16:19" (3/3) ... [2019-09-07 11:16:19,218 INFO L109 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2019-09-07 11:16:19,231 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 11:16:19,238 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 11:16:19,255 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 11:16:19,286 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 11:16:19,287 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 11:16:19,287 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 11:16:19,287 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 11:16:19,287 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 11:16:19,287 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 11:16:19,288 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 11:16:19,288 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 11:16:19,288 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 11:16:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-07 11:16:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:16:19,314 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:19,315 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 11:16:19,317 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-09-07 11:16:19,325 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:19,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:19,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:19,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:19,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:19,461 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 11:16:19,464 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:16:19,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 11:16:19,468 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 11:16:19,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 11:16:19,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 11:16:19,484 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-09-07 11:16:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:19,508 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-09-07 11:16:19,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 11:16:19,509 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-07 11:16:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:19,518 INFO L225 Difference]: With dead ends: 56 [2019-09-07 11:16:19,518 INFO L226 Difference]: Without dead ends: 27 [2019-09-07 11:16:19,522 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 11:16:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-07 11:16:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-07 11:16:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 11:16:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-09-07 11:16:19,564 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-09-07 11:16:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:19,565 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-09-07 11:16:19,565 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 11:16:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-09-07 11:16:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:16:19,567 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:19,568 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 11:16:19,568 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-09-07 11:16:19,569 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:19,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:19,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:19,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:19,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:19,641 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 11:16:19,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:16:19,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:16:19,644 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:16:19,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:16:19,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:16:19,645 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-09-07 11:16:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:19,696 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-09-07 11:16:19,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:16:19,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-07 11:16:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:19,698 INFO L225 Difference]: With dead ends: 48 [2019-09-07 11:16:19,698 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 11:16:19,700 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 11:16:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 11:16:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-07 11:16:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 11:16:19,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-07 11:16:19,707 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-09-07 11:16:19,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:19,708 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-07 11:16:19,708 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:16:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-07 11:16:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 11:16:19,710 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:19,710 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 11:16:19,710 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:19,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:19,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-09-07 11:16:19,711 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:19,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:19,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:19,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:19,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:19,789 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 11:16:19,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:19,790 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 11:16:19,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:19,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 11:16:19,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 11:16:19,904 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:16:19,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-07 11:16:19,906 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 11:16:19,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 11:16:19,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:16:19,908 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-09-07 11:16:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:19,953 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-09-07 11:16:19,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:16:19,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-07 11:16:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:19,956 INFO L225 Difference]: With dead ends: 49 [2019-09-07 11:16:19,956 INFO L226 Difference]: Without dead ends: 31 [2019-09-07 11:16:19,957 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 11:16:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-07 11:16:19,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-09-07 11:16:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 11:16:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-09-07 11:16:19,968 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-09-07 11:16:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:19,969 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-09-07 11:16:19,969 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 11:16:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-09-07 11:16:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-07 11:16:19,971 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:19,972 INFO L399 BasicCegarLoop]: trace histogram [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 11:16:19,972 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-09-07 11:16:19,973 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:19,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:19,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:19,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:19,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-07 11:16:20,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:16:20,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:16:20,058 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:16:20,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:16:20,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:16:20,059 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-09-07 11:16:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:20,082 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-09-07 11:16:20,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:16:20,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-09-07 11:16:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:20,084 INFO L225 Difference]: With dead ends: 45 [2019-09-07 11:16:20,084 INFO L226 Difference]: Without dead ends: 31 [2019-09-07 11:16:20,085 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 11:16:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-07 11:16:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-07 11:16:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-07 11:16:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-09-07 11:16:20,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-09-07 11:16:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:20,102 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-09-07 11:16:20,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:16:20,103 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-09-07 11:16:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-07 11:16:20,107 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:20,107 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:16:20,107 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:20,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:20,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-09-07 11:16:20,108 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:20,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:20,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:20,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:20,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-07 11:16:20,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:20,237 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 11:16:20,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:20,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:16:20,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-07 11:16:20,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:20,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 11:16:20,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:16:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:16:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:16:20,327 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-09-07 11:16:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:20,362 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-09-07 11:16:20,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 11:16:20,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-09-07 11:16:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:20,365 INFO L225 Difference]: With dead ends: 54 [2019-09-07 11:16:20,365 INFO L226 Difference]: Without dead ends: 33 [2019-09-07 11:16:20,366 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 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 11:16:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-07 11:16:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-07 11:16:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 11:16:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-09-07 11:16:20,372 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-09-07 11:16:20,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:20,373 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-09-07 11:16:20,373 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:16:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-09-07 11:16:20,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 11:16:20,374 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:20,374 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:16:20,375 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:20,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-09-07 11:16:20,375 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:20,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:20,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:20,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:20,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-09-07 11:16:20,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:20,482 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 11:16:20,506 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 11:16:20,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:16:20,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:20,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:16:20,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-07 11:16:20,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:20,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-07 11:16:20,603 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:16:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:16:20,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:16:20,604 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-09-07 11:16:20,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:20,651 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2019-09-07 11:16:20,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:16:20,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-09-07 11:16:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:20,653 INFO L225 Difference]: With dead ends: 61 [2019-09-07 11:16:20,653 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 11:16:20,654 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:16:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 11:16:20,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-09-07 11:16:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 11:16:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2019-09-07 11:16:20,663 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 47 [2019-09-07 11:16:20,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:20,664 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-09-07 11:16:20,664 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:16:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2019-09-07 11:16:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-07 11:16:20,665 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:20,665 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 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 11:16:20,666 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:20,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1057089466, now seen corresponding path program 3 times [2019-09-07 11:16:20,666 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:20,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:20,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:20,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:20,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-09-07 11:16:20,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:20,753 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 11:16:20,767 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 11:16:20,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 11:16:20,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:20,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:16:20,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:16:20,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:20,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-07 11:16:20,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:16:20,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:16:20,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:16:20,842 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 7 states. [2019-09-07 11:16:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:20,910 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-09-07 11:16:20,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:16:20,911 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2019-09-07 11:16:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:20,912 INFO L225 Difference]: With dead ends: 68 [2019-09-07 11:16:20,912 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 11:16:20,913 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:16:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 11:16:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-09-07 11:16:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 11:16:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-09-07 11:16:20,922 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 58 [2019-09-07 11:16:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:20,924 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-09-07 11:16:20,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:16:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-09-07 11:16:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-07 11:16:20,927 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:20,927 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 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 11:16:20,927 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:20,928 INFO L82 PathProgramCache]: Analyzing trace with hash -515095459, now seen corresponding path program 4 times [2019-09-07 11:16:20,928 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:20,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:20,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:20,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:20,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-09-07 11:16:21,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:21,081 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:16:21,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:21,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:16:21,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:21,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:16:21,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-09-07 11:16:21,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:21,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 11:16:21,190 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:16:21,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:16:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:16:21,191 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2019-09-07 11:16:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:21,218 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2019-09-07 11:16:21,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:16:21,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2019-09-07 11:16:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:21,220 INFO L225 Difference]: With dead ends: 74 [2019-09-07 11:16:21,220 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 11:16:21,220 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:16:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 11:16:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-09-07 11:16:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 11:16:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-09-07 11:16:21,227 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 69 [2019-09-07 11:16:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:21,228 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-09-07 11:16:21,228 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:16:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-09-07 11:16:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-07 11:16:21,229 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:21,229 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 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 11:16:21,229 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:21,230 INFO L82 PathProgramCache]: Analyzing trace with hash 926983675, now seen corresponding path program 5 times [2019-09-07 11:16:21,230 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:21,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:21,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:21,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:21,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-07 11:16:21,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:21,317 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:16:21,332 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:21,423 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-07 11:16:21,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:21,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:16:21,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Stream closed [2019-09-07 11:16:21,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:21,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 11:16:21,491 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:16:21,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:16:21,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:16:21,492 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2019-09-07 11:16:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:21,519 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2019-09-07 11:16:21,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:16:21,520 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2019-09-07 11:16:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:21,521 INFO L225 Difference]: With dead ends: 77 [2019-09-07 11:16:21,521 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 11:16:21,522 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 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 11:16:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 11:16:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-09-07 11:16:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 11:16:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-09-07 11:16:21,527 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2019-09-07 11:16:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:21,528 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-09-07 11:16:21,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:16:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-09-07 11:16:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 11:16:21,529 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:21,529 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 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 11:16:21,529 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:21,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1632310970, now seen corresponding path program 6 times [2019-09-07 11:16:21,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:21,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:21,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:21,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:21,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-09-07 11:16:21,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:21,604 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 11:16:21,621 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:16:21,683 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 11:16:21,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:21,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:16:21,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 122 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2019-09-07 11:16:21,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:21,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 11:16:21,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 11:16:21,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 11:16:21,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:16:21,717 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2019-09-07 11:16:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:21,738 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2019-09-07 11:16:21,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 11:16:21,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2019-09-07 11:16:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:21,740 INFO L225 Difference]: With dead ends: 73 [2019-09-07 11:16:21,740 INFO L226 Difference]: Without dead ends: 50 [2019-09-07 11:16:21,740 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 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 11:16:21,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-07 11:16:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-09-07 11:16:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-07 11:16:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-09-07 11:16:21,752 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 80 [2019-09-07 11:16:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:21,753 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-09-07 11:16:21,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 11:16:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-09-07 11:16:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-07 11:16:21,754 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:21,754 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 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 11:16:21,754 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash -144412808, now seen corresponding path program 7 times [2019-09-07 11:16:21,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:21,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:21,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:21,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:21,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-09-07 11:16:21,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:21,846 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 11:16:21,863 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 11:16:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:21,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:16:21,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:16:21,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:21,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 11:16:21,945 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 11:16:21,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 11:16:21,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:16:21,946 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2019-09-07 11:16:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:21,982 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2019-09-07 11:16:21,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:16:21,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2019-09-07 11:16:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:21,984 INFO L225 Difference]: With dead ends: 86 [2019-09-07 11:16:21,984 INFO L226 Difference]: Without dead ends: 52 [2019-09-07 11:16:21,985 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:16:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-07 11:16:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-09-07 11:16:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 11:16:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-09-07 11:16:21,996 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 82 [2019-09-07 11:16:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:21,997 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-09-07 11:16:21,997 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 11:16:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-09-07 11:16:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-07 11:16:21,998 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:21,998 INFO L399 BasicCegarLoop]: trace histogram [12, 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 11:16:21,998 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:21,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:21,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1580736154, now seen corresponding path program 8 times [2019-09-07 11:16:21,999 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:21,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:22,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:22,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:22,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-09-07 11:16:22,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:22,079 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:16:22,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:22,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:16:22,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:22,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 11:16:22,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-09-07 11:16:22,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:22,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2019-09-07 11:16:22,260 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 11:16:22,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 11:16:22,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:16:22,261 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 13 states. [2019-09-07 11:16:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:22,332 INFO L93 Difference]: Finished difference Result 93 states and 115 transitions. [2019-09-07 11:16:22,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 11:16:22,333 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2019-09-07 11:16:22,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:22,334 INFO L225 Difference]: With dead ends: 93 [2019-09-07 11:16:22,334 INFO L226 Difference]: Without dead ends: 59 [2019-09-07 11:16:22,334 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:16:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-07 11:16:22,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-09-07 11:16:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-07 11:16:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-09-07 11:16:22,345 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 84 [2019-09-07 11:16:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:22,346 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-09-07 11:16:22,346 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 11:16:22,346 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-09-07 11:16:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 11:16:22,347 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:22,348 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 6, 6, 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 11:16:22,348 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2119079065, now seen corresponding path program 9 times [2019-09-07 11:16:22,349 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:22,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:22,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:22,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:22,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2019-09-07 11:16:22,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:22,444 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:16:22,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:22,545 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-07 11:16:22,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:22,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:16:22,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-07 11:16:22,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:22,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 11:16:22,589 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:16:22,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:16:22,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:16:22,590 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 7 states. [2019-09-07 11:16:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:22,623 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-09-07 11:16:22,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:16:22,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2019-09-07 11:16:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:22,625 INFO L225 Difference]: With dead ends: 85 [2019-09-07 11:16:22,625 INFO L226 Difference]: Without dead ends: 59 [2019-09-07 11:16:22,626 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 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 11:16:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-07 11:16:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-09-07 11:16:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-07 11:16:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2019-09-07 11:16:22,641 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 95 [2019-09-07 11:16:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:22,642 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2019-09-07 11:16:22,642 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:16:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2019-09-07 11:16:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 11:16:22,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:22,643 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 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 11:16:22,644 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:22,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2094467301, now seen corresponding path program 10 times [2019-09-07 11:16:22,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:22,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:22,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:22,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:22,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-09-07 11:16:22,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:22,769 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 11:16:22,783 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:16:22,841 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:16:22,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:22,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:16:22,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-09-07 11:16:22,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:22,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 11:16:22,934 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 11:16:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 11:16:22,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 11:16:22,936 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 15 states. [2019-09-07 11:16:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:23,008 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2019-09-07 11:16:23,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 11:16:23,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 97 [2019-09-07 11:16:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:23,010 INFO L225 Difference]: With dead ends: 105 [2019-09-07 11:16:23,011 INFO L226 Difference]: Without dead ends: 66 [2019-09-07 11:16:23,011 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 11:16:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-07 11:16:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2019-09-07 11:16:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-07 11:16:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2019-09-07 11:16:23,020 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 97 [2019-09-07 11:16:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:23,021 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2019-09-07 11:16:23,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 11:16:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2019-09-07 11:16:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-07 11:16:23,023 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:23,023 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 7, 7, 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 11:16:23,024 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash -127140932, now seen corresponding path program 11 times [2019-09-07 11:16:23,024 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:23,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:23,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:23,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:23,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2019-09-07 11:16:23,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:23,130 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:16:23,143 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:23,547 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-07 11:16:23,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:23,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:16:23,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2019-09-07 11:16:23,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:23,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-09-07 11:16:23,635 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 11:16:23,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 11:16:23,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 11:16:23,636 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 14 states. [2019-09-07 11:16:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:23,685 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2019-09-07 11:16:23,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 11:16:23,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 108 [2019-09-07 11:16:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:23,686 INFO L225 Difference]: With dead ends: 112 [2019-09-07 11:16:23,687 INFO L226 Difference]: Without dead ends: 71 [2019-09-07 11:16:23,687 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 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 11:16:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-07 11:16:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2019-09-07 11:16:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-07 11:16:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2019-09-07 11:16:23,692 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 108 [2019-09-07 11:16:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:23,692 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2019-09-07 11:16:23,692 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 11:16:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2019-09-07 11:16:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 11:16:23,694 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:23,694 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 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 11:16:23,694 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:23,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2132592357, now seen corresponding path program 12 times [2019-09-07 11:16:23,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:23,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:23,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:23,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:23,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2019-09-07 11:16:23,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:23,793 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:23,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:16:24,010 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 11:16:24,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:24,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 11:16:24,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 332 proven. 25 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-09-07 11:16:24,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:24,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 11:16:24,050 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 11:16:24,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 11:16:24,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 11:16:24,051 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 9 states. [2019-09-07 11:16:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:24,081 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2019-09-07 11:16:24,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 11:16:24,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 119 [2019-09-07 11:16:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:24,083 INFO L225 Difference]: With dead ends: 103 [2019-09-07 11:16:24,083 INFO L226 Difference]: Without dead ends: 71 [2019-09-07 11:16:24,084 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 11:16:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-07 11:16:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-09-07 11:16:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-07 11:16:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2019-09-07 11:16:24,088 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 119 [2019-09-07 11:16:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:24,089 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2019-09-07 11:16:24,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 11:16:24,089 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2019-09-07 11:16:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 11:16:24,090 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:24,090 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 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 11:16:24,091 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:24,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1943588451, now seen corresponding path program 13 times [2019-09-07 11:16:24,091 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:24,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:24,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:24,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:24,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2019-09-07 11:16:24,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:24,203 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:24,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:24,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 11:16:24,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2019-09-07 11:16:24,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:24,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 11:16:24,321 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 11:16:24,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 11:16:24,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:16:24,322 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 11 states. [2019-09-07 11:16:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:24,354 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2019-09-07 11:16:24,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 11:16:24,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 121 [2019-09-07 11:16:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:24,355 INFO L225 Difference]: With dead ends: 122 [2019-09-07 11:16:24,356 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 11:16:24,356 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:16:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 11:16:24,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-09-07 11:16:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 11:16:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2019-09-07 11:16:24,361 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 121 [2019-09-07 11:16:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:24,362 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2019-09-07 11:16:24,362 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 11:16:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2019-09-07 11:16:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 11:16:24,363 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:24,363 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 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 11:16:24,364 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:24,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash -141123525, now seen corresponding path program 14 times [2019-09-07 11:16:24,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:24,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:24,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:24,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:24,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-09-07 11:16:24,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:24,515 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) [2019-09-07 11:16:24,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:24,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:16:24,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:24,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 11:16:24,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (16)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:16:24,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:24,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-09-07 11:16:24,768 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 11:16:24,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 11:16:24,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:16:24,771 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 19 states. [2019-09-07 11:16:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:24,905 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2019-09-07 11:16:24,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 11:16:24,906 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 123 [2019-09-07 11:16:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:24,907 INFO L225 Difference]: With dead ends: 129 [2019-09-07 11:16:24,908 INFO L226 Difference]: Without dead ends: 80 [2019-09-07 11:16:24,908 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:16:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-07 11:16:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2019-09-07 11:16:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-07 11:16:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2019-09-07 11:16:24,915 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 123 [2019-09-07 11:16:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:24,916 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2019-09-07 11:16:24,916 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 11:16:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2019-09-07 11:16:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-07 11:16:24,917 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:24,917 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 9, 9, 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 11:16:24,918 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:24,918 INFO L82 PathProgramCache]: Analyzing trace with hash 40278300, now seen corresponding path program 15 times [2019-09-07 11:16:24,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:24,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:24,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:24,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:24,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2019-09-07 11:16:25,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:25,085 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 11:16:25,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:16:25,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-07 11:16:25,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:25,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:16:25,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 426 proven. 36 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2019-09-07 11:16:25,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:25,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 11:16:25,259 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 11:16:25,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 11:16:25,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:16:25,260 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 10 states. [2019-09-07 11:16:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:25,289 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2019-09-07 11:16:25,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 11:16:25,290 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2019-09-07 11:16:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:25,294 INFO L225 Difference]: With dead ends: 115 [2019-09-07 11:16:25,294 INFO L226 Difference]: Without dead ends: 80 [2019-09-07 11:16:25,295 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:16:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-07 11:16:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-09-07 11:16:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 11:16:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2019-09-07 11:16:25,299 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 134 [2019-09-07 11:16:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:25,299 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2019-09-07 11:16:25,300 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 11:16:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2019-09-07 11:16:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-07 11:16:25,301 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:25,301 INFO L399 BasicCegarLoop]: trace histogram [24, 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 11:16:25,302 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1272808538, now seen corresponding path program 16 times [2019-09-07 11:16:25,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:25,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:25,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:25,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:25,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-09-07 11:16:25,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:25,455 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:25,467 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:16:25,543 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:16:25,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:25,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 11:16:25,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 424 proven. 92 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-09-07 11:16:25,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:25,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 11:16:25,597 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 11:16:25,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 11:16:25,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:16:25,598 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 12 states. [2019-09-07 11:16:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:25,639 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2019-09-07 11:16:25,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 11:16:25,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2019-09-07 11:16:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:25,641 INFO L225 Difference]: With dead ends: 137 [2019-09-07 11:16:25,641 INFO L226 Difference]: Without dead ends: 84 [2019-09-07 11:16:25,643 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:16:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-07 11:16:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2019-09-07 11:16:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-07 11:16:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2019-09-07 11:16:25,651 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 136 [2019-09-07 11:16:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:25,651 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2019-09-07 11:16:25,652 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 11:16:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2019-09-07 11:16:25,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-07 11:16:25,653 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:25,653 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 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 11:16:25,653 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:25,654 INFO L82 PathProgramCache]: Analyzing trace with hash 773987643, now seen corresponding path program 17 times [2019-09-07 11:16:25,654 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:25,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:25,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:25,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:25,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1230 trivial. 0 not checked. [2019-09-07 11:16:25,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:25,818 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 11:16:25,838 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:16:26,832 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-07 11:16:26,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:26,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 11:16:26,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 526 proven. 117 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2019-09-07 11:16:26,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:26,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-09-07 11:16:26,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 11:16:26,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 11:16:26,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 11:16:26,981 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 20 states. [2019-09-07 11:16:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:27,064 INFO L93 Difference]: Finished difference Result 146 states and 177 transitions. [2019-09-07 11:16:27,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 11:16:27,065 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 145 [2019-09-07 11:16:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:27,066 INFO L225 Difference]: With dead ends: 146 [2019-09-07 11:16:27,066 INFO L226 Difference]: Without dead ends: 90 [2019-09-07 11:16:27,067 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 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 11:16:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-07 11:16:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-09-07 11:16:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-07 11:16:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2019-09-07 11:16:27,071 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 145 [2019-09-07 11:16:27,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:27,071 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2019-09-07 11:16:27,071 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 11:16:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2019-09-07 11:16:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-07 11:16:27,073 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:27,073 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 9, 9, 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 11:16:27,073 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:27,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1848547912, now seen corresponding path program 18 times [2019-09-07 11:16:27,074 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:27,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:27,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:27,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:27,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked. [2019-09-07 11:16:27,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:27,216 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:27,228 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:16:27,636 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-07 11:16:27,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:27,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 11:16:27,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 650 proven. 64 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-09-07 11:16:27,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:27,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-09-07 11:16:27,816 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 11:16:27,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 11:16:27,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 11:16:27,817 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 21 states. [2019-09-07 11:16:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:27,934 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2019-09-07 11:16:27,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 11:16:27,936 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 156 [2019-09-07 11:16:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:27,937 INFO L225 Difference]: With dead ends: 155 [2019-09-07 11:16:27,937 INFO L226 Difference]: Without dead ends: 93 [2019-09-07 11:16:27,939 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 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 11:16:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-07 11:16:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2019-09-07 11:16:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-07 11:16:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2019-09-07 11:16:27,946 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 156 [2019-09-07 11:16:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:27,946 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2019-09-07 11:16:27,946 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 11:16:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2019-09-07 11:16:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-07 11:16:27,950 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:27,951 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 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 11:16:27,951 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:27,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:27,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1889351576, now seen corresponding path program 19 times [2019-09-07 11:16:27,953 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:27,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:27,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:27,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:27,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2019-09-07 11:16:28,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:28,150 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 11:16:28,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:28,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 11:16:28,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2019-09-07 11:16:28,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:28,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 11:16:28,352 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 11:16:28,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 11:16:28,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 11:16:28,356 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand 14 states. [2019-09-07 11:16:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:28,416 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2019-09-07 11:16:28,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 11:16:28,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 160 [2019-09-07 11:16:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:28,419 INFO L225 Difference]: With dead ends: 158 [2019-09-07 11:16:28,420 INFO L226 Difference]: Without dead ends: 94 [2019-09-07 11:16:28,420 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 11:16:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-07 11:16:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-09-07 11:16:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-07 11:16:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2019-09-07 11:16:28,429 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 160 [2019-09-07 11:16:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:28,429 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2019-09-07 11:16:28,430 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 11:16:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2019-09-07 11:16:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-07 11:16:28,432 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:28,432 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 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 11:16:28,433 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:28,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:28,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1203195078, now seen corresponding path program 20 times [2019-09-07 11:16:28,433 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:28,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:28,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:28,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:28,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2019-09-07 11:16:28,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:28,644 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 11:16:28,657 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 11:16:28,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:16:28,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:28,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 11:16:28,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2019-09-07 11:16:28,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:28,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-09-07 11:16:28,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 11:16:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 11:16:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 11:16:28,918 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand 25 states. [2019-09-07 11:16:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:29,057 INFO L93 Difference]: Finished difference Result 165 states and 199 transitions. [2019-09-07 11:16:29,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 11:16:29,058 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 162 [2019-09-07 11:16:29,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:29,059 INFO L225 Difference]: With dead ends: 165 [2019-09-07 11:16:29,059 INFO L226 Difference]: Without dead ends: 101 [2019-09-07 11:16:29,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 11:16:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-07 11:16:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2019-09-07 11:16:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-07 11:16:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2019-09-07 11:16:29,067 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 162 [2019-09-07 11:16:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:29,067 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2019-09-07 11:16:29,067 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 11:16:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2019-09-07 11:16:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-09-07 11:16:29,070 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:29,070 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 33, 12, 12, 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 11:16:29,070 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash 228631673, now seen corresponding path program 21 times [2019-09-07 11:16:29,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:29,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:29,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:29,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:29,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1842 trivial. 0 not checked. [2019-09-07 11:16:29,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:29,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:16:29,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:29,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-09-07 11:16:29,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:29,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 11:16:29,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 780 proven. 81 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2019-09-07 11:16:29,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:29,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 11:16:29,548 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 11:16:29,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 11:16:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:16:29,549 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand 13 states. [2019-09-07 11:16:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:29,586 INFO L93 Difference]: Finished difference Result 145 states and 172 transitions. [2019-09-07 11:16:29,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 11:16:29,591 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 173 [2019-09-07 11:16:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:29,592 INFO L225 Difference]: With dead ends: 145 [2019-09-07 11:16:29,593 INFO L226 Difference]: Without dead ends: 101 [2019-09-07 11:16:29,593 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:16:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-07 11:16:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-09-07 11:16:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-07 11:16:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2019-09-07 11:16:29,597 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 173 [2019-09-07 11:16:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:29,598 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2019-09-07 11:16:29,598 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 11:16:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2019-09-07 11:16:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-07 11:16:29,599 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:29,599 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 33, 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 11:16:29,600 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1870005637, now seen corresponding path program 22 times [2019-09-07 11:16:29,600 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:29,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:29,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:29,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:29,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1942 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2019-09-07 11:16:29,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:29,780 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) [2019-09-07 11:16:29,792 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:29,882 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:16:29,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:29,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 11:16:29,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1942 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1798 trivial. 0 not checked. [2019-09-07 11:16:30,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:30,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2019-09-07 11:16:30,091 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 11:16:30,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 11:16:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:16:30,092 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand 27 states. [2019-09-07 11:16:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:30,213 INFO L93 Difference]: Finished difference Result 177 states and 213 transitions. [2019-09-07 11:16:30,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 11:16:30,223 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 175 [2019-09-07 11:16:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:30,224 INFO L225 Difference]: With dead ends: 177 [2019-09-07 11:16:30,224 INFO L226 Difference]: Without dead ends: 108 [2019-09-07 11:16:30,225 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:16:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-07 11:16:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2019-09-07 11:16:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-07 11:16:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2019-09-07 11:16:30,230 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 175 [2019-09-07 11:16:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:30,230 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2019-09-07 11:16:30,230 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 11:16:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2019-09-07 11:16:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-07 11:16:30,232 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:30,232 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 36, 13, 13, 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 11:16:30,232 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:30,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash -963892260, now seen corresponding path program 23 times [2019-09-07 11:16:30,233 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:30,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:30,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:30,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:30,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2182 trivial. 0 not checked. [2019-09-07 11:16:30,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:30,460 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 11:16:30,476 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 11:16:33,399 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-07 11:16:33,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:33,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 11:16:33,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 916 proven. 210 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2019-09-07 11:16:33,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:33,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2019-09-07 11:16:33,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 11:16:33,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 11:16:33,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:16:33,615 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 26 states. [2019-09-07 11:16:33,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:33,707 INFO L93 Difference]: Finished difference Result 184 states and 221 transitions. [2019-09-07 11:16:33,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 11:16:33,708 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 186 [2019-09-07 11:16:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:33,708 INFO L225 Difference]: With dead ends: 184 [2019-09-07 11:16:33,708 INFO L226 Difference]: Without dead ends: 113 [2019-09-07 11:16:33,709 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:16:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-09-07 11:16:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2019-09-07 11:16:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-07 11:16:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2019-09-07 11:16:33,713 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 186 [2019-09-07 11:16:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:33,714 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2019-09-07 11:16:33,714 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 11:16:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2019-09-07 11:16:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-09-07 11:16:33,715 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:33,715 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 39, 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 11:16:33,715 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash 622062971, now seen corresponding path program 24 times [2019-09-07 11:16:33,716 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:33,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:33,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:33,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:33,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2645 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2019-09-07 11:16:33,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:33,899 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 11:16:33,918 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 11:16:34,591 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-07 11:16:34,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:34,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 11:16:34,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2645 backedges. 1076 proven. 121 refuted. 0 times theorem prover too weak. 1448 trivial. 0 not checked. [2019-09-07 11:16:34,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:34,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 11:16:34,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 11:16:34,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 11:16:34,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 11:16:34,669 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand 15 states. [2019-09-07 11:16:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:34,712 INFO L93 Difference]: Finished difference Result 163 states and 194 transitions. [2019-09-07 11:16:34,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 11:16:34,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2019-09-07 11:16:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:34,715 INFO L225 Difference]: With dead ends: 163 [2019-09-07 11:16:34,715 INFO L226 Difference]: Without dead ends: 113 [2019-09-07 11:16:34,715 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 11:16:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-09-07 11:16:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-09-07 11:16:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-07 11:16:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2019-09-07 11:16:34,722 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 197 [2019-09-07 11:16:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:34,722 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2019-09-07 11:16:34,722 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 11:16:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2019-09-07 11:16:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-09-07 11:16:34,726 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:34,726 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 39, 13, 13, 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 11:16:34,727 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1425086845, now seen corresponding path program 25 times [2019-09-07 11:16:34,727 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:34,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:34,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:34,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:34,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2668 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2499 trivial. 0 not checked. [2019-09-07 11:16:34,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:34,941 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:34,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:35,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 11:16:35,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2668 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2499 trivial. 0 not checked. [2019-09-07 11:16:35,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:35,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 11:16:35,092 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 11:16:35,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 11:16:35,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 11:16:35,093 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand 17 states. [2019-09-07 11:16:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:35,179 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2019-09-07 11:16:35,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 11:16:35,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 199 [2019-09-07 11:16:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:35,182 INFO L225 Difference]: With dead ends: 194 [2019-09-07 11:16:35,182 INFO L226 Difference]: Without dead ends: 115 [2019-09-07 11:16:35,183 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 11:16:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-07 11:16:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-09-07 11:16:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-07 11:16:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2019-09-07 11:16:35,188 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 199 [2019-09-07 11:16:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:35,188 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2019-09-07 11:16:35,188 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 11:16:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2019-09-07 11:16:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-09-07 11:16:35,189 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:35,190 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 39, 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 11:16:35,190 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:35,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1768707173, now seen corresponding path program 26 times [2019-09-07 11:16:35,190 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:35,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:35,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:35,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:35,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2695 backedges. 0 proven. 1321 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2019-09-07 11:16:35,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:35,442 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:35,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:16:35,550 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:16:35,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:35,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 11:16:35,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2695 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2499 trivial. 0 not checked. [2019-09-07 11:16:35,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:35,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-09-07 11:16:35,855 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 11:16:35,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 11:16:35,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:16:35,856 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand 31 states. [2019-09-07 11:16:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:35,952 INFO L93 Difference]: Finished difference Result 201 states and 241 transitions. [2019-09-07 11:16:35,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 11:16:35,952 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 201 [2019-09-07 11:16:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:35,953 INFO L225 Difference]: With dead ends: 201 [2019-09-07 11:16:35,953 INFO L226 Difference]: Without dead ends: 122 [2019-09-07 11:16:35,954 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:16:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-07 11:16:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2019-09-07 11:16:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-09-07 11:16:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2019-09-07 11:16:35,959 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 201 [2019-09-07 11:16:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:35,960 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2019-09-07 11:16:35,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 11:16:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2019-09-07 11:16:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-09-07 11:16:35,961 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:35,961 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 42, 15, 15, 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 11:16:35,961 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:35,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2114134332, now seen corresponding path program 27 times [2019-09-07 11:16:35,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:35,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:35,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:35,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:35,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3093 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2949 trivial. 0 not checked. [2019-09-07 11:16:36,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:36,149 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:36,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:16:37,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-09-07 11:16:37,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:37,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 11:16:37,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3093 backedges. 1242 proven. 144 refuted. 0 times theorem prover too weak. 1707 trivial. 0 not checked. [2019-09-07 11:16:37,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:37,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 11:16:37,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 11:16:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 11:16:37,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:16:37,289 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand 16 states. [2019-09-07 11:16:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:37,335 INFO L93 Difference]: Finished difference Result 175 states and 208 transitions. [2019-09-07 11:16:37,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 11:16:37,336 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 212 [2019-09-07 11:16:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:37,337 INFO L225 Difference]: With dead ends: 175 [2019-09-07 11:16:37,337 INFO L226 Difference]: Without dead ends: 122 [2019-09-07 11:16:37,339 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:16:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-07 11:16:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-09-07 11:16:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 11:16:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2019-09-07 11:16:37,349 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 212 [2019-09-07 11:16:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:37,350 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2019-09-07 11:16:37,350 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 11:16:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2019-09-07 11:16:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-09-07 11:16:37,351 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:37,351 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 42, 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 11:16:37,352 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash 210110714, now seen corresponding path program 28 times [2019-09-07 11:16:37,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:37,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:37,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:37,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:37,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3118 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1591 trivial. 0 not checked. [2019-09-07 11:16:37,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:37,597 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:37,617 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:16:37,755 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:16:37,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:37,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 11:16:37,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3118 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2893 trivial. 0 not checked. [2019-09-07 11:16:38,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:38,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-09-07 11:16:38,098 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 11:16:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 11:16:38,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 11:16:38,099 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand 33 states. [2019-09-07 11:16:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:38,213 INFO L93 Difference]: Finished difference Result 213 states and 255 transitions. [2019-09-07 11:16:38,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 11:16:38,213 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 214 [2019-09-07 11:16:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:38,214 INFO L225 Difference]: With dead ends: 213 [2019-09-07 11:16:38,214 INFO L226 Difference]: Without dead ends: 129 [2019-09-07 11:16:38,217 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 11:16:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-07 11:16:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-09-07 11:16:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-07 11:16:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2019-09-07 11:16:38,229 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 214 [2019-09-07 11:16:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:38,229 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2019-09-07 11:16:38,229 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 11:16:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2019-09-07 11:16:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-09-07 11:16:38,232 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:38,233 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 45, 16, 16, 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 11:16:38,233 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash -740265543, now seen corresponding path program 29 times [2019-09-07 11:16:38,233 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:38,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:38,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:38,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:38,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3545 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 3376 trivial. 0 not checked. [2019-09-07 11:16:38,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:38,474 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) [2019-09-07 11:16:38,496 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:45,010 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-07 11:16:45,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:45,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 11:16:45,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3545 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1801 trivial. 0 not checked. [2019-09-07 11:16:45,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:45,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2019-09-07 11:16:45,300 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 11:16:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 11:16:45,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2019-09-07 11:16:45,301 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand 32 states. [2019-09-07 11:16:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:45,423 INFO L93 Difference]: Finished difference Result 220 states and 263 transitions. [2019-09-07 11:16:45,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 11:16:45,424 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 225 [2019-09-07 11:16:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:45,425 INFO L225 Difference]: With dead ends: 220 [2019-09-07 11:16:45,425 INFO L226 Difference]: Without dead ends: 134 [2019-09-07 11:16:45,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2019-09-07 11:16:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-09-07 11:16:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2019-09-07 11:16:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 11:16:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2019-09-07 11:16:45,434 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 225 [2019-09-07 11:16:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:45,434 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2019-09-07 11:16:45,435 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 11:16:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2019-09-07 11:16:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-09-07 11:16:45,437 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:45,437 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 48, 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 11:16:45,437 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:45,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1692019206, now seen corresponding path program 30 times [2019-09-07 11:16:45,438 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:45,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:45,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:45,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:45,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2019-09-07 11:16:45,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:45,734 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) [2019-09-07 11:16:45,748 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:46,849 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-07 11:16:46,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:46,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 11:16:46,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1610 proven. 196 refuted. 0 times theorem prover too weak. 2189 trivial. 0 not checked. [2019-09-07 11:16:46,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:46,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 11:16:46,911 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 11:16:46,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 11:16:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 11:16:46,912 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand 18 states. [2019-09-07 11:16:46,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:46,959 INFO L93 Difference]: Finished difference Result 193 states and 230 transitions. [2019-09-07 11:16:46,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 11:16:46,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 236 [2019-09-07 11:16:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:46,960 INFO L225 Difference]: With dead ends: 193 [2019-09-07 11:16:46,960 INFO L226 Difference]: Without dead ends: 134 [2019-09-07 11:16:46,961 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 11:16:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-09-07 11:16:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-09-07 11:16:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-09-07 11:16:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2019-09-07 11:16:46,966 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 236 [2019-09-07 11:16:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:46,966 INFO L475 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2019-09-07 11:16:46,966 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 11:16:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2019-09-07 11:16:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-09-07 11:16:46,968 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:46,968 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 48, 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 11:16:46,968 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:46,969 INFO L82 PathProgramCache]: Analyzing trace with hash -296433736, now seen corresponding path program 31 times [2019-09-07 11:16:46,969 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:46,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:46,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:46,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:46,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4024 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 3768 trivial. 0 not checked. [2019-09-07 11:16:47,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:47,214 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 11:16:47,232 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 11:16:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:47,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 11:16:47,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4024 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 3768 trivial. 0 not checked. [2019-09-07 11:16:47,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:47,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 11:16:47,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 11:16:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 11:16:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 11:16:47,397 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand 20 states. [2019-09-07 11:16:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:47,450 INFO L93 Difference]: Finished difference Result 230 states and 270 transitions. [2019-09-07 11:16:47,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 11:16:47,450 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 238 [2019-09-07 11:16:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:47,451 INFO L225 Difference]: With dead ends: 230 [2019-09-07 11:16:47,451 INFO L226 Difference]: Without dead ends: 136 [2019-09-07 11:16:47,452 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 11:16:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-09-07 11:16:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2019-09-07 11:16:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-07 11:16:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 155 transitions. [2019-09-07 11:16:47,457 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 155 transitions. Word has length 238 [2019-09-07 11:16:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:47,457 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 155 transitions. [2019-09-07 11:16:47,457 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 11:16:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 155 transitions. [2019-09-07 11:16:47,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-09-07 11:16:47,458 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:47,459 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 48, 17, 17, 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 11:16:47,459 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1129590746, now seen corresponding path program 32 times [2019-09-07 11:16:47,459 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:47,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:47,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:47,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:16:47,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4057 backedges. 0 proven. 1984 refuted. 0 times theorem prover too weak. 2073 trivial. 0 not checked. [2019-09-07 11:16:47,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:47,813 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 11:16:47,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:16:47,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:16:48,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:48,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 11:16:48,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4057 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 3768 trivial. 0 not checked. [2019-09-07 11:16:48,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:48,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2019-09-07 11:16:48,549 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 11:16:48,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 11:16:48,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 11:16:48,550 INFO L87 Difference]: Start difference. First operand 135 states and 155 transitions. Second operand 37 states. [2019-09-07 11:16:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:48,695 INFO L93 Difference]: Finished difference Result 237 states and 283 transitions. [2019-09-07 11:16:48,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 11:16:48,695 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 240 [2019-09-07 11:16:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:48,697 INFO L225 Difference]: With dead ends: 237 [2019-09-07 11:16:48,697 INFO L226 Difference]: Without dead ends: 143 [2019-09-07 11:16:48,698 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 11:16:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-07 11:16:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2019-09-07 11:16:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-07 11:16:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 161 transitions. [2019-09-07 11:16:48,705 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 161 transitions. Word has length 240 [2019-09-07 11:16:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:48,705 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 161 transitions. [2019-09-07 11:16:48,705 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 11:16:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 161 transitions. [2019-09-07 11:16:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-09-07 11:16:48,707 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:48,707 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 51, 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 11:16:48,707 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1674924967, now seen corresponding path program 33 times [2019-09-07 11:16:48,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:48,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:48,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:48,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:48,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4317 trivial. 0 not checked. [2019-09-07 11:16:48,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:48,974 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 11:16:48,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:16:51,043 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-09-07 11:16:51,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:51,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 11:16:51,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 1812 proven. 225 refuted. 0 times theorem prover too weak. 2505 trivial. 0 not checked. [2019-09-07 11:16:51,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:51,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 11:16:51,086 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 11:16:51,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 11:16:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:16:51,087 INFO L87 Difference]: Start difference. First operand 140 states and 161 transitions. Second operand 19 states. [2019-09-07 11:16:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:51,152 INFO L93 Difference]: Finished difference Result 205 states and 244 transitions. [2019-09-07 11:16:51,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 11:16:51,153 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 251 [2019-09-07 11:16:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:51,154 INFO L225 Difference]: With dead ends: 205 [2019-09-07 11:16:51,154 INFO L226 Difference]: Without dead ends: 143 [2019-09-07 11:16:51,154 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:16:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-07 11:16:51,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-09-07 11:16:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 11:16:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2019-09-07 11:16:51,159 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 251 [2019-09-07 11:16:51,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:51,161 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2019-09-07 11:16:51,162 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 11:16:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2019-09-07 11:16:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-09-07 11:16:51,163 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:51,163 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 51, 18, 18, 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 11:16:51,164 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:51,164 INFO L82 PathProgramCache]: Analyzing trace with hash -330230309, now seen corresponding path program 34 times [2019-09-07 11:16:51,164 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:51,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:51,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:51,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:51,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4573 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 2338 trivial. 0 not checked. [2019-09-07 11:16:51,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:51,553 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:16:51,574 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:16:51,752 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:16:51,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:16:51,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 11:16:51,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:16:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4573 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4249 trivial. 0 not checked. [2019-09-07 11:16:52,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:16:52,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2019-09-07 11:16:52,256 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 11:16:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 11:16:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 11:16:52,257 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand 39 states. [2019-09-07 11:16:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:16:52,403 INFO L93 Difference]: Finished difference Result 249 states and 297 transitions. [2019-09-07 11:16:52,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 11:16:52,405 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 253 [2019-09-07 11:16:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:16:52,406 INFO L225 Difference]: With dead ends: 249 [2019-09-07 11:16:52,406 INFO L226 Difference]: Without dead ends: 150 [2019-09-07 11:16:52,408 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 11:16:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-09-07 11:16:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2019-09-07 11:16:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-09-07 11:16:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2019-09-07 11:16:52,415 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 253 [2019-09-07 11:16:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:16:52,415 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2019-09-07 11:16:52,415 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 11:16:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2019-09-07 11:16:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-09-07 11:16:52,417 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:16:52,417 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 54, 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 11:16:52,417 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:16:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:16:52,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1966564348, now seen corresponding path program 35 times [2019-09-07 11:16:52,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:16:52,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:16:52,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:52,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:16:52,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:16:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:16:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5087 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4831 trivial. 0 not checked. [2019-09-07 11:16:52,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:16:52,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:16:52,753 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:17:18,323 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-09-07 11:17:18,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:17:18,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 11:17:18,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:17:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5087 backedges. 2020 proven. 477 refuted. 0 times theorem prover too weak. 2590 trivial. 0 not checked. [2019-09-07 11:17:18,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:17:18,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2019-09-07 11:17:18,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 11:17:18,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 11:17:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 11:17:18,717 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand 38 states. [2019-09-07 11:17:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:17:18,843 INFO L93 Difference]: Finished difference Result 256 states and 305 transitions. [2019-09-07 11:17:18,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 11:17:18,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 264 [2019-09-07 11:17:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:17:18,845 INFO L225 Difference]: With dead ends: 256 [2019-09-07 11:17:18,845 INFO L226 Difference]: Without dead ends: 155 [2019-09-07 11:17:18,846 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 11:17:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-09-07 11:17:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2019-09-07 11:17:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-09-07 11:17:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 175 transitions. [2019-09-07 11:17:18,851 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 175 transitions. Word has length 264 [2019-09-07 11:17:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:17:18,851 INFO L475 AbstractCegarLoop]: Abstraction has 152 states and 175 transitions. [2019-09-07 11:17:18,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 11:17:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 175 transitions. [2019-09-07 11:17:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-09-07 11:17:18,853 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:17:18,853 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 57, 19, 19, 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 11:17:18,854 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:17:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:17:18,854 INFO L82 PathProgramCache]: Analyzing trace with hash 814660059, now seen corresponding path program 36 times [2019-09-07 11:17:18,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:17:18,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:17:18,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:18,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:17:18,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:17:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5624 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2019-09-07 11:17:19,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:17:19,177 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 11:17:19,210 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 11:17:22,858 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-07 11:17:22,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:17:22,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 11:17:22,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:17:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5624 backedges. 2252 proven. 289 refuted. 0 times theorem prover too weak. 3083 trivial. 0 not checked. [2019-09-07 11:17:22,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:17:22,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 11:17:22,947 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 11:17:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 11:17:22,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 11:17:22,948 INFO L87 Difference]: Start difference. First operand 152 states and 175 transitions. Second operand 21 states. [2019-09-07 11:17:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:17:23,004 INFO L93 Difference]: Finished difference Result 223 states and 266 transitions. [2019-09-07 11:17:23,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 11:17:23,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 275 [2019-09-07 11:17:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:17:23,007 INFO L225 Difference]: With dead ends: 223 [2019-09-07 11:17:23,007 INFO L226 Difference]: Without dead ends: 155 [2019-09-07 11:17:23,007 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 11:17:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-09-07 11:17:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2019-09-07 11:17:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-07 11:17:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2019-09-07 11:17:23,012 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 275 [2019-09-07 11:17:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:17:23,013 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2019-09-07 11:17:23,013 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 11:17:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2019-09-07 11:17:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2019-09-07 11:17:23,014 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:17:23,015 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 57, 19, 19, 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 11:17:23,015 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:17:23,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:17:23,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1231865507, now seen corresponding path program 37 times [2019-09-07 11:17:23,015 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:17:23,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:17:23,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:23,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:17:23,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:17:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5659 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5298 trivial. 0 not checked. [2019-09-07 11:17:23,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:17:23,359 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 11:17:23,375 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 11:17:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:17:23,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 11:17:23,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:17:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5659 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5298 trivial. 0 not checked. [2019-09-07 11:17:23,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:17:23,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 11:17:23,575 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 11:17:23,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 11:17:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:17:23,576 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand 23 states. [2019-09-07 11:17:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:17:23,639 INFO L93 Difference]: Finished difference Result 266 states and 312 transitions. [2019-09-07 11:17:23,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 11:17:23,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 277 [2019-09-07 11:17:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:17:23,640 INFO L225 Difference]: With dead ends: 266 [2019-09-07 11:17:23,640 INFO L226 Difference]: Without dead ends: 157 [2019-09-07 11:17:23,641 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:17:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-07 11:17:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2019-09-07 11:17:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-07 11:17:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2019-09-07 11:17:23,646 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 277 [2019-09-07 11:17:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:17:23,646 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2019-09-07 11:17:23,646 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 11:17:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2019-09-07 11:17:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-09-07 11:17:23,649 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:17:23,650 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 57, 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 11:17:23,650 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:17:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:17:23,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1937191173, now seen corresponding path program 38 times [2019-09-07 11:17:23,651 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:17:23,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:17:23,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:23,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:17:23,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:17:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5698 backedges. 0 proven. 2782 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2019-09-07 11:17:24,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:17:24,078 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) [2019-09-07 11:17:24,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:17:24,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:17:24,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:17:24,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 11:17:24,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:17:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5698 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5298 trivial. 0 not checked. [2019-09-07 11:17:24,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:17:24,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2019-09-07 11:17:24,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-07 11:17:24,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-07 11:17:24,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 11:17:24,783 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand 43 states. [2019-09-07 11:17:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:17:24,966 INFO L93 Difference]: Finished difference Result 273 states and 325 transitions. [2019-09-07 11:17:24,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-07 11:17:24,966 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 279 [2019-09-07 11:17:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:17:24,967 INFO L225 Difference]: With dead ends: 273 [2019-09-07 11:17:24,967 INFO L226 Difference]: Without dead ends: 164 [2019-09-07 11:17:24,968 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 11:17:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-07 11:17:24,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2019-09-07 11:17:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-07 11:17:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 185 transitions. [2019-09-07 11:17:24,974 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 185 transitions. Word has length 279 [2019-09-07 11:17:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:17:24,974 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 185 transitions. [2019-09-07 11:17:24,974 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-07 11:17:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 185 transitions. [2019-09-07 11:17:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2019-09-07 11:17:24,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:17:24,977 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 60, 21, 21, 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 11:17:24,977 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:17:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:17:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 792768860, now seen corresponding path program 39 times [2019-09-07 11:17:24,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:17:24,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:17:24,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:24,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:17:24,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:17:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6270 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5946 trivial. 0 not checked. [2019-09-07 11:17:25,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:17:25,407 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) [2019-09-07 11:17:25,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:17:29,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-09-07 11:17:29,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:17:29,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-07 11:17:29,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:17:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6270 backedges. 2531 proven. 324 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (41)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:17:29,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:17:29,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 24 [2019-09-07 11:17:29,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 11:17:29,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 11:17:29,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2019-09-07 11:17:29,178 INFO L87 Difference]: Start difference. First operand 161 states and 185 transitions. Second operand 24 states. [2019-09-07 11:17:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:17:29,545 INFO L93 Difference]: Finished difference Result 235 states and 280 transitions. [2019-09-07 11:17:29,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 11:17:29,545 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 290 [2019-09-07 11:17:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:17:29,546 INFO L225 Difference]: With dead ends: 235 [2019-09-07 11:17:29,547 INFO L226 Difference]: Without dead ends: 164 [2019-09-07 11:17:29,548 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=655, Invalid=1151, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 11:17:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-07 11:17:29,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-09-07 11:17:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-09-07 11:17:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 187 transitions. [2019-09-07 11:17:29,553 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 187 transitions. Word has length 290 [2019-09-07 11:17:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:17:29,554 INFO L475 AbstractCegarLoop]: Abstraction has 163 states and 187 transitions. [2019-09-07 11:17:29,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 11:17:29,554 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 187 transitions. [2019-09-07 11:17:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-09-07 11:17:29,556 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:17:29,556 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 60, 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 11:17:29,556 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:17:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:17:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1157985690, now seen corresponding path program 40 times [2019-09-07 11:17:29,557 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:17:29,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:17:29,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:29,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:17:29,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:17:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6307 backedges. 0 proven. 3078 refuted. 0 times theorem prover too weak. 3229 trivial. 0 not checked. [2019-09-07 11:17:29,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:17:29,948 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) [2019-09-07 11:17:29,961 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:17:30,099 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:17:30,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:17:30,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 11:17:30,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:17:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6307 backedges. 2488 proven. 590 refuted. 0 times theorem prover too weak. 3229 trivial. 0 not checked. [2019-09-07 11:17:30,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:17:30,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 11:17:30,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 11:17:30,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 11:17:30,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 11:17:30,202 INFO L87 Difference]: Start difference. First operand 163 states and 187 transitions. Second operand 24 states. [2019-09-07 11:17:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:17:30,260 INFO L93 Difference]: Finished difference Result 281 states and 333 transitions. [2019-09-07 11:17:30,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 11:17:30,261 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 292 [2019-09-07 11:17:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:17:30,262 INFO L225 Difference]: With dead ends: 281 [2019-09-07 11:17:30,262 INFO L226 Difference]: Without dead ends: 168 [2019-09-07 11:17:30,263 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 11:17:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-09-07 11:17:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2019-09-07 11:17:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-09-07 11:17:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2019-09-07 11:17:30,277 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 292 [2019-09-07 11:17:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:17:30,278 INFO L475 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2019-09-07 11:17:30,278 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 11:17:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2019-09-07 11:17:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-09-07 11:17:30,281 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:17:30,281 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 63, 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 11:17:30,281 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:17:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:17:30,281 INFO L82 PathProgramCache]: Analyzing trace with hash 935308795, now seen corresponding path program 41 times [2019-09-07 11:17:30,282 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:17:30,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:17:30,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:30,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:17:30,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:17:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:17:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6865 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 6504 trivial. 0 not checked. [2019-09-07 11:17:30,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:17:30,676 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) [2019-09-07 11:17:30,688 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:18:26,795 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-09-07 11:18:26,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:26,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 11:18:26,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6865 backedges. 2734 proven. 651 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2019-09-07 11:18:27,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:27,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2019-09-07 11:18:27,385 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 11:18:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 11:18:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 11:18:27,386 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand 44 states. [2019-09-07 11:18:27,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:27,560 INFO L93 Difference]: Finished difference Result 290 states and 345 transitions. [2019-09-07 11:18:27,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 11:18:27,565 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 301 [2019-09-07 11:18:27,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:27,566 INFO L225 Difference]: With dead ends: 290 [2019-09-07 11:18:27,566 INFO L226 Difference]: Without dead ends: 174 [2019-09-07 11:18:27,567 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 11:18:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-09-07 11:18:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2019-09-07 11:18:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-09-07 11:18:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 197 transitions. [2019-09-07 11:18:27,574 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 197 transitions. Word has length 301 [2019-09-07 11:18:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:27,574 INFO L475 AbstractCegarLoop]: Abstraction has 171 states and 197 transitions. [2019-09-07 11:18:27,574 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 11:18:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 197 transitions. [2019-09-07 11:18:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-09-07 11:18:27,576 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:27,576 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 66, 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 11:18:27,577 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1077378040, now seen corresponding path program 42 times [2019-09-07 11:18:27,577 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:27,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:27,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:27,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:27,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7489 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7048 trivial. 0 not checked. [2019-09-07 11:18:28,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:28,075 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 11:18:28,086 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:18:32,568 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-07 11:18:32,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:32,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 11:18:32,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7489 backedges. 3002 proven. 400 refuted. 0 times theorem prover too weak. 4087 trivial. 0 not checked. [2019-09-07 11:18:33,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:33,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2019-09-07 11:18:33,263 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-07 11:18:33,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-07 11:18:33,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 11:18:33,264 INFO L87 Difference]: Start difference. First operand 171 states and 197 transitions. Second operand 45 states. [2019-09-07 11:18:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:33,447 INFO L93 Difference]: Finished difference Result 299 states and 352 transitions. [2019-09-07 11:18:33,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-07 11:18:33,448 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 312 [2019-09-07 11:18:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:33,449 INFO L225 Difference]: With dead ends: 299 [2019-09-07 11:18:33,449 INFO L226 Difference]: Without dead ends: 177 [2019-09-07 11:18:33,451 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 11:18:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-09-07 11:18:33,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2019-09-07 11:18:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-09-07 11:18:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2019-09-07 11:18:33,457 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 312 [2019-09-07 11:18:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:33,458 INFO L475 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2019-09-07 11:18:33,458 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-07 11:18:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2019-09-07 11:18:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-09-07 11:18:33,460 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:33,460 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 66, 22, 22, 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 11:18:33,460 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:33,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:33,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1915936808, now seen corresponding path program 43 times [2019-09-07 11:18:33,461 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:33,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:33,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:33,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:33,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7573 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7089 trivial. 0 not checked. [2019-09-07 11:18:33,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:33,868 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 11:18:33,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:18:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:34,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 11:18:34,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7573 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7089 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (45)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:18:34,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:34,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 11:18:34,109 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 11:18:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 11:18:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:18:34,110 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand 26 states. [2019-09-07 11:18:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:34,184 INFO L93 Difference]: Finished difference Result 302 states and 354 transitions. [2019-09-07 11:18:34,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 11:18:34,184 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 316 [2019-09-07 11:18:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:34,185 INFO L225 Difference]: With dead ends: 302 [2019-09-07 11:18:34,185 INFO L226 Difference]: Without dead ends: 178 [2019-09-07 11:18:34,186 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:18:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-09-07 11:18:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2019-09-07 11:18:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-07 11:18:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2019-09-07 11:18:34,191 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 316 [2019-09-07 11:18:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:34,192 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2019-09-07 11:18:34,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 11:18:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2019-09-07 11:18:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2019-09-07 11:18:34,193 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:34,194 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 66, 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 11:18:34,194 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:34,194 INFO L82 PathProgramCache]: Analyzing trace with hash -807103366, now seen corresponding path program 44 times [2019-09-07 11:18:34,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:34,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:34,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:18:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7618 backedges. 0 proven. 3715 refuted. 0 times theorem prover too weak. 3903 trivial. 0 not checked. [2019-09-07 11:18:34,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:34,826 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 11:18:34,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:18:35,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:18:35,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:35,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 11:18:35,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7618 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 7089 trivial. 0 not checked. [2019-09-07 11:18:35,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:35,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2019-09-07 11:18:35,552 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-07 11:18:35,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-07 11:18:35,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2019-09-07 11:18:35,553 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand 49 states. [2019-09-07 11:18:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:35,725 INFO L93 Difference]: Finished difference Result 309 states and 367 transitions. [2019-09-07 11:18:35,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-07 11:18:35,726 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 318 [2019-09-07 11:18:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:35,727 INFO L225 Difference]: With dead ends: 309 [2019-09-07 11:18:35,727 INFO L226 Difference]: Without dead ends: 185 [2019-09-07 11:18:35,728 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2019-09-07 11:18:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-09-07 11:18:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2019-09-07 11:18:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-09-07 11:18:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 209 transitions. [2019-09-07 11:18:35,735 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 209 transitions. Word has length 318 [2019-09-07 11:18:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:35,735 INFO L475 AbstractCegarLoop]: Abstraction has 182 states and 209 transitions. [2019-09-07 11:18:35,735 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-07 11:18:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 209 transitions. [2019-09-07 11:18:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2019-09-07 11:18:35,737 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:35,737 INFO L399 BasicCegarLoop]: trace histogram [69, 69, 69, 24, 24, 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 11:18:35,738 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:35,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:35,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1567271993, now seen corresponding path program 45 times [2019-09-07 11:18:35,738 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:35,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:35,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:35,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:35,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8277 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7836 trivial. 0 not checked. [2019-09-07 11:18:36,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:36,141 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 11:18:36,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:18:48,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2019-09-07 11:18:48,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:48,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-07 11:18:48,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8277 backedges. 3323 proven. 441 refuted. 0 times theorem prover too weak. 4513 trivial. 0 not checked. [2019-09-07 11:18:48,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:48,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 27 [2019-09-07 11:18:48,669 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 11:18:48,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 11:18:48,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:18:48,670 INFO L87 Difference]: Start difference. First operand 182 states and 209 transitions. Second operand 27 states. [2019-09-07 11:18:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:49,116 INFO L93 Difference]: Finished difference Result 265 states and 316 transitions. [2019-09-07 11:18:49,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 11:18:49,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 329 [2019-09-07 11:18:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:49,119 INFO L225 Difference]: With dead ends: 265 [2019-09-07 11:18:49,119 INFO L226 Difference]: Without dead ends: 185 [2019-09-07 11:18:49,121 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=1496, Unknown=0, NotChecked=0, Total=2352 [2019-09-07 11:18:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-09-07 11:18:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2019-09-07 11:18:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-09-07 11:18:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 211 transitions. [2019-09-07 11:18:49,129 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 211 transitions. Word has length 329 [2019-09-07 11:18:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:49,129 INFO L475 AbstractCegarLoop]: Abstraction has 184 states and 211 transitions. [2019-09-07 11:18:49,129 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 11:18:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 211 transitions. [2019-09-07 11:18:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-09-07 11:18:49,132 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:49,133 INFO L399 BasicCegarLoop]: trace histogram [69, 69, 69, 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 11:18:49,133 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash -206288581, now seen corresponding path program 46 times [2019-09-07 11:18:49,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:49,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:49,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:49,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:49,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4056 refuted. 0 times theorem prover too weak. 4264 trivial. 0 not checked. [2019-09-07 11:18:49,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:49,562 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 11:18:49,572 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:18:49,741 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:18:49,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:49,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 11:18:49,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7744 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (48)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:18:50,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:50,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2019-09-07 11:18:50,305 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-07 11:18:50,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-07 11:18:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 11:18:50,307 INFO L87 Difference]: Start difference. First operand 184 states and 211 transitions. Second operand 51 states. [2019-09-07 11:18:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:50,458 INFO L93 Difference]: Finished difference Result 321 states and 381 transitions. [2019-09-07 11:18:50,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-07 11:18:50,458 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 331 [2019-09-07 11:18:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:50,460 INFO L225 Difference]: With dead ends: 321 [2019-09-07 11:18:50,460 INFO L226 Difference]: Without dead ends: 192 [2019-09-07 11:18:50,461 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 11:18:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-09-07 11:18:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2019-09-07 11:18:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-07 11:18:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 217 transitions. [2019-09-07 11:18:50,467 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 217 transitions. Word has length 331 [2019-09-07 11:18:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:50,467 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 217 transitions. [2019-09-07 11:18:50,467 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-07 11:18:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 217 transitions. [2019-09-07 11:18:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-09-07 11:18:50,469 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:50,469 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 72, 25, 25, 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 11:18:50,470 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:50,470 INFO L82 PathProgramCache]: Analyzing trace with hash 640656412, now seen corresponding path program 47 times [2019-09-07 11:18:50,470 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:50,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:50,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:50,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:50,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9008 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 8524 trivial. 0 not checked. [2019-09-07 11:18:50,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:50,983 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:18:50,996 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:20:27,136 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-09-07 11:20:27,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:20:27,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 11:20:27,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:20:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9008 backedges. 3556 proven. 852 refuted. 0 times theorem prover too weak. 4600 trivial. 0 not checked. [2019-09-07 11:20:27,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:20:27,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2019-09-07 11:20:27,772 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-07 11:20:27,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-07 11:20:27,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=1800, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 11:20:27,774 INFO L87 Difference]: Start difference. First operand 189 states and 217 transitions. Second operand 50 states. [2019-09-07 11:20:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:20:27,972 INFO L93 Difference]: Finished difference Result 328 states and 389 transitions. [2019-09-07 11:20:27,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-07 11:20:27,973 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 342 [2019-09-07 11:20:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:20:27,975 INFO L225 Difference]: With dead ends: 328 [2019-09-07 11:20:27,975 INFO L226 Difference]: Without dead ends: 197 [2019-09-07 11:20:27,976 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=650, Invalid=1800, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 11:20:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-09-07 11:20:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2019-09-07 11:20:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-07 11:20:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 223 transitions. [2019-09-07 11:20:27,982 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 223 transitions. Word has length 342 [2019-09-07 11:20:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:20:27,982 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 223 transitions. [2019-09-07 11:20:27,982 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-07 11:20:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 223 transitions. [2019-09-07 11:20:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2019-09-07 11:20:27,984 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:20:27,985 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 75, 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 11:20:27,985 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:20:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:20:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1251581499, now seen corresponding path program 48 times [2019-09-07 11:20:27,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:20:27,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:20:27,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:27,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:20:27,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:20:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9719 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 9190 trivial. 0 not checked. [2019-09-07 11:20:28,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:20:28,444 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 11:20:28,454 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:20:40,561 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-07 11:20:40,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:20:40,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 11:20:40,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:20:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9719 backedges. 3860 proven. 529 refuted. 0 times theorem prover too weak. 5330 trivial. 0 not checked. [2019-09-07 11:20:40,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:20:40,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 11:20:40,707 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 11:20:40,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 11:20:40,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:20:40,708 INFO L87 Difference]: Start difference. First operand 194 states and 223 transitions. Second operand 27 states. [2019-09-07 11:20:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:20:40,807 INFO L93 Difference]: Finished difference Result 283 states and 338 transitions. [2019-09-07 11:20:40,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 11:20:40,807 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 353 [2019-09-07 11:20:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:20:40,809 INFO L225 Difference]: With dead ends: 283 [2019-09-07 11:20:40,809 INFO L226 Difference]: Without dead ends: 197 [2019-09-07 11:20:40,810 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:20:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-09-07 11:20:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-09-07 11:20:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-07 11:20:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 225 transitions. [2019-09-07 11:20:40,822 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 225 transitions. Word has length 353 [2019-09-07 11:20:40,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:20:40,823 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 225 transitions. [2019-09-07 11:20:40,823 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 11:20:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 225 transitions. [2019-09-07 11:20:40,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2019-09-07 11:20:40,825 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:20:40,826 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 75, 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 11:20:40,826 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:20:40,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:20:40,826 INFO L82 PathProgramCache]: Analyzing trace with hash -435449539, now seen corresponding path program 49 times [2019-09-07 11:20:40,826 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:20:40,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:20:40,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:40,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:20:40,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:20:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9766 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 9141 trivial. 0 not checked. [2019-09-07 11:20:41,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:20:41,456 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) [2019-09-07 11:20:41,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:20:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:20:41,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 11:20:41,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:20:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9766 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 9141 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (51)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:20:41,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:20:41,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 11:20:41,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 11:20:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 11:20:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 11:20:41,751 INFO L87 Difference]: Start difference. First operand 196 states and 225 transitions. Second operand 29 states. [2019-09-07 11:20:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:20:41,862 INFO L93 Difference]: Finished difference Result 338 states and 396 transitions. [2019-09-07 11:20:41,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 11:20:41,862 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 355 [2019-09-07 11:20:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:20:41,864 INFO L225 Difference]: With dead ends: 338 [2019-09-07 11:20:41,864 INFO L226 Difference]: Without dead ends: 199 [2019-09-07 11:20:41,865 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 11:20:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-09-07 11:20:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2019-09-07 11:20:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-09-07 11:20:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 227 transitions. [2019-09-07 11:20:41,871 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 227 transitions. Word has length 355 [2019-09-07 11:20:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:20:41,871 INFO L475 AbstractCegarLoop]: Abstraction has 198 states and 227 transitions. [2019-09-07 11:20:41,871 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 11:20:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 227 transitions. [2019-09-07 11:20:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-09-07 11:20:41,874 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:20:41,874 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 75, 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 11:20:41,874 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:20:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:20:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1171518885, now seen corresponding path program 50 times [2019-09-07 11:20:41,875 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:20:41,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:20:41,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:41,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:20:41,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:20:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9817 backedges. 0 proven. 4783 refuted. 0 times theorem prover too weak. 5034 trivial. 0 not checked. [2019-09-07 11:20:42,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:20:42,591 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:20:42,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:20:42,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:20:42,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:20:42,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 11:20:42,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:20:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9817 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 9141 trivial. 0 not checked. [2019-09-07 11:20:43,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:20:43,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2019-09-07 11:20:43,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-07 11:20:43,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-07 11:20:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2019-09-07 11:20:43,519 INFO L87 Difference]: Start difference. First operand 198 states and 227 transitions. Second operand 55 states. [2019-09-07 11:20:43,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:20:43,780 INFO L93 Difference]: Finished difference Result 345 states and 409 transitions. [2019-09-07 11:20:43,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-07 11:20:43,780 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 357 [2019-09-07 11:20:43,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:20:43,781 INFO L225 Difference]: With dead ends: 345 [2019-09-07 11:20:43,781 INFO L226 Difference]: Without dead ends: 206 [2019-09-07 11:20:43,782 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2019-09-07 11:20:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-09-07 11:20:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2019-09-07 11:20:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-09-07 11:20:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 233 transitions. [2019-09-07 11:20:43,788 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 233 transitions. Word has length 357 [2019-09-07 11:20:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:20:43,788 INFO L475 AbstractCegarLoop]: Abstraction has 203 states and 233 transitions. [2019-09-07 11:20:43,788 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-07 11:20:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 233 transitions. [2019-09-07 11:20:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-09-07 11:20:43,790 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:20:43,791 INFO L399 BasicCegarLoop]: trace histogram [78, 78, 78, 27, 27, 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 11:20:43,791 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:20:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:20:43,791 INFO L82 PathProgramCache]: Analyzing trace with hash 442583420, now seen corresponding path program 51 times [2019-09-07 11:20:43,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:20:43,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:20:43,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:43,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:20:43,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:20:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10563 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 9987 trivial. 0 not checked. [2019-09-07 11:20:44,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:20:44,245 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) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:20:44,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:20:55,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2019-09-07 11:20:55,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:20:55,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 11:20:55,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:20:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10563 backedges. 4170 proven. 576 refuted. 0 times theorem prover too weak. 5817 trivial. 0 not checked. [2019-09-07 11:20:55,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:20:55,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 11:20:55,944 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 11:20:55,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 11:20:55,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:20:55,945 INFO L87 Difference]: Start difference. First operand 203 states and 233 transitions. Second operand 28 states. [2019-09-07 11:20:56,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:20:56,027 INFO L93 Difference]: Finished difference Result 295 states and 352 transitions. [2019-09-07 11:20:56,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 11:20:56,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 368 [2019-09-07 11:20:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:20:56,032 INFO L225 Difference]: With dead ends: 295 [2019-09-07 11:20:56,032 INFO L226 Difference]: Without dead ends: 206 [2019-09-07 11:20:56,033 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:20:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-09-07 11:20:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2019-09-07 11:20:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-09-07 11:20:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 235 transitions. [2019-09-07 11:20:56,038 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 235 transitions. Word has length 368 [2019-09-07 11:20:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:20:56,038 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 235 transitions. [2019-09-07 11:20:56,039 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 11:20:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 235 transitions. [2019-09-07 11:20:56,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2019-09-07 11:20:56,041 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:20:56,041 INFO L399 BasicCegarLoop]: trace histogram [78, 78, 78, 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 11:20:56,041 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:20:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:20:56,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1092236742, now seen corresponding path program 52 times [2019-09-07 11:20:56,042 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:20:56,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:20:56,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:56,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:20:56,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:20:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10612 backedges. 0 proven. 5169 refuted. 0 times theorem prover too weak. 5443 trivial. 0 not checked. [2019-09-07 11:20:56,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:20:56,494 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) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:20:56,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:20:56,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:20:56,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:20:56,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 11:20:56,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:20:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10612 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 9883 trivial. 0 not checked. [2019-09-07 11:20:57,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:20:57,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 57 [2019-09-07 11:20:57,352 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-07 11:20:57,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-07 11:20:57,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2019-09-07 11:20:57,353 INFO L87 Difference]: Start difference. First operand 205 states and 235 transitions. Second operand 57 states. [2019-09-07 11:20:57,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:20:57,594 INFO L93 Difference]: Finished difference Result 357 states and 423 transitions. [2019-09-07 11:20:57,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-07 11:20:57,594 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 370 [2019-09-07 11:20:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:20:57,595 INFO L225 Difference]: With dead ends: 357 [2019-09-07 11:20:57,596 INFO L226 Difference]: Without dead ends: 213 [2019-09-07 11:20:57,597 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2019-09-07 11:20:57,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-09-07 11:20:57,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2019-09-07 11:20:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-09-07 11:20:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 241 transitions. [2019-09-07 11:20:57,602 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 241 transitions. Word has length 370 [2019-09-07 11:20:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:20:57,603 INFO L475 AbstractCegarLoop]: Abstraction has 210 states and 241 transitions. [2019-09-07 11:20:57,603 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-07 11:20:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 241 transitions. [2019-09-07 11:20:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2019-09-07 11:20:57,605 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:20:57,606 INFO L399 BasicCegarLoop]: trace histogram [81, 81, 81, 28, 28, 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 11:20:57,606 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:20:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:20:57,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1705698951, now seen corresponding path program 53 times [2019-09-07 11:20:57,606 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:20:57,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:20:57,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:57,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:20:57,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:20:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:20:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11387 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10762 trivial. 0 not checked. [2019-09-07 11:20:58,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:20:58,113 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 11:20:58,122 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:22:54,775 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2019-09-07 11:22:54,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:22:54,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 11:22:54,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:22:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11387 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 5821 trivial. 0 not checked. [2019-09-07 11:22:55,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:22:55,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 56 [2019-09-07 11:22:55,460 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-07 11:22:55,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-07 11:22:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 11:22:55,461 INFO L87 Difference]: Start difference. First operand 210 states and 241 transitions. Second operand 56 states. [2019-09-07 11:22:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:22:55,707 INFO L93 Difference]: Finished difference Result 364 states and 431 transitions. [2019-09-07 11:22:55,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-07 11:22:55,707 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 381 [2019-09-07 11:22:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:22:55,709 INFO L225 Difference]: With dead ends: 364 [2019-09-07 11:22:55,709 INFO L226 Difference]: Without dead ends: 218 [2019-09-07 11:22:55,710 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 11:22:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-09-07 11:22:55,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2019-09-07 11:22:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-09-07 11:22:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 247 transitions. [2019-09-07 11:22:55,716 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 247 transitions. Word has length 381 [2019-09-07 11:22:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:22:55,716 INFO L475 AbstractCegarLoop]: Abstraction has 215 states and 247 transitions. [2019-09-07 11:22:55,716 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-07 11:22:55,717 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 247 transitions. [2019-09-07 11:22:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2019-09-07 11:22:55,719 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:22:55,719 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 84, 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 11:22:55,719 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:22:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:22:55,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1781282106, now seen corresponding path program 54 times [2019-09-07 11:22:55,720 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:22:55,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:22:55,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:22:55,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:22:55,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:22:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:22:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12185 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 11509 trivial. 0 not checked. [2019-09-07 11:22:56,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:22:56,235 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 11:22:56,245 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:23:14,652 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2019-09-07 11:23:14,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:23:14,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 11:23:14,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:23:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12185 backedges. 4826 proven. 676 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2019-09-07 11:23:14,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:23:14,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 11:23:14,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 11:23:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 11:23:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 11:23:14,757 INFO L87 Difference]: Start difference. First operand 215 states and 247 transitions. Second operand 30 states. [2019-09-07 11:23:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:23:14,851 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2019-09-07 11:23:14,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 11:23:14,852 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 392 [2019-09-07 11:23:14,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:23:14,853 INFO L225 Difference]: With dead ends: 313 [2019-09-07 11:23:14,853 INFO L226 Difference]: Without dead ends: 218 [2019-09-07 11:23:14,854 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 11:23:14,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-09-07 11:23:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-09-07 11:23:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-09-07 11:23:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 249 transitions. [2019-09-07 11:23:14,860 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 249 transitions. Word has length 392 [2019-09-07 11:23:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:23:14,861 INFO L475 AbstractCegarLoop]: Abstraction has 217 states and 249 transitions. [2019-09-07 11:23:14,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 11:23:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 249 transitions. [2019-09-07 11:23:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2019-09-07 11:23:14,863 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:23:14,863 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 84, 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 11:23:14,863 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:23:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:23:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash -272089096, now seen corresponding path program 55 times [2019-09-07 11:23:14,864 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:23:14,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:23:14,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:14,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:23:14,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:23:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12238 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 11454 trivial. 0 not checked. [2019-09-07 11:23:15,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:23:15,428 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:23:15,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:23:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:23:15,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 11:23:15,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:23:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12238 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 11454 trivial. 0 not checked. [2019-09-07 11:23:15,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:23:15,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-07 11:23:15,701 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 11:23:15,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 11:23:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 11:23:15,701 INFO L87 Difference]: Start difference. First operand 217 states and 249 transitions. Second operand 32 states. [2019-09-07 11:23:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:23:15,815 INFO L93 Difference]: Finished difference Result 374 states and 438 transitions. [2019-09-07 11:23:15,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 11:23:15,816 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 394 [2019-09-07 11:23:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:23:15,817 INFO L225 Difference]: With dead ends: 374 [2019-09-07 11:23:15,817 INFO L226 Difference]: Without dead ends: 220 [2019-09-07 11:23:15,818 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 11:23:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-09-07 11:23:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2019-09-07 11:23:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-09-07 11:23:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 251 transitions. [2019-09-07 11:23:15,824 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 251 transitions. Word has length 394 [2019-09-07 11:23:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:23:15,824 INFO L475 AbstractCegarLoop]: Abstraction has 219 states and 251 transitions. [2019-09-07 11:23:15,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 11:23:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 251 transitions. [2019-09-07 11:23:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-09-07 11:23:15,827 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:23:15,827 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 84, 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 11:23:15,827 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:23:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:23:15,828 INFO L82 PathProgramCache]: Analyzing trace with hash 335798554, now seen corresponding path program 56 times [2019-09-07 11:23:15,828 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:23:15,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:23:15,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:15,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:23:15,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:23:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12295 backedges. 0 proven. 5986 refuted. 0 times theorem prover too weak. 6309 trivial. 0 not checked. [2019-09-07 11:23:16,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:23:16,487 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:23:16,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:23:16,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:23:16,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:23:16,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 11:23:16,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:23:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12295 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 11454 trivial. 0 not checked. [2019-09-07 11:23:17,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:23:17,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 61 [2019-09-07 11:23:17,424 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-07 11:23:17,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-07 11:23:17,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 11:23:17,424 INFO L87 Difference]: Start difference. First operand 219 states and 251 transitions. Second operand 61 states. [2019-09-07 11:23:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:23:17,692 INFO L93 Difference]: Finished difference Result 381 states and 451 transitions. [2019-09-07 11:23:17,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-07 11:23:17,692 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 396 [2019-09-07 11:23:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:23:17,693 INFO L225 Difference]: With dead ends: 381 [2019-09-07 11:23:17,693 INFO L226 Difference]: Without dead ends: 227 [2019-09-07 11:23:17,694 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 11:23:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-09-07 11:23:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2019-09-07 11:23:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-09-07 11:23:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 257 transitions. [2019-09-07 11:23:17,700 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 257 transitions. Word has length 396 [2019-09-07 11:23:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:23:17,700 INFO L475 AbstractCegarLoop]: Abstraction has 224 states and 257 transitions. [2019-09-07 11:23:17,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-07 11:23:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 257 transitions. [2019-09-07 11:23:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2019-09-07 11:23:17,703 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:23:17,703 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 87, 30, 30, 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 11:23:17,703 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:23:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:23:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash 761177113, now seen corresponding path program 57 times [2019-09-07 11:23:17,704 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:23:17,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:23:17,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:17,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:23:17,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:23:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13128 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 12399 trivial. 0 not checked. [2019-09-07 11:23:18,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:23:18,196 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:23:18,207 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:23:49,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2019-09-07 11:23:49,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:23:49,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-07 11:23:49,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:23:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13128 backedges. 5231 proven. 729 refuted. 0 times theorem prover too weak. 7168 trivial. 0 not checked. [2019-09-07 11:23:49,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:23:49,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 33 [2019-09-07 11:23:49,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 11:23:49,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 11:23:49,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 11:23:49,368 INFO L87 Difference]: Start difference. First operand 224 states and 257 transitions. Second operand 33 states. [2019-09-07 11:23:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:23:49,956 INFO L93 Difference]: Finished difference Result 325 states and 388 transitions. [2019-09-07 11:23:49,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 11:23:49,956 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 407 [2019-09-07 11:23:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:23:49,957 INFO L225 Difference]: With dead ends: 325 [2019-09-07 11:23:49,957 INFO L226 Difference]: Without dead ends: 227 [2019-09-07 11:23:49,958 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1339, Invalid=2321, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 11:23:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-09-07 11:23:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2019-09-07 11:23:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-09-07 11:23:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 259 transitions. [2019-09-07 11:23:49,963 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 259 transitions. Word has length 407 [2019-09-07 11:23:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:23:49,964 INFO L475 AbstractCegarLoop]: Abstraction has 226 states and 259 transitions. [2019-09-07 11:23:49,964 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 11:23:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 259 transitions. [2019-09-07 11:23:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2019-09-07 11:23:49,966 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:23:49,966 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 87, 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 11:23:49,967 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:23:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:23:49,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1368812389, now seen corresponding path program 58 times [2019-09-07 11:23:49,967 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:23:49,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:23:49,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:49,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:23:49,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:23:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13183 backedges. 0 proven. 6417 refuted. 0 times theorem prover too weak. 6766 trivial. 0 not checked. [2019-09-07 11:23:50,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:23:50,523 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:23:50,533 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:23:50,737 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:23:50,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:23:50,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 11:23:50,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:23:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13183 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 12283 trivial. 0 not checked. [2019-09-07 11:23:51,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:23:51,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2019-09-07 11:23:51,493 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-07 11:23:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-07 11:23:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 11:23:51,494 INFO L87 Difference]: Start difference. First operand 226 states and 259 transitions. Second operand 63 states. [2019-09-07 11:23:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:23:51,760 INFO L93 Difference]: Finished difference Result 393 states and 465 transitions. [2019-09-07 11:23:51,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-07 11:23:51,760 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 409 [2019-09-07 11:23:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:23:51,761 INFO L225 Difference]: With dead ends: 393 [2019-09-07 11:23:51,761 INFO L226 Difference]: Without dead ends: 234 [2019-09-07 11:23:51,763 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 11:23:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-09-07 11:23:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2019-09-07 11:23:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2019-09-07 11:23:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 265 transitions. [2019-09-07 11:23:51,769 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 265 transitions. Word has length 409 [2019-09-07 11:23:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:23:51,769 INFO L475 AbstractCegarLoop]: Abstraction has 231 states and 265 transitions. [2019-09-07 11:23:51,769 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-07 11:23:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 265 transitions. [2019-09-07 11:23:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-09-07 11:23:51,772 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:23:51,772 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 90, 31, 31, 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 11:23:51,772 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:23:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:23:51,773 INFO L82 PathProgramCache]: Analyzing trace with hash 45542460, now seen corresponding path program 59 times [2019-09-07 11:23:51,773 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:23:51,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:23:51,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:51,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:23:51,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:23:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:23:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14045 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 13261 trivial. 0 not checked. [2019-09-07 11:23:52,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:23:52,349 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:23:52,360 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:26:45,042 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2019-09-07 11:26:45,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:26:45,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 11:26:45,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:26:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14045 backedges. 5524 proven. 1335 refuted. 0 times theorem prover too weak. 7186 trivial. 0 not checked. [2019-09-07 11:26:45,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:26:45,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 62 [2019-09-07 11:26:45,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 11:26:45,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 11:26:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 11:26:45,906 INFO L87 Difference]: Start difference. First operand 231 states and 265 transitions. Second operand 62 states. [2019-09-07 11:26:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:26:46,149 INFO L93 Difference]: Finished difference Result 400 states and 473 transitions. [2019-09-07 11:26:46,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 11:26:46,150 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 420 [2019-09-07 11:26:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:26:46,152 INFO L225 Difference]: With dead ends: 400 [2019-09-07 11:26:46,152 INFO L226 Difference]: Without dead ends: 239 [2019-09-07 11:26:46,153 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 11:26:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-09-07 11:26:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2019-09-07 11:26:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-09-07 11:26:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 271 transitions. [2019-09-07 11:26:46,160 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 271 transitions. Word has length 420 [2019-09-07 11:26:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:26:46,161 INFO L475 AbstractCegarLoop]: Abstraction has 236 states and 271 transitions. [2019-09-07 11:26:46,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 11:26:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 271 transitions. [2019-09-07 11:26:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2019-09-07 11:26:46,163 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:26:46,163 INFO L399 BasicCegarLoop]: trace histogram [93, 93, 93, 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 11:26:46,164 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:26:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:26:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2063951205, now seen corresponding path program 60 times [2019-09-07 11:26:46,164 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:26:46,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:26:46,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:26:46,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:26:46,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:26:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:26:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14930 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 14089 trivial. 0 not checked. [2019-09-07 11:26:46,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:26:46,688 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:26:46,701 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:27:14,404 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2019-09-07 11:27:14,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:27:14,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-07 11:27:14,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:27:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14930 backedges. 5900 proven. 841 refuted. 0 times theorem prover too weak. 8189 trivial. 0 not checked. [2019-09-07 11:27:14,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:27:14,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-09-07 11:27:14,538 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 11:27:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 11:27:14,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 11:27:14,539 INFO L87 Difference]: Start difference. First operand 236 states and 271 transitions. Second operand 33 states. [2019-09-07 11:27:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:27:14,637 INFO L93 Difference]: Finished difference Result 343 states and 410 transitions. [2019-09-07 11:27:14,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 11:27:14,638 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 431 [2019-09-07 11:27:14,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:27:14,640 INFO L225 Difference]: With dead ends: 343 [2019-09-07 11:27:14,640 INFO L226 Difference]: Without dead ends: 239 [2019-09-07 11:27:14,641 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 11:27:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-09-07 11:27:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2019-09-07 11:27:14,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-09-07 11:27:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 273 transitions. [2019-09-07 11:27:14,647 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 273 transitions. Word has length 431 [2019-09-07 11:27:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:27:14,648 INFO L475 AbstractCegarLoop]: Abstraction has 238 states and 273 transitions. [2019-09-07 11:27:14,648 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 11:27:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 273 transitions. [2019-09-07 11:27:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2019-09-07 11:27:14,650 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:27:14,651 INFO L399 BasicCegarLoop]: trace histogram [93, 93, 93, 31, 31, 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 11:27:14,651 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:27:14,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:27:14,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2066210531, now seen corresponding path program 61 times [2019-09-07 11:27:14,651 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:27:14,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:27:14,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:14,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:27:14,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:27:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14989 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2019-09-07 11:27:15,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:27:15,371 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:27:15,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:27:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:27:15,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 11:27:15,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:27:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14989 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2019-09-07 11:27:15,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:27:15,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-09-07 11:27:15,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-07 11:27:15,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-07 11:27:15,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 11:27:15,706 INFO L87 Difference]: Start difference. First operand 238 states and 273 transitions. Second operand 35 states. [2019-09-07 11:27:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:27:15,813 INFO L93 Difference]: Finished difference Result 410 states and 480 transitions. [2019-09-07 11:27:15,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 11:27:15,813 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 433 [2019-09-07 11:27:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:27:15,814 INFO L225 Difference]: With dead ends: 410 [2019-09-07 11:27:15,815 INFO L226 Difference]: Without dead ends: 241 [2019-09-07 11:27:15,815 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 11:27:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-09-07 11:27:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2019-09-07 11:27:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2019-09-07 11:27:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 275 transitions. [2019-09-07 11:27:15,822 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 275 transitions. Word has length 433 [2019-09-07 11:27:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:27:15,822 INFO L475 AbstractCegarLoop]: Abstraction has 240 states and 275 transitions. [2019-09-07 11:27:15,822 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-07 11:27:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 275 transitions. [2019-09-07 11:27:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2019-09-07 11:27:15,825 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:27:15,825 INFO L399 BasicCegarLoop]: trace histogram [93, 93, 93, 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 11:27:15,825 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:27:15,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:27:15,826 INFO L82 PathProgramCache]: Analyzing trace with hash -894214725, now seen corresponding path program 62 times [2019-09-07 11:27:15,826 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:27:15,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:27:15,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:15,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:27:15,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:27:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15052 backedges. 0 proven. 7324 refuted. 0 times theorem prover too weak. 7728 trivial. 0 not checked. [2019-09-07 11:27:16,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:27:16,754 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:27:16,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:27:16,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:27:16,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:27:16,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-07 11:27:16,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:27:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15052 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2019-09-07 11:27:17,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:27:17,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 67 [2019-09-07 11:27:17,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-07 11:27:17,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-07 11:27:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2019-09-07 11:27:17,919 INFO L87 Difference]: Start difference. First operand 240 states and 275 transitions. Second operand 67 states. [2019-09-07 11:27:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:27:18,146 INFO L93 Difference]: Finished difference Result 417 states and 493 transitions. [2019-09-07 11:27:18,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-07 11:27:18,147 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 435 [2019-09-07 11:27:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:27:18,148 INFO L225 Difference]: With dead ends: 417 [2019-09-07 11:27:18,148 INFO L226 Difference]: Without dead ends: 248 [2019-09-07 11:27:18,149 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2019-09-07 11:27:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-09-07 11:27:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 245. [2019-09-07 11:27:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-09-07 11:27:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 281 transitions. [2019-09-07 11:27:18,155 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 281 transitions. Word has length 435 [2019-09-07 11:27:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:27:18,155 INFO L475 AbstractCegarLoop]: Abstraction has 245 states and 281 transitions. [2019-09-07 11:27:18,155 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-07 11:27:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 281 transitions. [2019-09-07 11:27:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2019-09-07 11:27:18,158 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:27:18,159 INFO L399 BasicCegarLoop]: trace histogram [96, 96, 96, 33, 33, 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 11:27:18,159 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:27:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:27:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1423513188, now seen corresponding path program 63 times [2019-09-07 11:27:18,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:27:18,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:27:18,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:18,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:27:18,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:27:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15972 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 15072 trivial. 0 not checked. [2019-09-07 11:27:18,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:27:18,793 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:27:18,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:27:53,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2019-09-07 11:27:53,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:27:53,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-07 11:27:53,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:27:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15972 backedges. 6282 proven. 900 refuted. 0 times theorem prover too weak. 8790 trivial. 0 not checked. [2019-09-07 11:27:53,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:27:53,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-09-07 11:27:53,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 11:27:53,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 11:27:53,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 11:27:53,124 INFO L87 Difference]: Start difference. First operand 245 states and 281 transitions. Second operand 34 states. [2019-09-07 11:27:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:27:53,224 INFO L93 Difference]: Finished difference Result 355 states and 424 transitions. [2019-09-07 11:27:53,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 11:27:53,225 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 446 [2019-09-07 11:27:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:27:53,227 INFO L225 Difference]: With dead ends: 355 [2019-09-07 11:27:53,227 INFO L226 Difference]: Without dead ends: 248 [2019-09-07 11:27:53,227 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 11:27:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-09-07 11:27:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2019-09-07 11:27:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2019-09-07 11:27:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 283 transitions. [2019-09-07 11:27:53,233 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 283 transitions. Word has length 446 [2019-09-07 11:27:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:27:53,233 INFO L475 AbstractCegarLoop]: Abstraction has 247 states and 283 transitions. [2019-09-07 11:27:53,233 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 11:27:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 283 transitions. [2019-09-07 11:27:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2019-09-07 11:27:53,236 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:27:53,236 INFO L399 BasicCegarLoop]: trace histogram [96, 96, 96, 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 11:27:53,237 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:27:53,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:27:53,237 INFO L82 PathProgramCache]: Analyzing trace with hash -382662950, now seen corresponding path program 64 times [2019-09-07 11:27:53,237 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:27:53,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:27:53,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:53,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:27:53,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:27:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16033 backedges. 0 proven. 7800 refuted. 0 times theorem prover too weak. 8233 trivial. 0 not checked. [2019-09-07 11:27:54,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:27:54,009 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:27:54,020 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:27:54,251 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:27:54,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:27:54,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 11:27:54,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:27:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16033 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 14944 trivial. 0 not checked. [2019-09-07 11:27:55,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:27:55,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 69 [2019-09-07 11:27:55,203 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-07 11:27:55,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-07 11:27:55,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2019-09-07 11:27:55,204 INFO L87 Difference]: Start difference. First operand 247 states and 283 transitions. Second operand 69 states. [2019-09-07 11:27:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:27:55,481 INFO L93 Difference]: Finished difference Result 429 states and 507 transitions. [2019-09-07 11:27:55,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-07 11:27:55,481 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 448 [2019-09-07 11:27:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:27:55,482 INFO L225 Difference]: With dead ends: 429 [2019-09-07 11:27:55,482 INFO L226 Difference]: Without dead ends: 255 [2019-09-07 11:27:55,483 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2019-09-07 11:27:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-09-07 11:27:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2019-09-07 11:27:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2019-09-07 11:27:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 289 transitions. [2019-09-07 11:27:55,490 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 289 transitions. Word has length 448 [2019-09-07 11:27:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:27:55,490 INFO L475 AbstractCegarLoop]: Abstraction has 252 states and 289 transitions. [2019-09-07 11:27:55,490 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-07 11:27:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 289 transitions. [2019-09-07 11:27:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2019-09-07 11:27:55,493 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:27:55,493 INFO L399 BasicCegarLoop]: trace histogram [99, 99, 99, 34, 34, 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 11:27:55,493 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:27:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:27:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1512283815, now seen corresponding path program 65 times [2019-09-07 11:27:55,493 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:27:55,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:27:55,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:55,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:27:55,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:27:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:27:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16982 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 16021 trivial. 0 not checked. [2019-09-07 11:27:56,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:27:56,209 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:27:56,219 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1