java -Xss4m -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-71425fa [2018-07-21 22:39:04,453 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-21 22:39:04,455 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-21 22:39:04,472 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-21 22:39:04,472 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-21 22:39:04,473 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-21 22:39:04,474 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-21 22:39:04,480 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-21 22:39:04,482 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-21 22:39:04,485 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-21 22:39:04,486 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-21 22:39:04,486 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-21 22:39:04,487 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-21 22:39:04,490 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-21 22:39:04,491 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-21 22:39:04,492 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-21 22:39:04,504 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-21 22:39:04,506 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-21 22:39:04,508 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-21 22:39:04,509 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-21 22:39:04,510 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-21 22:39:04,511 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-21 22:39:04,517 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-21 22:39:04,533 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-07-21 22:39:04,558 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-21 22:39:04,558 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-21 22:39:04,559 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-21 22:39:04,559 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-07-21 22:39:04,561 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-07-21 22:39:04,562 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-07-21 22:39:04,562 INFO L133 SettingsManager]: * Use SBE=true [2018-07-21 22:39:04,562 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-21 22:39:04,562 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-21 22:39:04,562 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-21 22:39:04,562 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-21 22:39:04,563 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-21 22:39:04,563 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-21 22:39:04,563 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-21 22:39:04,563 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-21 22:39:04,563 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-21 22:39:04,564 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-21 22:39:04,564 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-21 22:39:04,564 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-21 22:39:04,564 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-21 22:39:04,564 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-21 22:39:04,564 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-07-21 22:39:04,565 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-21 22:39:04,566 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-21 22:39:04,566 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-07-21 22:39:04,566 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-21 22:39:04,566 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-21 22:39:04,567 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-21 22:39:04,567 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-21 22:39:04,620 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-21 22:39:04,635 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-21 22:39:04,643 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-21 22:39:04,645 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-21 22:39:04,645 INFO L276 PluginConnector]: CDTParser initialized [2018-07-21 22:39:04,646 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i [2018-07-21 22:39:04,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/67f542ef4/b5c01ee12dd440f1ba04e993b7a0fce0/FLAGb20a835ff [2018-07-21 22:39:05,144 INFO L276 CDTParser]: Found 1 translation units. [2018-07-21 22:39:05,145 INFO L158 CDTParser]: Scanning /storage/ultimate/trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i [2018-07-21 22:39:05,153 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/67f542ef4/b5c01ee12dd440f1ba04e993b7a0fce0/FLAGb20a835ff [2018-07-21 22:39:05,168 INFO L332 CDTParser]: Successfully deleted /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/67f542ef4/b5c01ee12dd440f1ba04e993b7a0fce0 [2018-07-21 22:39:05,180 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-21 22:39:05,187 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-21 22:39:05,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-21 22:39:05,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-21 22:39:05,195 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-21 22:39:05,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b93645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05, skipping insertion in model container [2018-07-21 22:39:05,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,350 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-21 22:39:05,391 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:39:05,408 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-21 22:39:05,414 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-21 22:39:05,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05 WrapperNode [2018-07-21 22:39:05,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-21 22:39:05,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-21 22:39:05,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-21 22:39:05,432 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-21 22:39:05,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-21 22:39:05,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-21 22:39:05,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-21 22:39:05,471 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-21 22:39:05,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... [2018-07-21 22:39:05,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-21 22:39:05,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-21 22:39:05,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-21 22:39:05,494 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-21 22:39:05,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (1/1) ... No working directory specified, using /storage/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 [2018-07-21 22:39:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-21 22:39:05,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-21 22:39:06,024 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-21 22:39:06,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:39:06 BoogieIcfgContainer [2018-07-21 22:39:06,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-21 22:39:06,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-21 22:39:06,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-21 22:39:06,029 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-21 22:39:06,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:39:05" (1/3) ... [2018-07-21 22:39:06,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58339be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:39:06, skipping insertion in model container [2018-07-21 22:39:06,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:39:05" (2/3) ... [2018-07-21 22:39:06,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58339be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:39:06, skipping insertion in model container [2018-07-21 22:39:06,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:39:06" (3/3) ... [2018-07-21 22:39:06,033 INFO L112 eAbstractionObserver]: Analyzing ICFG up_true-unreach-call_true-termination.i [2018-07-21 22:39:06,052 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-21 22:39:06,069 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-21 22:39:06,156 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-21 22:39:06,157 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-21 22:39:06,157 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-21 22:39:06,157 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-21 22:39:06,158 INFO L376 AbstractCegarLoop]: Backedges is TWOTRACK [2018-07-21 22:39:06,158 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-21 22:39:06,158 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-21 22:39:06,158 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-21 22:39:06,158 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-21 22:39:06,174 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-07-21 22:39:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-21 22:39:06,184 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:06,184 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:06,184 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash 383759085, now seen corresponding path program 1 times [2018-07-21 22:39:06,190 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:06,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:06,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:06,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:06,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:06,299 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:39:06,299 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-21 22:39:06,304 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-21 22:39:06,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-21 22:39:06,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-21 22:39:06,324 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-07-21 22:39:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:06,345 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2018-07-21 22:39:06,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-21 22:39:06,346 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-07-21 22:39:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:06,356 INFO L225 Difference]: With dead ends: 24 [2018-07-21 22:39:06,356 INFO L226 Difference]: Without dead ends: 11 [2018-07-21 22:39:06,359 INFO L578 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 [2018-07-21 22:39:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-21 22:39:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-21 22:39:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-21 22:39:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-07-21 22:39:06,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-07-21 22:39:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:06,411 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-07-21 22:39:06,412 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-21 22:39:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-07-21 22:39:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-21 22:39:06,414 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:06,414 INFO L358 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:06,414 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:06,414 INFO L82 PathProgramCache]: Analyzing trace with hash 325884241, now seen corresponding path program 1 times [2018-07-21 22:39:06,415 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:06,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:06,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:06,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:06,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:06,564 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:39:06,564 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-21 22:39:06,566 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-21 22:39:06,566 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-21 22:39:06,566 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:39:06,566 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2018-07-21 22:39:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:06,698 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-07-21 22:39:06,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-21 22:39:06,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-07-21 22:39:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:06,699 INFO L225 Difference]: With dead ends: 22 [2018-07-21 22:39:06,700 INFO L226 Difference]: Without dead ends: 13 [2018-07-21 22:39:06,701 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:39:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-21 22:39:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-21 22:39:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-21 22:39:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-07-21 22:39:06,708 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-07-21 22:39:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:06,709 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-07-21 22:39:06,709 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-21 22:39:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-07-21 22:39:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-21 22:39:06,710 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:06,710 INFO L358 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:06,710 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1748104565, now seen corresponding path program 1 times [2018-07-21 22:39:06,711 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:06,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:06,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:06,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:06,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:06,780 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-21 22:39:06,780 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-21 22:39:06,780 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-21 22:39:06,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-21 22:39:06,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-21 22:39:06,781 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-07-21 22:39:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:06,908 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-07-21 22:39:06,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-21 22:39:06,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-07-21 22:39:06,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:06,909 INFO L225 Difference]: With dead ends: 25 [2018-07-21 22:39:06,910 INFO L226 Difference]: Without dead ends: 23 [2018-07-21 22:39:06,910 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-07-21 22:39:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-21 22:39:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-07-21 22:39:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-21 22:39:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-07-21 22:39:06,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-07-21 22:39:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:06,914 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-07-21 22:39:06,914 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-21 22:39:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-07-21 22:39:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-21 22:39:06,915 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:06,915 INFO L358 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:06,915 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1639575084, now seen corresponding path program 1 times [2018-07-21 22:39:06,916 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:06,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:06,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:06,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:06,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:07,188 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:07,188 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:07,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:07,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:07,348 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:07,348 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-07-21 22:39:07,348 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-21 22:39:07,348 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-21 22:39:07,349 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:39:07,349 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2018-07-21 22:39:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:07,550 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-07-21 22:39:07,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-21 22:39:07,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-07-21 22:39:07,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:07,551 INFO L225 Difference]: With dead ends: 31 [2018-07-21 22:39:07,552 INFO L226 Difference]: Without dead ends: 18 [2018-07-21 22:39:07,552 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:39:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-21 22:39:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-21 22:39:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-21 22:39:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-07-21 22:39:07,556 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-07-21 22:39:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:07,556 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-07-21 22:39:07,557 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-21 22:39:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-07-21 22:39:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-21 22:39:07,557 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:07,557 INFO L358 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:07,558 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:07,558 INFO L82 PathProgramCache]: Analyzing trace with hash 842542990, now seen corresponding path program 2 times [2018-07-21 22:39:07,558 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:07,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:07,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:07,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:07,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:07,723 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:07,723 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:07,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:39:07,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:39:07,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:07,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:07,835 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:07,835 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-07-21 22:39:07,835 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-21 22:39:07,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-21 22:39:07,836 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-07-21 22:39:07,836 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-07-21 22:39:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:08,087 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-07-21 22:39:08,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-21 22:39:08,087 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-07-21 22:39:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:08,088 INFO L225 Difference]: With dead ends: 31 [2018-07-21 22:39:08,088 INFO L226 Difference]: Without dead ends: 29 [2018-07-21 22:39:08,089 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:39:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-21 22:39:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-07-21 22:39:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-21 22:39:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-07-21 22:39:08,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-07-21 22:39:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:08,095 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-07-21 22:39:08,095 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-21 22:39:08,095 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-07-21 22:39:08,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-21 22:39:08,096 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:08,096 INFO L358 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:08,096 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:08,096 INFO L82 PathProgramCache]: Analyzing trace with hash -46138025, now seen corresponding path program 3 times [2018-07-21 22:39:08,096 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:08,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:08,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:08,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:08,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:08,431 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:08,432 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:08,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:39:08,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-07-21 22:39:08,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:08,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:08,559 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:08,559 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-07-21 22:39:08,560 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-21 22:39:08,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-21 22:39:08,560 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:39:08,560 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2018-07-21 22:39:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:08,680 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-07-21 22:39:08,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-21 22:39:08,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-07-21 22:39:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:08,681 INFO L225 Difference]: With dead ends: 41 [2018-07-21 22:39:08,681 INFO L226 Difference]: Without dead ends: 24 [2018-07-21 22:39:08,682 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:39:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-21 22:39:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-21 22:39:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-21 22:39:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-07-21 22:39:08,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2018-07-21 22:39:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:08,687 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-07-21 22:39:08,687 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-21 22:39:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-07-21 22:39:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-21 22:39:08,688 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:08,688 INFO L358 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:08,688 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash -676370543, now seen corresponding path program 4 times [2018-07-21 22:39:08,689 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:08,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:08,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:08,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:08,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:08,820 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:08,820 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:08,828 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:39:08,843 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:39:08,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:08,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:08,900 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:08,900 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-07-21 22:39:08,900 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-21 22:39:08,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-21 22:39:08,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-21 22:39:08,901 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2018-07-21 22:39:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:09,117 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-07-21 22:39:09,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-21 22:39:09,118 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-07-21 22:39:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:09,118 INFO L225 Difference]: With dead ends: 37 [2018-07-21 22:39:09,119 INFO L226 Difference]: Without dead ends: 35 [2018-07-21 22:39:09,119 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:39:09,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-21 22:39:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-07-21 22:39:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-21 22:39:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-07-21 22:39:09,125 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-07-21 22:39:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:09,125 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-07-21 22:39:09,126 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-21 22:39:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-07-21 22:39:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-21 22:39:09,126 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:09,127 INFO L358 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:09,127 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:09,127 INFO L82 PathProgramCache]: Analyzing trace with hash 612727770, now seen corresponding path program 5 times [2018-07-21 22:39:09,127 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:09,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:09,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:09,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:09,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:09,533 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:09,533 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:09,540 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:39:09,564 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-07-21 22:39:09,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:09,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:09,645 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:09,646 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-07-21 22:39:09,646 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-21 22:39:09,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-21 22:39:09,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:39:09,647 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 15 states. [2018-07-21 22:39:10,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:10,284 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-07-21 22:39:10,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-21 22:39:10,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2018-07-21 22:39:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:10,285 INFO L225 Difference]: With dead ends: 51 [2018-07-21 22:39:10,285 INFO L226 Difference]: Without dead ends: 30 [2018-07-21 22:39:10,286 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:39:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-21 22:39:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-07-21 22:39:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-21 22:39:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-07-21 22:39:10,292 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2018-07-21 22:39:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:10,292 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-07-21 22:39:10,292 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-21 22:39:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-07-21 22:39:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-21 22:39:10,293 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:10,293 INFO L358 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:10,293 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:10,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2140745068, now seen corresponding path program 6 times [2018-07-21 22:39:10,294 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:10,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:10,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:10,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:10,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:10,447 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:10,447 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:10,453 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:39:10,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-07-21 22:39:10,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:10,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:10,530 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:10,530 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-07-21 22:39:10,530 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-21 22:39:10,531 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-21 22:39:10,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-07-21 22:39:10,531 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-07-21 22:39:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:10,645 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-07-21 22:39:10,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-21 22:39:10,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-07-21 22:39:10,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:10,646 INFO L225 Difference]: With dead ends: 43 [2018-07-21 22:39:10,646 INFO L226 Difference]: Without dead ends: 41 [2018-07-21 22:39:10,647 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:39:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-21 22:39:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2018-07-21 22:39:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-21 22:39:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-07-21 22:39:10,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2018-07-21 22:39:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:10,654 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-07-21 22:39:10,654 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-21 22:39:10,654 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-07-21 22:39:10,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-21 22:39:10,655 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:10,655 INFO L358 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:10,655 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:10,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2109320541, now seen corresponding path program 7 times [2018-07-21 22:39:10,656 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:10,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:10,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:10,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:10,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:10,805 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:10,805 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:10,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:10,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:10,967 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:10,968 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2018-07-21 22:39:10,968 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-21 22:39:10,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-21 22:39:10,968 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:39:10,969 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2018-07-21 22:39:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:11,112 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-07-21 22:39:11,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-21 22:39:11,112 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-07-21 22:39:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:11,113 INFO L225 Difference]: With dead ends: 61 [2018-07-21 22:39:11,113 INFO L226 Difference]: Without dead ends: 36 [2018-07-21 22:39:11,113 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:39:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-21 22:39:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-21 22:39:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-21 22:39:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-07-21 22:39:11,120 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-07-21 22:39:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:11,120 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-07-21 22:39:11,120 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-21 22:39:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-07-21 22:39:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-21 22:39:11,121 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:11,121 INFO L358 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:11,122 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:11,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1946783895, now seen corresponding path program 8 times [2018-07-21 22:39:11,122 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:11,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:11,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:11,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:11,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:11,290 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:11,290 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:11,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:39:11,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:39:11,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:11,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:11,377 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:11,377 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-07-21 22:39:11,377 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-21 22:39:11,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-21 22:39:11,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-07-21 22:39:11,378 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2018-07-21 22:39:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:11,472 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-07-21 22:39:11,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-21 22:39:11,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-07-21 22:39:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:11,472 INFO L225 Difference]: With dead ends: 49 [2018-07-21 22:39:11,472 INFO L226 Difference]: Without dead ends: 47 [2018-07-21 22:39:11,473 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:39:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-21 22:39:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2018-07-21 22:39:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-21 22:39:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-07-21 22:39:11,480 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-07-21 22:39:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:11,480 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-07-21 22:39:11,480 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-21 22:39:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-07-21 22:39:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-21 22:39:11,481 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:11,482 INFO L358 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:11,482 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:11,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1173860832, now seen corresponding path program 9 times [2018-07-21 22:39:11,482 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:11,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:11,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:11,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:11,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:11,725 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:11,725 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:11,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:39:11,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-21 22:39:11,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:11,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:12,113 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:12,113 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2018-07-21 22:39:12,113 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-21 22:39:12,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-21 22:39:12,114 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:39:12,114 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 21 states. [2018-07-21 22:39:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:12,272 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-07-21 22:39:12,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-21 22:39:12,273 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2018-07-21 22:39:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:12,273 INFO L225 Difference]: With dead ends: 71 [2018-07-21 22:39:12,274 INFO L226 Difference]: Without dead ends: 42 [2018-07-21 22:39:12,274 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2018-07-21 22:39:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-21 22:39:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-07-21 22:39:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-21 22:39:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-07-21 22:39:12,281 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-07-21 22:39:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:12,282 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-07-21 22:39:12,282 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-21 22:39:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-07-21 22:39:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-21 22:39:12,283 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:12,283 INFO L358 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:12,283 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:12,284 INFO L82 PathProgramCache]: Analyzing trace with hash 666550682, now seen corresponding path program 10 times [2018-07-21 22:39:12,284 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:12,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:12,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:12,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:12,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:12,734 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:12,734 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:12,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:39:12,758 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:39:12,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:12,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:12,817 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:12,817 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-07-21 22:39:12,817 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-21 22:39:12,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-21 22:39:12,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-07-21 22:39:12,818 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2018-07-21 22:39:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:12,988 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-07-21 22:39:12,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-21 22:39:12,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-07-21 22:39:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:12,989 INFO L225 Difference]: With dead ends: 55 [2018-07-21 22:39:12,989 INFO L226 Difference]: Without dead ends: 53 [2018-07-21 22:39:12,990 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:39:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-21 22:39:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2018-07-21 22:39:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-21 22:39:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-07-21 22:39:12,998 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2018-07-21 22:39:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:12,998 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-07-21 22:39:12,998 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-21 22:39:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-07-21 22:39:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-21 22:39:12,999 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:13,000 INFO L358 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:13,000 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:13,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1808968035, now seen corresponding path program 11 times [2018-07-21 22:39:13,000 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:13,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:13,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:13,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:13,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:13,283 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:13,283 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:13,290 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:39:13,311 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-07-21 22:39:13,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:13,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:13,514 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:13,514 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2018-07-21 22:39:13,514 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-21 22:39:13,515 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-21 22:39:13,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:39:13,515 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 24 states. [2018-07-21 22:39:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:13,687 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-07-21 22:39:13,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-21 22:39:13,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2018-07-21 22:39:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:13,688 INFO L225 Difference]: With dead ends: 81 [2018-07-21 22:39:13,688 INFO L226 Difference]: Without dead ends: 48 [2018-07-21 22:39:13,689 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2018-07-21 22:39:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-21 22:39:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-07-21 22:39:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-21 22:39:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-07-21 22:39:13,698 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2018-07-21 22:39:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:13,699 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-07-21 22:39:13,699 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-21 22:39:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-07-21 22:39:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-21 22:39:13,700 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:13,700 INFO L358 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:13,700 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1676311139, now seen corresponding path program 12 times [2018-07-21 22:39:13,700 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:13,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:13,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:13,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:13,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:13,832 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:13,832 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:13,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:39:13,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-07-21 22:39:13,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:13,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:13,920 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:13,920 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-07-21 22:39:13,920 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-21 22:39:13,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-21 22:39:13,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-07-21 22:39:13,921 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2018-07-21 22:39:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:14,112 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-07-21 22:39:14,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-21 22:39:14,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-07-21 22:39:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:14,113 INFO L225 Difference]: With dead ends: 61 [2018-07-21 22:39:14,113 INFO L226 Difference]: Without dead ends: 59 [2018-07-21 22:39:14,114 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:39:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-21 22:39:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2018-07-21 22:39:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-21 22:39:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-07-21 22:39:14,123 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2018-07-21 22:39:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:14,123 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-07-21 22:39:14,123 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-21 22:39:14,123 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-07-21 22:39:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-21 22:39:14,124 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:14,124 INFO L358 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:14,124 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:14,125 INFO L82 PathProgramCache]: Analyzing trace with hash -313150490, now seen corresponding path program 13 times [2018-07-21 22:39:14,125 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:14,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:14,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:14,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:14,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:15,397 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:15,397 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:15,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:15,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:15,631 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:15,631 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2018-07-21 22:39:15,631 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-21 22:39:15,632 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-21 22:39:15,632 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2018-07-21 22:39:15,632 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 27 states. [2018-07-21 22:39:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:15,866 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-07-21 22:39:15,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-21 22:39:15,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2018-07-21 22:39:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:15,867 INFO L225 Difference]: With dead ends: 91 [2018-07-21 22:39:15,867 INFO L226 Difference]: Without dead ends: 54 [2018-07-21 22:39:15,868 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2018-07-21 22:39:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-21 22:39:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-07-21 22:39:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-21 22:39:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-07-21 22:39:15,877 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2018-07-21 22:39:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:15,877 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-07-21 22:39:15,877 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-21 22:39:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-07-21 22:39:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-21 22:39:15,878 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:15,878 INFO L358 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:15,879 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash 992804000, now seen corresponding path program 14 times [2018-07-21 22:39:15,879 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:15,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:15,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:15,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:15,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:16,205 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:16,205 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:16,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:39:16,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:39:16,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:16,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:16,291 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:16,291 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-07-21 22:39:16,291 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-21 22:39:16,292 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-21 22:39:16,292 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-07-21 22:39:16,292 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 14 states. [2018-07-21 22:39:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:16,412 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-07-21 22:39:16,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-21 22:39:16,413 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-07-21 22:39:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:16,414 INFO L225 Difference]: With dead ends: 67 [2018-07-21 22:39:16,414 INFO L226 Difference]: Without dead ends: 65 [2018-07-21 22:39:16,415 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:39:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-21 22:39:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2018-07-21 22:39:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-21 22:39:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-07-21 22:39:16,426 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2018-07-21 22:39:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:16,426 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-07-21 22:39:16,426 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-21 22:39:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-07-21 22:39:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-21 22:39:16,427 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:16,427 INFO L358 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:16,427 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:16,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1241255575, now seen corresponding path program 15 times [2018-07-21 22:39:16,428 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:16,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:16,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:16,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:16,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:16,675 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:16,675 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:16,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:39:16,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-07-21 22:39:16,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:16,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:16,906 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:16,906 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2018-07-21 22:39:16,906 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-21 22:39:16,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-21 22:39:16,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2018-07-21 22:39:16,907 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 30 states. [2018-07-21 22:39:17,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:17,096 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-07-21 22:39:17,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-21 22:39:17,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 57 [2018-07-21 22:39:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:17,097 INFO L225 Difference]: With dead ends: 101 [2018-07-21 22:39:17,098 INFO L226 Difference]: Without dead ends: 60 [2018-07-21 22:39:17,098 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2018-07-21 22:39:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-21 22:39:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-07-21 22:39:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-21 22:39:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-07-21 22:39:17,107 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2018-07-21 22:39:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:17,107 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-07-21 22:39:17,107 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-21 22:39:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-07-21 22:39:17,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-21 22:39:17,108 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:17,108 INFO L358 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:17,109 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:17,109 INFO L82 PathProgramCache]: Analyzing trace with hash 915162787, now seen corresponding path program 16 times [2018-07-21 22:39:17,109 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:17,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:17,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:17,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:17,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:17,319 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:17,319 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:17,325 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:39:17,344 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:39:17,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:17,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:17,382 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:17,382 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-07-21 22:39:17,382 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-21 22:39:17,383 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-21 22:39:17,383 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-07-21 22:39:17,383 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2018-07-21 22:39:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:17,526 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-07-21 22:39:17,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-21 22:39:17,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2018-07-21 22:39:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:17,527 INFO L225 Difference]: With dead ends: 73 [2018-07-21 22:39:17,527 INFO L226 Difference]: Without dead ends: 71 [2018-07-21 22:39:17,528 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-07-21 22:39:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-21 22:39:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-07-21 22:39:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-21 22:39:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-07-21 22:39:17,539 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2018-07-21 22:39:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:17,539 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-07-21 22:39:17,539 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-21 22:39:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-07-21 22:39:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-21 22:39:17,540 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:17,540 INFO L358 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:17,540 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:17,540 INFO L82 PathProgramCache]: Analyzing trace with hash -52919828, now seen corresponding path program 17 times [2018-07-21 22:39:17,541 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:17,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:17,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:17,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:17,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:17,850 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:17,850 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:17,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:39:17,881 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-07-21 22:39:17,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:17,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:18,491 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:18,491 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2018-07-21 22:39:18,492 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-21 22:39:18,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-21 22:39:18,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2018-07-21 22:39:18,493 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 33 states. [2018-07-21 22:39:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:18,831 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-07-21 22:39:18,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-21 22:39:18,831 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2018-07-21 22:39:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:18,832 INFO L225 Difference]: With dead ends: 111 [2018-07-21 22:39:18,832 INFO L226 Difference]: Without dead ends: 66 [2018-07-21 22:39:18,832 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2018-07-21 22:39:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-21 22:39:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-07-21 22:39:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-21 22:39:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-07-21 22:39:18,841 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2018-07-21 22:39:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:18,844 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-07-21 22:39:18,844 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-21 22:39:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-07-21 22:39:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-21 22:39:18,845 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:18,845 INFO L358 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:18,845 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:18,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1698071462, now seen corresponding path program 18 times [2018-07-21 22:39:18,846 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:18,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:18,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:18,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:18,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:19,312 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:19,312 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:19,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:39:19,389 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-07-21 22:39:19,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:19,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:19,530 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:19,530 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-07-21 22:39:19,531 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-21 22:39:19,531 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-21 22:39:19,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-07-21 22:39:19,531 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 16 states. [2018-07-21 22:39:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:19,800 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-07-21 22:39:19,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-21 22:39:19,833 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-07-21 22:39:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:19,833 INFO L225 Difference]: With dead ends: 79 [2018-07-21 22:39:19,833 INFO L226 Difference]: Without dead ends: 77 [2018-07-21 22:39:19,834 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-07-21 22:39:19,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-21 22:39:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2018-07-21 22:39:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-21 22:39:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-07-21 22:39:19,842 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2018-07-21 22:39:19,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:19,842 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-07-21 22:39:19,842 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-21 22:39:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-07-21 22:39:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-21 22:39:19,843 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:19,843 INFO L358 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:19,843 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:19,843 INFO L82 PathProgramCache]: Analyzing trace with hash 575047023, now seen corresponding path program 19 times [2018-07-21 22:39:19,843 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:19,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:19,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:19,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:19,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:20,213 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:20,214 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:20,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:20,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:20,536 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:20,537 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2018-07-21 22:39:20,537 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-21 22:39:20,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-21 22:39:20,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-07-21 22:39:20,537 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 36 states. [2018-07-21 22:39:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:21,212 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2018-07-21 22:39:21,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-21 22:39:21,212 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 69 [2018-07-21 22:39:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:21,213 INFO L225 Difference]: With dead ends: 121 [2018-07-21 22:39:21,213 INFO L226 Difference]: Without dead ends: 72 [2018-07-21 22:39:21,214 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2018-07-21 22:39:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-21 22:39:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-07-21 22:39:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-21 22:39:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-07-21 22:39:21,225 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2018-07-21 22:39:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:21,225 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-07-21 22:39:21,225 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-21 22:39:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-07-21 22:39:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-21 22:39:21,226 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:21,226 INFO L358 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:21,226 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1582902359, now seen corresponding path program 20 times [2018-07-21 22:39:21,226 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:21,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:21,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:21,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:21,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:21,496 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:21,496 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:21,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:39:21,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:39:21,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:21,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:21,611 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:21,612 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-07-21 22:39:21,612 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-21 22:39:21,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-21 22:39:21,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-07-21 22:39:21,612 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2018-07-21 22:39:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:21,837 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-07-21 22:39:21,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-21 22:39:21,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-07-21 22:39:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:21,838 INFO L225 Difference]: With dead ends: 85 [2018-07-21 22:39:21,838 INFO L226 Difference]: Without dead ends: 83 [2018-07-21 22:39:21,838 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-07-21 22:39:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-21 22:39:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2018-07-21 22:39:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-21 22:39:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-07-21 22:39:21,845 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2018-07-21 22:39:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:21,845 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-07-21 22:39:21,846 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-21 22:39:21,846 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-07-21 22:39:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-21 22:39:21,846 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:21,846 INFO L358 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:21,847 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:21,847 INFO L82 PathProgramCache]: Analyzing trace with hash 238623730, now seen corresponding path program 21 times [2018-07-21 22:39:21,847 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:21,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:21,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:21,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:21,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:22,155 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:22,155 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:22,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:39:22,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-07-21 22:39:22,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:22,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:22,626 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:22,626 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2018-07-21 22:39:22,626 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-21 22:39:22,627 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-21 22:39:22,627 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2018-07-21 22:39:22,627 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 39 states. [2018-07-21 22:39:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:22,916 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-07-21 22:39:22,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-21 22:39:22,916 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2018-07-21 22:39:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:22,917 INFO L225 Difference]: With dead ends: 131 [2018-07-21 22:39:22,917 INFO L226 Difference]: Without dead ends: 78 [2018-07-21 22:39:22,918 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=649, Invalid=2003, Unknown=0, NotChecked=0, Total=2652 [2018-07-21 22:39:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-21 22:39:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-07-21 22:39:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-21 22:39:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-07-21 22:39:22,928 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2018-07-21 22:39:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:22,928 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-07-21 22:39:22,928 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-21 22:39:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-07-21 22:39:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-21 22:39:22,929 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:22,929 INFO L358 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:22,929 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:22,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1479518548, now seen corresponding path program 22 times [2018-07-21 22:39:22,930 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:22,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:22,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:22,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:22,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:23,137 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:23,137 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) [2018-07-21 22:39:23,151 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:23,204 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:39:23,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:23,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:23,345 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:23,345 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-07-21 22:39:23,346 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-21 22:39:23,346 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-21 22:39:23,346 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-07-21 22:39:23,346 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 18 states. [2018-07-21 22:39:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:23,512 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-07-21 22:39:23,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-21 22:39:23,512 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2018-07-21 22:39:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:23,513 INFO L225 Difference]: With dead ends: 91 [2018-07-21 22:39:23,513 INFO L226 Difference]: Without dead ends: 89 [2018-07-21 22:39:23,513 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-07-21 22:39:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-21 22:39:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2018-07-21 22:39:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-21 22:39:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-07-21 22:39:23,522 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2018-07-21 22:39:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:23,522 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-07-21 22:39:23,522 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-21 22:39:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-07-21 22:39:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-21 22:39:23,523 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:23,523 INFO L358 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:23,523 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash 236152181, now seen corresponding path program 23 times [2018-07-21 22:39:23,524 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:23,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:23,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:23,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:23,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:23,988 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:23,988 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:23,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:39:24,030 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-07-21 22:39:24,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:24,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:24,339 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:24,339 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2018-07-21 22:39:24,339 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-21 22:39:24,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-21 22:39:24,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2018-07-21 22:39:24,341 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 42 states. [2018-07-21 22:39:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:24,664 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-07-21 22:39:24,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-21 22:39:24,664 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 81 [2018-07-21 22:39:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:24,665 INFO L225 Difference]: With dead ends: 141 [2018-07-21 22:39:24,665 INFO L226 Difference]: Without dead ends: 84 [2018-07-21 22:39:24,666 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=748, Invalid=2332, Unknown=0, NotChecked=0, Total=3080 [2018-07-21 22:39:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-21 22:39:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-07-21 22:39:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-21 22:39:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-07-21 22:39:24,684 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2018-07-21 22:39:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:24,685 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-07-21 22:39:24,685 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-21 22:39:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-07-21 22:39:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-21 22:39:24,685 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:24,685 INFO L358 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:24,685 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1931357359, now seen corresponding path program 24 times [2018-07-21 22:39:24,686 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:24,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:24,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:24,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:24,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:25,108 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:25,109 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:25,114 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:39:25,148 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-07-21 22:39:25,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:25,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:25,215 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:25,216 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-07-21 22:39:25,216 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-21 22:39:25,216 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-21 22:39:25,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-07-21 22:39:25,216 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 19 states. [2018-07-21 22:39:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:25,422 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-07-21 22:39:25,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-21 22:39:25,422 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-07-21 22:39:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:25,422 INFO L225 Difference]: With dead ends: 97 [2018-07-21 22:39:25,422 INFO L226 Difference]: Without dead ends: 95 [2018-07-21 22:39:25,423 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2018-07-21 22:39:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-21 22:39:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2018-07-21 22:39:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-21 22:39:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-07-21 22:39:25,436 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2018-07-21 22:39:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:25,436 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-07-21 22:39:25,436 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-21 22:39:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-07-21 22:39:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-21 22:39:25,437 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:25,437 INFO L358 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:25,437 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash 850428408, now seen corresponding path program 25 times [2018-07-21 22:39:25,439 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:25,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:25,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:25,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:25,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:25,796 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:25,796 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:25,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:25,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:26,204 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:26,204 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2018-07-21 22:39:26,204 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-21 22:39:26,204 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-21 22:39:26,205 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2018-07-21 22:39:26,205 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 45 states. [2018-07-21 22:39:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:26,573 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-07-21 22:39:26,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-21 22:39:26,573 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 87 [2018-07-21 22:39:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:26,573 INFO L225 Difference]: With dead ends: 151 [2018-07-21 22:39:26,573 INFO L226 Difference]: Without dead ends: 90 [2018-07-21 22:39:26,574 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=854, Invalid=2686, Unknown=0, NotChecked=0, Total=3540 [2018-07-21 22:39:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-21 22:39:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-07-21 22:39:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-21 22:39:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-07-21 22:39:26,584 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2018-07-21 22:39:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:26,584 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-07-21 22:39:26,584 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-21 22:39:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-07-21 22:39:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-21 22:39:26,584 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:26,584 INFO L358 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:26,584 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:26,585 INFO L82 PathProgramCache]: Analyzing trace with hash 477328818, now seen corresponding path program 26 times [2018-07-21 22:39:26,585 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:26,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:26,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:26,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:26,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:26,976 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:26,976 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:26,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:39:27,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:39:27,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:27,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:27,052 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:27,053 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-07-21 22:39:27,053 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-21 22:39:27,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-21 22:39:27,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-07-21 22:39:27,053 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 20 states. [2018-07-21 22:39:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:27,252 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-07-21 22:39:27,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-21 22:39:27,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2018-07-21 22:39:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:27,253 INFO L225 Difference]: With dead ends: 103 [2018-07-21 22:39:27,253 INFO L226 Difference]: Without dead ends: 101 [2018-07-21 22:39:27,254 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=463, Invalid=797, Unknown=0, NotChecked=0, Total=1260 [2018-07-21 22:39:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-21 22:39:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2018-07-21 22:39:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-21 22:39:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-07-21 22:39:27,265 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2018-07-21 22:39:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:27,266 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-07-21 22:39:27,266 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-21 22:39:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-07-21 22:39:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-21 22:39:27,266 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:27,266 INFO L358 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:27,266 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:27,266 INFO L82 PathProgramCache]: Analyzing trace with hash 778277243, now seen corresponding path program 27 times [2018-07-21 22:39:27,267 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:27,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:27,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:27,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:27,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:28,036 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:28,036 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:28,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:39:28,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-07-21 22:39:28,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:28,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:28,542 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:28,542 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2018-07-21 22:39:28,543 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-21 22:39:28,543 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-21 22:39:28,544 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-07-21 22:39:28,544 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 48 states. [2018-07-21 22:39:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:28,957 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-07-21 22:39:28,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-21 22:39:28,957 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 93 [2018-07-21 22:39:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:28,958 INFO L225 Difference]: With dead ends: 161 [2018-07-21 22:39:28,958 INFO L226 Difference]: Without dead ends: 96 [2018-07-21 22:39:28,959 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=967, Invalid=3065, Unknown=0, NotChecked=0, Total=4032 [2018-07-21 22:39:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-21 22:39:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-07-21 22:39:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-21 22:39:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-07-21 22:39:28,976 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2018-07-21 22:39:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:28,976 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-07-21 22:39:28,976 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-21 22:39:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-07-21 22:39:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-21 22:39:28,977 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:28,977 INFO L358 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:28,977 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:28,977 INFO L82 PathProgramCache]: Analyzing trace with hash 942363061, now seen corresponding path program 28 times [2018-07-21 22:39:28,977 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:28,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:28,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:28,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:28,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:29,240 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:29,240 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:29,245 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:39:29,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:39:29,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:29,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:29,333 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:29,334 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-07-21 22:39:29,334 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-21 22:39:29,334 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-21 22:39:29,334 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-07-21 22:39:29,334 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2018-07-21 22:39:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:29,539 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-07-21 22:39:29,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-21 22:39:29,539 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2018-07-21 22:39:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:29,540 INFO L225 Difference]: With dead ends: 109 [2018-07-21 22:39:29,540 INFO L226 Difference]: Without dead ends: 107 [2018-07-21 22:39:29,541 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=889, Unknown=0, NotChecked=0, Total=1406 [2018-07-21 22:39:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-21 22:39:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-07-21 22:39:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-21 22:39:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-07-21 22:39:29,552 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2018-07-21 22:39:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:29,552 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-07-21 22:39:29,552 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-21 22:39:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-07-21 22:39:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-21 22:39:29,553 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:29,553 INFO L358 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:29,553 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1292389378, now seen corresponding path program 29 times [2018-07-21 22:39:29,553 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:29,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:29,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:30,147 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:30,180 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:30,186 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:39:30,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-07-21 22:39:30,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:30,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:30,878 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:30,878 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2018-07-21 22:39:30,878 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-21 22:39:30,879 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-21 22:39:30,879 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2018-07-21 22:39:30,879 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 51 states. [2018-07-21 22:39:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:31,277 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-07-21 22:39:31,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-21 22:39:31,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2018-07-21 22:39:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:31,277 INFO L225 Difference]: With dead ends: 171 [2018-07-21 22:39:31,278 INFO L226 Difference]: Without dead ends: 102 [2018-07-21 22:39:31,280 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1087, Invalid=3469, Unknown=0, NotChecked=0, Total=4556 [2018-07-21 22:39:31,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-21 22:39:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-07-21 22:39:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-21 22:39:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-07-21 22:39:31,304 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-07-21 22:39:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:31,304 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-07-21 22:39:31,304 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-21 22:39:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-07-21 22:39:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-21 22:39:31,305 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:31,305 INFO L358 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:31,305 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:31,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1273438024, now seen corresponding path program 30 times [2018-07-21 22:39:31,305 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:31,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:31,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:31,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:31,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:31,591 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:31,591 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:31,600 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:39:31,641 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-07-21 22:39:31,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:31,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:31,713 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:31,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-07-21 22:39:31,713 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-21 22:39:31,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-21 22:39:31,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-07-21 22:39:31,714 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2018-07-21 22:39:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:31,926 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-07-21 22:39:31,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-21 22:39:31,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2018-07-21 22:39:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:31,927 INFO L225 Difference]: With dead ends: 115 [2018-07-21 22:39:31,927 INFO L226 Difference]: Without dead ends: 113 [2018-07-21 22:39:31,928 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=574, Invalid=986, Unknown=0, NotChecked=0, Total=1560 [2018-07-21 22:39:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-21 22:39:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2018-07-21 22:39:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-21 22:39:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-07-21 22:39:31,945 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2018-07-21 22:39:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:31,945 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-07-21 22:39:31,945 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-21 22:39:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-07-21 22:39:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-21 22:39:31,946 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:31,946 INFO L358 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:31,946 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1336936833, now seen corresponding path program 31 times [2018-07-21 22:39:31,946 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:31,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:31,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:31,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:31,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:32,396 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:32,396 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:32,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:32,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:34,224 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:34,224 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2018-07-21 22:39:34,225 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-21 22:39:34,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-21 22:39:34,226 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-07-21 22:39:34,226 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 54 states. [2018-07-21 22:39:36,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:36,281 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2018-07-21 22:39:36,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-21 22:39:36,281 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 105 [2018-07-21 22:39:36,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:36,282 INFO L225 Difference]: With dead ends: 181 [2018-07-21 22:39:36,282 INFO L226 Difference]: Without dead ends: 108 [2018-07-21 22:39:36,283 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1214, Invalid=3898, Unknown=0, NotChecked=0, Total=5112 [2018-07-21 22:39:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-21 22:39:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-07-21 22:39:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-21 22:39:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-07-21 22:39:36,296 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2018-07-21 22:39:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:36,296 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-07-21 22:39:36,296 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-21 22:39:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-07-21 22:39:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-21 22:39:36,296 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:36,297 INFO L358 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:36,297 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash 898056891, now seen corresponding path program 32 times [2018-07-21 22:39:36,297 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:36,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:36,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:36,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:36,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:36,744 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:36,744 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:36,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:39:36,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:39:36,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:36,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:36,835 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:36,835 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-07-21 22:39:36,835 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-21 22:39:36,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-21 22:39:36,836 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-07-21 22:39:36,836 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2018-07-21 22:39:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:37,090 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-07-21 22:39:37,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-21 22:39:37,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-07-21 22:39:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:37,091 INFO L225 Difference]: With dead ends: 121 [2018-07-21 22:39:37,091 INFO L226 Difference]: Without dead ends: 119 [2018-07-21 22:39:37,092 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=634, Invalid=1088, Unknown=0, NotChecked=0, Total=1722 [2018-07-21 22:39:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-21 22:39:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2018-07-21 22:39:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-21 22:39:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-07-21 22:39:37,107 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2018-07-21 22:39:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:37,107 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-07-21 22:39:37,107 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-21 22:39:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-07-21 22:39:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-21 22:39:37,107 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:37,108 INFO L358 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:37,108 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:37,108 INFO L82 PathProgramCache]: Analyzing trace with hash -817384956, now seen corresponding path program 33 times [2018-07-21 22:39:37,108 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:37,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:37,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:37,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:37,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:38,128 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:38,128 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:38,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:39:38,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-07-21 22:39:38,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:38,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:38,847 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:38,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 57 [2018-07-21 22:39:38,848 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-21 22:39:38,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-21 22:39:38,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2018-07-21 22:39:38,848 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 57 states. [2018-07-21 22:39:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:39,408 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2018-07-21 22:39:39,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-21 22:39:39,408 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 111 [2018-07-21 22:39:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:39,409 INFO L225 Difference]: With dead ends: 191 [2018-07-21 22:39:39,409 INFO L226 Difference]: Without dead ends: 114 [2018-07-21 22:39:39,409 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1348, Invalid=4352, Unknown=0, NotChecked=0, Total=5700 [2018-07-21 22:39:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-21 22:39:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-07-21 22:39:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-21 22:39:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-07-21 22:39:39,423 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-07-21 22:39:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:39,424 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-07-21 22:39:39,424 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-21 22:39:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-07-21 22:39:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-21 22:39:39,424 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:39,424 INFO L358 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:39,424 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:39,425 INFO L82 PathProgramCache]: Analyzing trace with hash -147220546, now seen corresponding path program 34 times [2018-07-21 22:39:39,425 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:39,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:39,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:39,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:39,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:39,834 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:39,834 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:39,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:39:39,874 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:39:39,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:39,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:39,922 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:39,922 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-07-21 22:39:39,922 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-21 22:39:39,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-21 22:39:39,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-07-21 22:39:39,923 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 24 states. [2018-07-21 22:39:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:40,911 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-07-21 22:39:40,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-21 22:39:40,912 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2018-07-21 22:39:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:40,913 INFO L225 Difference]: With dead ends: 127 [2018-07-21 22:39:40,913 INFO L226 Difference]: Without dead ends: 125 [2018-07-21 22:39:40,913 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=697, Invalid=1195, Unknown=0, NotChecked=0, Total=1892 [2018-07-21 22:39:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-21 22:39:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2018-07-21 22:39:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-21 22:39:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-07-21 22:39:40,936 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2018-07-21 22:39:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:40,936 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-07-21 22:39:40,936 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-21 22:39:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-07-21 22:39:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-21 22:39:40,937 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:40,937 INFO L358 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:40,938 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash 368168327, now seen corresponding path program 35 times [2018-07-21 22:39:40,938 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:40,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:40,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:40,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:40,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:42,762 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:42,762 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:42,767 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:39:42,825 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-07-21 22:39:42,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:42,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:43,450 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:43,450 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2018-07-21 22:39:43,451 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-21 22:39:43,451 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-21 22:39:43,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-07-21 22:39:43,452 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 60 states. [2018-07-21 22:39:44,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:44,095 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2018-07-21 22:39:44,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-21 22:39:44,096 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 117 [2018-07-21 22:39:44,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:44,096 INFO L225 Difference]: With dead ends: 201 [2018-07-21 22:39:44,096 INFO L226 Difference]: Without dead ends: 120 [2018-07-21 22:39:44,097 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1489, Invalid=4831, Unknown=0, NotChecked=0, Total=6320 [2018-07-21 22:39:44,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-21 22:39:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-07-21 22:39:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-21 22:39:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-07-21 22:39:44,113 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2018-07-21 22:39:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:44,113 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-07-21 22:39:44,113 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-21 22:39:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-07-21 22:39:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-21 22:39:44,114 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:44,114 INFO L358 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:44,114 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:44,114 INFO L82 PathProgramCache]: Analyzing trace with hash 661323713, now seen corresponding path program 36 times [2018-07-21 22:39:44,114 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:44,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:44,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:44,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:44,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:44,446 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:44,446 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:44,459 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:39:44,511 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-07-21 22:39:44,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:44,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:44,899 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:44,899 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-07-21 22:39:44,900 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-21 22:39:44,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-21 22:39:44,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-07-21 22:39:44,900 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 25 states. [2018-07-21 22:39:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:45,924 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-07-21 22:39:45,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-21 22:39:45,967 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2018-07-21 22:39:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:45,968 INFO L225 Difference]: With dead ends: 133 [2018-07-21 22:39:45,969 INFO L226 Difference]: Without dead ends: 131 [2018-07-21 22:39:45,969 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=763, Invalid=1307, Unknown=0, NotChecked=0, Total=2070 [2018-07-21 22:39:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-21 22:39:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2018-07-21 22:39:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-21 22:39:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-07-21 22:39:45,994 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2018-07-21 22:39:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:45,994 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-07-21 22:39:45,994 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-21 22:39:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-07-21 22:39:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-21 22:39:45,994 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:45,994 INFO L358 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:45,995 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2136570890, now seen corresponding path program 37 times [2018-07-21 22:39:45,995 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:45,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:45,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:45,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:45,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:46,982 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:46,982 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:46,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:47,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:47,638 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:47,638 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2018-07-21 22:39:47,638 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-21 22:39:47,638 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-21 22:39:47,639 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2018-07-21 22:39:47,639 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 63 states. [2018-07-21 22:39:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:48,295 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-07-21 22:39:48,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-21 22:39:48,295 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2018-07-21 22:39:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:48,296 INFO L225 Difference]: With dead ends: 211 [2018-07-21 22:39:48,296 INFO L226 Difference]: Without dead ends: 126 [2018-07-21 22:39:48,297 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1637, Invalid=5335, Unknown=0, NotChecked=0, Total=6972 [2018-07-21 22:39:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-21 22:39:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-07-21 22:39:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-21 22:39:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-07-21 22:39:48,325 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2018-07-21 22:39:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:48,325 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-07-21 22:39:48,325 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-21 22:39:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-07-21 22:39:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-21 22:39:48,326 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:48,326 INFO L358 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:48,326 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:48,327 INFO L82 PathProgramCache]: Analyzing trace with hash -976315708, now seen corresponding path program 38 times [2018-07-21 22:39:48,327 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:48,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:48,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:48,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:48,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:49,165 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:49,165 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:49,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:39:49,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:39:49,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:49,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:49,363 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:49,363 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-07-21 22:39:49,364 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-21 22:39:49,364 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-21 22:39:49,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-07-21 22:39:49,364 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 26 states. [2018-07-21 22:39:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:49,672 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-07-21 22:39:49,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-21 22:39:49,673 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2018-07-21 22:39:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:49,673 INFO L225 Difference]: With dead ends: 139 [2018-07-21 22:39:49,673 INFO L226 Difference]: Without dead ends: 137 [2018-07-21 22:39:49,674 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=832, Invalid=1424, Unknown=0, NotChecked=0, Total=2256 [2018-07-21 22:39:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-21 22:39:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2018-07-21 22:39:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-21 22:39:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-07-21 22:39:49,703 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2018-07-21 22:39:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:49,703 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-07-21 22:39:49,703 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-21 22:39:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-07-21 22:39:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-21 22:39:49,704 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:49,704 INFO L358 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:49,704 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1130242675, now seen corresponding path program 39 times [2018-07-21 22:39:49,704 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:49,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:49,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:49,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:49,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:51,074 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:51,103 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:51,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:39:51,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-07-21 22:39:51,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:51,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:51,848 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:51,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2018-07-21 22:39:51,849 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-21 22:39:51,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-21 22:39:51,850 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2018-07-21 22:39:51,850 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 66 states. [2018-07-21 22:39:52,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:52,618 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-07-21 22:39:52,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-21 22:39:52,618 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 129 [2018-07-21 22:39:52,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:52,619 INFO L225 Difference]: With dead ends: 221 [2018-07-21 22:39:52,619 INFO L226 Difference]: Without dead ends: 132 [2018-07-21 22:39:52,620 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1792, Invalid=5864, Unknown=0, NotChecked=0, Total=7656 [2018-07-21 22:39:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-21 22:39:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-07-21 22:39:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-21 22:39:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-07-21 22:39:52,651 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-07-21 22:39:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:52,651 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-07-21 22:39:52,651 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-21 22:39:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-07-21 22:39:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-21 22:39:52,652 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:52,652 INFO L358 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:52,652 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:52,652 INFO L82 PathProgramCache]: Analyzing trace with hash 26183879, now seen corresponding path program 40 times [2018-07-21 22:39:52,653 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:52,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:52,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:52,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:52,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:52,951 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:52,952 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:52,957 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:39:53,000 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:39:53,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:53,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:53,106 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:53,106 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-07-21 22:39:53,107 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-21 22:39:53,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-21 22:39:53,107 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-07-21 22:39:53,107 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 27 states. [2018-07-21 22:39:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:53,415 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-07-21 22:39:53,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-21 22:39:53,415 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2018-07-21 22:39:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:53,416 INFO L225 Difference]: With dead ends: 145 [2018-07-21 22:39:53,416 INFO L226 Difference]: Without dead ends: 143 [2018-07-21 22:39:53,417 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=904, Invalid=1546, Unknown=0, NotChecked=0, Total=2450 [2018-07-21 22:39:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-21 22:39:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2018-07-21 22:39:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-21 22:39:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-07-21 22:39:53,448 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2018-07-21 22:39:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:53,448 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-07-21 22:39:53,448 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-21 22:39:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-07-21 22:39:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-21 22:39:53,449 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:53,449 INFO L358 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:53,449 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash 845550096, now seen corresponding path program 41 times [2018-07-21 22:39:53,449 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:53,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:53,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:53,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:53,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:54,161 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:54,161 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:54,168 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:39:54,226 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-07-21 22:39:54,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:54,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:54,955 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:54,955 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2018-07-21 22:39:54,956 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-21 22:39:54,956 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-21 22:39:54,956 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2018-07-21 22:39:54,956 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 69 states. [2018-07-21 22:39:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:55,732 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2018-07-21 22:39:55,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-21 22:39:55,733 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 135 [2018-07-21 22:39:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:55,733 INFO L225 Difference]: With dead ends: 231 [2018-07-21 22:39:55,733 INFO L226 Difference]: Without dead ends: 138 [2018-07-21 22:39:55,734 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1954, Invalid=6418, Unknown=0, NotChecked=0, Total=8372 [2018-07-21 22:39:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-21 22:39:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-07-21 22:39:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-21 22:39:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-07-21 22:39:55,763 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2018-07-21 22:39:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:55,763 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-07-21 22:39:55,763 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-21 22:39:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-07-21 22:39:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-21 22:39:55,764 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:55,764 INFO L358 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:55,764 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:55,764 INFO L82 PathProgramCache]: Analyzing trace with hash 391178698, now seen corresponding path program 42 times [2018-07-21 22:39:55,764 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:55,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:55,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:55,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:55,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:56,236 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:56,270 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:39:56,277 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:39:56,336 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-07-21 22:39:56,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:39:56,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:56,423 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:56,423 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-07-21 22:39:56,424 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-21 22:39:56,424 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-21 22:39:56,424 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-07-21 22:39:56,424 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 28 states. [2018-07-21 22:39:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:56,743 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-07-21 22:39:56,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-21 22:39:56,744 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2018-07-21 22:39:56,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:56,744 INFO L225 Difference]: With dead ends: 151 [2018-07-21 22:39:56,744 INFO L226 Difference]: Without dead ends: 149 [2018-07-21 22:39:56,745 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=979, Invalid=1673, Unknown=0, NotChecked=0, Total=2652 [2018-07-21 22:39:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-21 22:39:56,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2018-07-21 22:39:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-21 22:39:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-07-21 22:39:56,771 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2018-07-21 22:39:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:56,771 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-07-21 22:39:56,771 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-21 22:39:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-07-21 22:39:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-21 22:39:56,771 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:56,772 INFO L358 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:56,772 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:56,772 INFO L82 PathProgramCache]: Analyzing trace with hash -692504173, now seen corresponding path program 43 times [2018-07-21 22:39:56,772 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:56,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:56,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:56,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:39:56,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:57,475 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:39:57,475 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:39:57,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:39:57,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:39:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:39:58,329 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:39:58,329 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2018-07-21 22:39:58,330 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-21 22:39:58,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-21 22:39:58,330 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-07-21 22:39:58,330 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 72 states. [2018-07-21 22:39:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:39:59,155 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-07-21 22:39:59,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-21 22:39:59,155 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 141 [2018-07-21 22:39:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:39:59,156 INFO L225 Difference]: With dead ends: 241 [2018-07-21 22:39:59,156 INFO L226 Difference]: Without dead ends: 144 [2018-07-21 22:39:59,157 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2123, Invalid=6997, Unknown=0, NotChecked=0, Total=9120 [2018-07-21 22:39:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-21 22:39:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-07-21 22:39:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-21 22:39:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-07-21 22:39:59,177 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-07-21 22:39:59,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:39:59,177 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-07-21 22:39:59,177 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-21 22:39:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-07-21 22:39:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-21 22:39:59,178 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:39:59,178 INFO L358 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-07-21 22:39:59,178 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:39:59,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1355948595, now seen corresponding path program 44 times [2018-07-21 22:39:59,178 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:39:59,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:39:59,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:59,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:39:59,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:39:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:00,192 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:00,192 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:00,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:40:00,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:40:00,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:00,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:00,466 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:00,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-07-21 22:40:00,466 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-21 22:40:00,466 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-21 22:40:00,466 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-07-21 22:40:00,467 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 29 states. [2018-07-21 22:40:00,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:00,800 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-07-21 22:40:00,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-21 22:40:00,800 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 143 [2018-07-21 22:40:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:00,800 INFO L225 Difference]: With dead ends: 157 [2018-07-21 22:40:00,801 INFO L226 Difference]: Without dead ends: 155 [2018-07-21 22:40:00,801 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1057, Invalid=1805, Unknown=0, NotChecked=0, Total=2862 [2018-07-21 22:40:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-21 22:40:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-07-21 22:40:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-21 22:40:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-07-21 22:40:00,823 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2018-07-21 22:40:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:00,824 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-07-21 22:40:00,824 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-21 22:40:00,824 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-07-21 22:40:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-21 22:40:00,824 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:00,824 INFO L358 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:00,824 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1893305322, now seen corresponding path program 45 times [2018-07-21 22:40:00,825 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:00,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:00,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:00,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:00,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:02,017 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:02,017 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:02,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:40:02,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-07-21 22:40:02,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:02,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:03,669 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:03,669 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2018-07-21 22:40:03,669 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-21 22:40:03,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-21 22:40:03,670 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2018-07-21 22:40:03,670 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 75 states. [2018-07-21 22:40:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:04,566 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2018-07-21 22:40:04,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-21 22:40:04,566 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2018-07-21 22:40:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:04,567 INFO L225 Difference]: With dead ends: 251 [2018-07-21 22:40:04,567 INFO L226 Difference]: Without dead ends: 150 [2018-07-21 22:40:04,568 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2299, Invalid=7601, Unknown=0, NotChecked=0, Total=9900 [2018-07-21 22:40:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-21 22:40:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-07-21 22:40:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-21 22:40:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-07-21 22:40:04,590 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-07-21 22:40:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:04,590 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-07-21 22:40:04,590 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-21 22:40:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-07-21 22:40:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-21 22:40:04,591 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:04,591 INFO L358 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:04,591 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1162246960, now seen corresponding path program 46 times [2018-07-21 22:40:04,591 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:04,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:04,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:04,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:04,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:05,009 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:05,009 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:05,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:40:05,065 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:40:05,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:05,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:05,150 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:05,151 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-07-21 22:40:05,151 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-21 22:40:05,151 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-21 22:40:05,151 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-07-21 22:40:05,151 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 30 states. [2018-07-21 22:40:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:05,506 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2018-07-21 22:40:05,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-21 22:40:05,506 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2018-07-21 22:40:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:05,507 INFO L225 Difference]: With dead ends: 163 [2018-07-21 22:40:05,507 INFO L226 Difference]: Without dead ends: 161 [2018-07-21 22:40:05,507 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1138, Invalid=1942, Unknown=0, NotChecked=0, Total=3080 [2018-07-21 22:40:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-21 22:40:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2018-07-21 22:40:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-21 22:40:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-07-21 22:40:05,531 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2018-07-21 22:40:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:05,532 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-07-21 22:40:05,532 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-21 22:40:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-07-21 22:40:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-21 22:40:05,532 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:05,533 INFO L358 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:05,533 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:05,533 INFO L82 PathProgramCache]: Analyzing trace with hash 246473113, now seen corresponding path program 47 times [2018-07-21 22:40:05,533 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:05,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:05,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:05,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:05,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:06,529 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:06,529 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:06,535 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:40:06,606 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-07-21 22:40:06,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:06,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:07,518 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:07,518 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2018-07-21 22:40:07,518 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-21 22:40:07,519 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-21 22:40:07,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2018-07-21 22:40:07,519 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 78 states. [2018-07-21 22:40:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:08,369 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2018-07-21 22:40:08,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-21 22:40:08,369 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 153 [2018-07-21 22:40:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:08,370 INFO L225 Difference]: With dead ends: 261 [2018-07-21 22:40:08,370 INFO L226 Difference]: Without dead ends: 156 [2018-07-21 22:40:08,371 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2482, Invalid=8230, Unknown=0, NotChecked=0, Total=10712 [2018-07-21 22:40:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-21 22:40:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-07-21 22:40:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-21 22:40:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-07-21 22:40:08,396 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2018-07-21 22:40:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:08,396 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-07-21 22:40:08,396 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-21 22:40:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-07-21 22:40:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-21 22:40:08,397 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:08,397 INFO L358 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:08,397 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:08,397 INFO L82 PathProgramCache]: Analyzing trace with hash -755040557, now seen corresponding path program 48 times [2018-07-21 22:40:08,398 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:08,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:08,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:08,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:08,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:09,052 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:09,052 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:40:09,058 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:40:09,127 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-07-21 22:40:09,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:09,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:09,184 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:09,184 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-07-21 22:40:09,184 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-21 22:40:09,184 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-21 22:40:09,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-07-21 22:40:09,185 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 31 states. [2018-07-21 22:40:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:09,562 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-07-21 22:40:09,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-21 22:40:09,562 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 155 [2018-07-21 22:40:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:09,563 INFO L225 Difference]: With dead ends: 169 [2018-07-21 22:40:09,563 INFO L226 Difference]: Without dead ends: 167 [2018-07-21 22:40:09,563 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1222, Invalid=2084, Unknown=0, NotChecked=0, Total=3306 [2018-07-21 22:40:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-21 22:40:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2018-07-21 22:40:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-21 22:40:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-07-21 22:40:09,589 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2018-07-21 22:40:09,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:09,589 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-07-21 22:40:09,589 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-21 22:40:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-07-21 22:40:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-21 22:40:09,590 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:09,590 INFO L358 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:09,591 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash 869507612, now seen corresponding path program 49 times [2018-07-21 22:40:09,591 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:09,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:09,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:09,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:09,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:10,621 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:10,621 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:10,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:40:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:10,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:11,848 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:11,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2018-07-21 22:40:11,849 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-21 22:40:11,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-21 22:40:11,849 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2018-07-21 22:40:11,849 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 81 states. [2018-07-21 22:40:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:12,884 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-07-21 22:40:12,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-21 22:40:12,884 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 159 [2018-07-21 22:40:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:12,885 INFO L225 Difference]: With dead ends: 271 [2018-07-21 22:40:12,885 INFO L226 Difference]: Without dead ends: 162 [2018-07-21 22:40:12,886 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2672, Invalid=8884, Unknown=0, NotChecked=0, Total=11556 [2018-07-21 22:40:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-21 22:40:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-07-21 22:40:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-21 22:40:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-07-21 22:40:12,912 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-07-21 22:40:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:12,912 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-07-21 22:40:12,912 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-21 22:40:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-07-21 22:40:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-21 22:40:12,912 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:12,913 INFO L358 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:12,913 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash 377580502, now seen corresponding path program 50 times [2018-07-21 22:40:12,913 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:12,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:12,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:12,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:40:12,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:13,292 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:13,292 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:40:13,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:40:13,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:40:13,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:13,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:13,710 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:13,710 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-07-21 22:40:13,711 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-21 22:40:13,711 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-21 22:40:13,711 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-07-21 22:40:13,711 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 32 states. [2018-07-21 22:40:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:14,095 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2018-07-21 22:40:14,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-21 22:40:14,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2018-07-21 22:40:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:14,096 INFO L225 Difference]: With dead ends: 175 [2018-07-21 22:40:14,096 INFO L226 Difference]: Without dead ends: 173 [2018-07-21 22:40:14,096 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1309, Invalid=2231, Unknown=0, NotChecked=0, Total=3540 [2018-07-21 22:40:14,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-21 22:40:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2018-07-21 22:40:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-21 22:40:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-07-21 22:40:14,123 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2018-07-21 22:40:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:14,124 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-07-21 22:40:14,124 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-21 22:40:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-07-21 22:40:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-21 22:40:14,124 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:14,124 INFO L358 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:14,124 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:14,125 INFO L82 PathProgramCache]: Analyzing trace with hash -427698785, now seen corresponding path program 51 times [2018-07-21 22:40:14,125 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:14,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:14,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:14,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:14,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:14,977 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:14,977 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:40:14,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:40:15,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-07-21 22:40:15,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:15,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:16,145 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:16,145 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2018-07-21 22:40:16,145 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-21 22:40:16,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-21 22:40:16,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-07-21 22:40:16,146 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 84 states. [2018-07-21 22:40:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:17,272 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-07-21 22:40:17,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-21 22:40:17,272 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 165 [2018-07-21 22:40:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:17,273 INFO L225 Difference]: With dead ends: 281 [2018-07-21 22:40:17,273 INFO L226 Difference]: Without dead ends: 168 [2018-07-21 22:40:17,274 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2869, Invalid=9563, Unknown=0, NotChecked=0, Total=12432 [2018-07-21 22:40:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-21 22:40:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-07-21 22:40:17,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-21 22:40:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-07-21 22:40:17,301 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2018-07-21 22:40:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:17,301 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-07-21 22:40:17,301 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-21 22:40:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-07-21 22:40:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-21 22:40:17,302 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:17,302 INFO L358 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:17,302 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2026116135, now seen corresponding path program 52 times [2018-07-21 22:40:17,302 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:17,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:17,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:17,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:17,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:17,689 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:17,689 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:17,704 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:40:17,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:40:17,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:17,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:17,958 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:17,958 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-07-21 22:40:17,958 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-21 22:40:17,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-21 22:40:17,958 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-07-21 22:40:17,959 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 33 states. [2018-07-21 22:40:18,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:18,378 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-07-21 22:40:18,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-21 22:40:18,378 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 167 [2018-07-21 22:40:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:18,379 INFO L225 Difference]: With dead ends: 181 [2018-07-21 22:40:18,379 INFO L226 Difference]: Without dead ends: 179 [2018-07-21 22:40:18,379 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1399, Invalid=2383, Unknown=0, NotChecked=0, Total=3782 [2018-07-21 22:40:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-21 22:40:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2018-07-21 22:40:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-21 22:40:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2018-07-21 22:40:18,413 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2018-07-21 22:40:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:18,413 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2018-07-21 22:40:18,413 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-21 22:40:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2018-07-21 22:40:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-21 22:40:18,414 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:18,414 INFO L358 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:18,414 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1982241826, now seen corresponding path program 53 times [2018-07-21 22:40:18,415 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:18,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:18,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:18,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:18,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:19,331 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:19,331 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:19,336 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:40:19,415 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-07-21 22:40:19,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:19,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:20,507 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:20,507 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 87 [2018-07-21 22:40:20,508 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-21 22:40:20,508 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-21 22:40:20,508 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2018-07-21 22:40:20,508 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 87 states. [2018-07-21 22:40:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:21,706 INFO L93 Difference]: Finished difference Result 291 states and 293 transitions. [2018-07-21 22:40:21,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-21 22:40:21,706 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 171 [2018-07-21 22:40:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:21,707 INFO L225 Difference]: With dead ends: 291 [2018-07-21 22:40:21,707 INFO L226 Difference]: Without dead ends: 174 [2018-07-21 22:40:21,708 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2674 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3073, Invalid=10267, Unknown=0, NotChecked=0, Total=13340 [2018-07-21 22:40:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-21 22:40:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-07-21 22:40:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-21 22:40:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-07-21 22:40:21,746 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2018-07-21 22:40:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:21,746 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-07-21 22:40:21,746 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-21 22:40:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-07-21 22:40:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-21 22:40:21,747 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:21,747 INFO L358 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:21,747 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:21,747 INFO L82 PathProgramCache]: Analyzing trace with hash -392061220, now seen corresponding path program 54 times [2018-07-21 22:40:21,747 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:21,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:21,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:21,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:21,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:22,139 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:22,139 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:22,155 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:40:22,234 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-07-21 22:40:22,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:22,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:22,298 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:22,298 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-07-21 22:40:22,299 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-21 22:40:22,299 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-21 22:40:22,299 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-07-21 22:40:22,299 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 34 states. [2018-07-21 22:40:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:22,732 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2018-07-21 22:40:22,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-21 22:40:22,732 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2018-07-21 22:40:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:22,733 INFO L225 Difference]: With dead ends: 187 [2018-07-21 22:40:22,733 INFO L226 Difference]: Without dead ends: 185 [2018-07-21 22:40:22,733 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1492, Invalid=2540, Unknown=0, NotChecked=0, Total=4032 [2018-07-21 22:40:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-21 22:40:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2018-07-21 22:40:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-21 22:40:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-07-21 22:40:22,769 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2018-07-21 22:40:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:22,769 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-07-21 22:40:22,769 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-21 22:40:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-07-21 22:40:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-21 22:40:22,770 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:22,771 INFO L358 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:22,771 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2007307685, now seen corresponding path program 55 times [2018-07-21 22:40:22,771 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:22,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:22,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:22,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:22,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:23,751 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:23,751 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) [2018-07-21 22:40:23,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:40:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:23,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:25,077 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:25,078 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 90 [2018-07-21 22:40:25,078 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-21 22:40:25,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-21 22:40:25,078 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2018-07-21 22:40:25,079 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 90 states. [2018-07-21 22:40:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:26,068 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-07-21 22:40:26,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-21 22:40:26,069 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 177 [2018-07-21 22:40:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:26,069 INFO L225 Difference]: With dead ends: 301 [2018-07-21 22:40:26,069 INFO L226 Difference]: Without dead ends: 180 [2018-07-21 22:40:26,070 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3284, Invalid=10996, Unknown=0, NotChecked=0, Total=14280 [2018-07-21 22:40:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-21 22:40:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-07-21 22:40:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-21 22:40:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2018-07-21 22:40:26,120 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2018-07-21 22:40:26,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:26,120 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2018-07-21 22:40:26,120 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-21 22:40:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2018-07-21 22:40:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-21 22:40:26,121 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:26,122 INFO L358 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:26,122 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:26,122 INFO L82 PathProgramCache]: Analyzing trace with hash 496870623, now seen corresponding path program 56 times [2018-07-21 22:40:26,122 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:26,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:26,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:26,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:40:26,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:26,749 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:26,749 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:26,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:40:26,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:40:26,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:26,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:26,924 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:26,925 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-07-21 22:40:26,925 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-21 22:40:26,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-21 22:40:26,925 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-07-21 22:40:26,926 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 35 states. [2018-07-21 22:40:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:27,432 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-07-21 22:40:27,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-21 22:40:27,432 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 179 [2018-07-21 22:40:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:27,433 INFO L225 Difference]: With dead ends: 193 [2018-07-21 22:40:27,433 INFO L226 Difference]: Without dead ends: 191 [2018-07-21 22:40:27,434 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1588, Invalid=2702, Unknown=0, NotChecked=0, Total=4290 [2018-07-21 22:40:27,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-07-21 22:40:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2018-07-21 22:40:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-07-21 22:40:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-07-21 22:40:27,476 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2018-07-21 22:40:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:27,476 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-07-21 22:40:27,476 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-21 22:40:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-07-21 22:40:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-07-21 22:40:27,477 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:27,477 INFO L358 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:27,477 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash 592994856, now seen corresponding path program 57 times [2018-07-21 22:40:27,478 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:27,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:27,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:27,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:27,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:28,533 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:28,533 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:28,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:40:28,623 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-07-21 22:40:28,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:28,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:29,955 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:29,955 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 93 [2018-07-21 22:40:29,955 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-21 22:40:29,955 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-21 22:40:29,956 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=6573, Unknown=0, NotChecked=0, Total=8556 [2018-07-21 22:40:29,956 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 93 states. [2018-07-21 22:40:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:31,430 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2018-07-21 22:40:31,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-21 22:40:31,430 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 183 [2018-07-21 22:40:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:31,431 INFO L225 Difference]: With dead ends: 311 [2018-07-21 22:40:31,431 INFO L226 Difference]: Without dead ends: 186 [2018-07-21 22:40:31,432 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3502, Invalid=11750, Unknown=0, NotChecked=0, Total=15252 [2018-07-21 22:40:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-07-21 22:40:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-07-21 22:40:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-07-21 22:40:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-07-21 22:40:31,477 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2018-07-21 22:40:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:31,477 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-07-21 22:40:31,477 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-21 22:40:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-07-21 22:40:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-07-21 22:40:31,478 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:31,478 INFO L358 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:31,478 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:31,478 INFO L82 PathProgramCache]: Analyzing trace with hash 110304738, now seen corresponding path program 58 times [2018-07-21 22:40:31,478 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:31,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:31,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:31,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:31,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:32,041 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:32,041 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:32,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:40:32,105 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:40:32,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:32,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:32,221 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:32,221 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-07-21 22:40:32,221 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-21 22:40:32,221 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-21 22:40:32,221 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-07-21 22:40:32,222 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 36 states. [2018-07-21 22:40:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:32,696 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2018-07-21 22:40:32,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-21 22:40:32,696 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 185 [2018-07-21 22:40:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:32,697 INFO L225 Difference]: With dead ends: 199 [2018-07-21 22:40:32,697 INFO L226 Difference]: Without dead ends: 197 [2018-07-21 22:40:32,697 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1687, Invalid=2869, Unknown=0, NotChecked=0, Total=4556 [2018-07-21 22:40:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-07-21 22:40:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2018-07-21 22:40:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-07-21 22:40:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-07-21 22:40:32,733 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2018-07-21 22:40:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:32,733 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-07-21 22:40:32,733 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-21 22:40:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-07-21 22:40:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-07-21 22:40:32,734 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:32,735 INFO L358 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:32,735 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:32,735 INFO L82 PathProgramCache]: Analyzing trace with hash 856924587, now seen corresponding path program 59 times [2018-07-21 22:40:32,735 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:32,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:32,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:32,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:32,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:33,847 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:33,848 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:33,854 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:40:33,943 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-07-21 22:40:33,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:33,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:35,402 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:35,402 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 96 [2018-07-21 22:40:35,402 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-21 22:40:35,402 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-21 22:40:35,403 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-07-21 22:40:35,403 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 96 states. [2018-07-21 22:40:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:36,527 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2018-07-21 22:40:36,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-21 22:40:36,527 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 189 [2018-07-21 22:40:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:36,528 INFO L225 Difference]: With dead ends: 321 [2018-07-21 22:40:36,528 INFO L226 Difference]: Without dead ends: 192 [2018-07-21 22:40:36,528 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3727, Invalid=12529, Unknown=0, NotChecked=0, Total=16256 [2018-07-21 22:40:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-07-21 22:40:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-07-21 22:40:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-07-21 22:40:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2018-07-21 22:40:36,573 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2018-07-21 22:40:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:36,573 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2018-07-21 22:40:36,573 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-21 22:40:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2018-07-21 22:40:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-07-21 22:40:36,574 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:36,574 INFO L358 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:36,574 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash -547542555, now seen corresponding path program 60 times [2018-07-21 22:40:36,574 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:36,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:36,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:36,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:36,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:37,136 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:37,136 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:37,144 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:40:37,235 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-07-21 22:40:37,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:37,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:37,301 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:37,302 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-07-21 22:40:37,302 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-21 22:40:37,302 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-21 22:40:37,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-07-21 22:40:37,302 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 37 states. [2018-07-21 22:40:37,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:37,781 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-07-21 22:40:37,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-21 22:40:37,782 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2018-07-21 22:40:37,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:37,782 INFO L225 Difference]: With dead ends: 205 [2018-07-21 22:40:37,783 INFO L226 Difference]: Without dead ends: 203 [2018-07-21 22:40:37,783 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1789, Invalid=3041, Unknown=0, NotChecked=0, Total=4830 [2018-07-21 22:40:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-07-21 22:40:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2018-07-21 22:40:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-07-21 22:40:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-07-21 22:40:37,828 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2018-07-21 22:40:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:37,828 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-07-21 22:40:37,828 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-21 22:40:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-07-21 22:40:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-07-21 22:40:37,830 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:37,830 INFO L358 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:37,830 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:37,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1075967022, now seen corresponding path program 61 times [2018-07-21 22:40:37,830 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:37,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:37,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:37,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:37,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:38,972 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:38,972 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:38,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:40:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:39,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:40,477 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:40,478 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 99 [2018-07-21 22:40:40,478 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-21 22:40:40,478 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-21 22:40:40,479 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2243, Invalid=7459, Unknown=0, NotChecked=0, Total=9702 [2018-07-21 22:40:40,479 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 99 states. [2018-07-21 22:40:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:42,007 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-07-21 22:40:42,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-21 22:40:42,007 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 195 [2018-07-21 22:40:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:42,007 INFO L225 Difference]: With dead ends: 331 [2018-07-21 22:40:42,008 INFO L226 Difference]: Without dead ends: 198 [2018-07-21 22:40:42,008 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3504 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-07-21 22:40:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-07-21 22:40:42,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-07-21 22:40:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-07-21 22:40:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2018-07-21 22:40:42,050 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2018-07-21 22:40:42,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:42,050 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2018-07-21 22:40:42,050 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-21 22:40:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2018-07-21 22:40:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-07-21 22:40:42,053 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:42,054 INFO L358 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:42,054 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:42,054 INFO L82 PathProgramCache]: Analyzing trace with hash 491710696, now seen corresponding path program 62 times [2018-07-21 22:40:42,054 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:42,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:42,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:42,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:40:42,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:42,662 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:42,662 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:42,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:40:42,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:40:42,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:42,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:42,833 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:42,833 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-07-21 22:40:42,833 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-21 22:40:42,834 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-21 22:40:42,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-07-21 22:40:42,834 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 38 states. [2018-07-21 22:40:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:43,360 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2018-07-21 22:40:43,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-21 22:40:43,360 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2018-07-21 22:40:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:43,361 INFO L225 Difference]: With dead ends: 211 [2018-07-21 22:40:43,361 INFO L226 Difference]: Without dead ends: 209 [2018-07-21 22:40:43,362 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1894, Invalid=3218, Unknown=0, NotChecked=0, Total=5112 [2018-07-21 22:40:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-07-21 22:40:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2018-07-21 22:40:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-07-21 22:40:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-07-21 22:40:43,403 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2018-07-21 22:40:43,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:43,403 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-07-21 22:40:43,403 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-21 22:40:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-07-21 22:40:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-21 22:40:43,404 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:43,404 INFO L358 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:43,404 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1589216847, now seen corresponding path program 63 times [2018-07-21 22:40:43,405 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:43,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:43,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:43,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:43,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:44,671 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:44,672 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:40:44,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:40:44,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-07-21 22:40:44,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:44,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:46,287 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:46,287 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 102 [2018-07-21 22:40:46,288 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-21 22:40:46,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-21 22:40:46,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=7923, Unknown=0, NotChecked=0, Total=10302 [2018-07-21 22:40:46,288 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 102 states. [2018-07-21 22:40:47,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:47,904 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2018-07-21 22:40:47,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-21 22:40:47,939 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 201 [2018-07-21 22:40:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:47,940 INFO L225 Difference]: With dead ends: 341 [2018-07-21 22:40:47,940 INFO L226 Difference]: Without dead ends: 204 [2018-07-21 22:40:47,941 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3729 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4198, Invalid=14162, Unknown=0, NotChecked=0, Total=18360 [2018-07-21 22:40:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-07-21 22:40:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-07-21 22:40:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-07-21 22:40:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-07-21 22:40:47,981 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2018-07-21 22:40:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:47,981 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-07-21 22:40:47,982 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-21 22:40:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-07-21 22:40:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-21 22:40:47,982 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:47,982 INFO L358 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:47,983 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash -852264213, now seen corresponding path program 64 times [2018-07-21 22:40:47,983 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:47,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:47,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:47,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:47,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:48,611 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:48,611 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:48,618 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:40:48,679 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:40:48,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:48,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:49,001 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:49,002 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-07-21 22:40:49,002 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-21 22:40:49,002 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-21 22:40:49,002 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-07-21 22:40:49,002 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 39 states. [2018-07-21 22:40:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:49,562 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-07-21 22:40:49,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-21 22:40:49,562 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 203 [2018-07-21 22:40:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:49,563 INFO L225 Difference]: With dead ends: 217 [2018-07-21 22:40:49,563 INFO L226 Difference]: Without dead ends: 215 [2018-07-21 22:40:49,564 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2002, Invalid=3400, Unknown=0, NotChecked=0, Total=5402 [2018-07-21 22:40:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-07-21 22:40:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 208. [2018-07-21 22:40:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-07-21 22:40:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-07-21 22:40:49,609 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2018-07-21 22:40:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:49,609 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-07-21 22:40:49,609 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-21 22:40:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-07-21 22:40:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-07-21 22:40:49,610 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:49,610 INFO L358 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:49,610 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash -927182284, now seen corresponding path program 65 times [2018-07-21 22:40:49,610 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:49,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:49,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:49,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:49,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:50,927 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:50,927 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:50,932 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:40:51,033 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-07-21 22:40:51,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:51,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:52,625 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:52,625 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 105 [2018-07-21 22:40:52,626 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-21 22:40:52,626 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-21 22:40:52,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2519, Invalid=8401, Unknown=0, NotChecked=0, Total=10920 [2018-07-21 22:40:52,626 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 105 states. [2018-07-21 22:40:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:54,358 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2018-07-21 22:40:54,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-21 22:40:54,358 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 207 [2018-07-21 22:40:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:54,359 INFO L225 Difference]: With dead ends: 351 [2018-07-21 22:40:54,359 INFO L226 Difference]: Without dead ends: 210 [2018-07-21 22:40:54,360 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4444, Invalid=15016, Unknown=0, NotChecked=0, Total=19460 [2018-07-21 22:40:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-07-21 22:40:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-07-21 22:40:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-07-21 22:40:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-07-21 22:40:54,407 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-07-21 22:40:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:54,407 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-07-21 22:40:54,407 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-21 22:40:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-07-21 22:40:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-21 22:40:54,408 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:54,408 INFO L358 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:54,408 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1900937198, now seen corresponding path program 66 times [2018-07-21 22:40:54,408 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:54,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:54,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:54,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:54,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:55,095 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:55,096 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-07-21 22:40:55,101 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:40:55,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-07-21 22:40:55,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:40:55,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:55,285 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:55,285 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-07-21 22:40:55,285 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-21 22:40:55,285 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-21 22:40:55,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-07-21 22:40:55,286 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 40 states. [2018-07-21 22:40:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:40:55,850 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2018-07-21 22:40:55,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-21 22:40:55,850 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 209 [2018-07-21 22:40:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:40:55,851 INFO L225 Difference]: With dead ends: 223 [2018-07-21 22:40:55,851 INFO L226 Difference]: Without dead ends: 221 [2018-07-21 22:40:55,852 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2113, Invalid=3587, Unknown=0, NotChecked=0, Total=5700 [2018-07-21 22:40:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-07-21 22:40:55,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2018-07-21 22:40:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-21 22:40:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-07-21 22:40:55,911 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2018-07-21 22:40:55,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:40:55,912 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-07-21 22:40:55,912 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-21 22:40:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-07-21 22:40:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-07-21 22:40:55,913 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:40:55,913 INFO L358 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-07-21 22:40:55,913 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:40:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash 574004663, now seen corresponding path program 67 times [2018-07-21 22:40:55,913 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:40:55,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:40:55,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:55,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:40:55,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:40:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:57,283 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:40:57,283 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:40:57,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:40:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:40:57,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:40:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:40:59,016 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:40:59,017 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 108 [2018-07-21 22:40:59,017 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-21 22:40:59,017 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-21 22:40:59,018 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-07-21 22:40:59,018 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 108 states. [2018-07-21 22:41:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:00,856 INFO L93 Difference]: Finished difference Result 361 states and 363 transitions. [2018-07-21 22:41:00,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-21 22:41:00,856 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 213 [2018-07-21 22:41:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:00,857 INFO L225 Difference]: With dead ends: 361 [2018-07-21 22:41:00,857 INFO L226 Difference]: Without dead ends: 216 [2018-07-21 22:41:00,858 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4200 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4697, Invalid=15895, Unknown=0, NotChecked=0, Total=20592 [2018-07-21 22:41:00,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-07-21 22:41:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-07-21 22:41:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-07-21 22:41:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-07-21 22:41:00,902 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2018-07-21 22:41:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:00,902 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-07-21 22:41:00,902 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-21 22:41:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-07-21 22:41:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-07-21 22:41:00,903 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:00,903 INFO L358 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:00,903 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:00,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1599707121, now seen corresponding path program 68 times [2018-07-21 22:41:00,904 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:00,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:00,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:00,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:41:00,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:01,444 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:01,444 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:01,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:41:01,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:41:01,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:01,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:01,587 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:01,588 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-07-21 22:41:01,588 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-21 22:41:01,588 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-21 22:41:01,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-07-21 22:41:01,588 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 41 states. [2018-07-21 22:41:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:02,175 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-07-21 22:41:02,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-21 22:41:02,175 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 215 [2018-07-21 22:41:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:02,176 INFO L225 Difference]: With dead ends: 229 [2018-07-21 22:41:02,176 INFO L226 Difference]: Without dead ends: 227 [2018-07-21 22:41:02,176 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2227, Invalid=3779, Unknown=0, NotChecked=0, Total=6006 [2018-07-21 22:41:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-07-21 22:41:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2018-07-21 22:41:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-07-21 22:41:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-07-21 22:41:02,224 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2018-07-21 22:41:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:02,224 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-07-21 22:41:02,224 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-21 22:41:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-07-21 22:41:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-07-21 22:41:02,225 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:02,225 INFO L358 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:02,225 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:02,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1893760058, now seen corresponding path program 69 times [2018-07-21 22:41:02,225 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:02,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:02,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:02,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:02,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:03,640 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:03,640 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:03,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:41:03,755 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-07-21 22:41:03,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:03,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:05,505 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:05,505 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 111 [2018-07-21 22:41:05,506 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-21 22:41:05,506 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-21 22:41:05,506 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2811, Invalid=9399, Unknown=0, NotChecked=0, Total=12210 [2018-07-21 22:41:05,507 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 111 states. [2018-07-21 22:41:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:07,452 INFO L93 Difference]: Finished difference Result 371 states and 373 transitions. [2018-07-21 22:41:07,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-21 22:41:07,452 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 219 [2018-07-21 22:41:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:07,453 INFO L225 Difference]: With dead ends: 371 [2018-07-21 22:41:07,453 INFO L226 Difference]: Without dead ends: 222 [2018-07-21 22:41:07,454 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4446 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4957, Invalid=16799, Unknown=0, NotChecked=0, Total=21756 [2018-07-21 22:41:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-07-21 22:41:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-07-21 22:41:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-07-21 22:41:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2018-07-21 22:41:07,502 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2018-07-21 22:41:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:07,502 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2018-07-21 22:41:07,502 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-21 22:41:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2018-07-21 22:41:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-21 22:41:07,503 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:07,503 INFO L358 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:07,503 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:07,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163404, now seen corresponding path program 70 times [2018-07-21 22:41:07,504 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:07,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:07,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:07,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:07,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:08,083 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:08,083 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:08,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:41:08,156 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:41:08,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:08,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:08,254 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:08,255 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-07-21 22:41:08,255 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-21 22:41:08,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-21 22:41:08,255 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-07-21 22:41:08,256 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 42 states. [2018-07-21 22:41:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:08,867 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2018-07-21 22:41:08,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-21 22:41:08,868 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 221 [2018-07-21 22:41:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:08,868 INFO L225 Difference]: With dead ends: 235 [2018-07-21 22:41:08,869 INFO L226 Difference]: Without dead ends: 233 [2018-07-21 22:41:08,869 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2344, Invalid=3976, Unknown=0, NotChecked=0, Total=6320 [2018-07-21 22:41:08,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-07-21 22:41:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2018-07-21 22:41:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-07-21 22:41:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2018-07-21 22:41:08,918 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2018-07-21 22:41:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:08,919 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2018-07-21 22:41:08,919 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-21 22:41:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2018-07-21 22:41:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-07-21 22:41:08,919 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:08,919 INFO L358 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:08,919 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:08,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1386410563, now seen corresponding path program 71 times [2018-07-21 22:41:08,920 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:08,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:08,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:08,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:08,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:10,946 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:10,946 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:10,951 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:41:11,068 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-07-21 22:41:11,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:11,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:12,987 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:12,987 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 114 [2018-07-21 22:41:12,987 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-21 22:41:12,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-21 22:41:12,988 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=9919, Unknown=0, NotChecked=0, Total=12882 [2018-07-21 22:41:12,988 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 114 states. [2018-07-21 22:41:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:15,012 INFO L93 Difference]: Finished difference Result 381 states and 383 transitions. [2018-07-21 22:41:15,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-21 22:41:15,012 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 225 [2018-07-21 22:41:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:15,013 INFO L225 Difference]: With dead ends: 381 [2018-07-21 22:41:15,013 INFO L226 Difference]: Without dead ends: 228 [2018-07-21 22:41:15,014 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4699 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5224, Invalid=17728, Unknown=0, NotChecked=0, Total=22952 [2018-07-21 22:41:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-07-21 22:41:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-07-21 22:41:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-07-21 22:41:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2018-07-21 22:41:15,071 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2018-07-21 22:41:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:15,071 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2018-07-21 22:41:15,071 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-21 22:41:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2018-07-21 22:41:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-07-21 22:41:15,072 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:15,072 INFO L358 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:15,072 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:15,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1166573815, now seen corresponding path program 72 times [2018-07-21 22:41:15,072 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:15,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:15,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:15,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:15,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:15,710 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:15,710 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:15,715 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:41:15,832 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-07-21 22:41:15,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:15,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:15,925 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:15,926 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-07-21 22:41:15,926 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-21 22:41:15,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-21 22:41:15,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-07-21 22:41:15,926 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand 43 states. [2018-07-21 22:41:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:16,568 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-07-21 22:41:16,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-21 22:41:16,603 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 227 [2018-07-21 22:41:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:16,604 INFO L225 Difference]: With dead ends: 241 [2018-07-21 22:41:16,604 INFO L226 Difference]: Without dead ends: 239 [2018-07-21 22:41:16,604 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2464, Invalid=4178, Unknown=0, NotChecked=0, Total=6642 [2018-07-21 22:41:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-07-21 22:41:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2018-07-21 22:41:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-07-21 22:41:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2018-07-21 22:41:16,656 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2018-07-21 22:41:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:16,656 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2018-07-21 22:41:16,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-21 22:41:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2018-07-21 22:41:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-07-21 22:41:16,657 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:16,657 INFO L358 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:16,657 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:16,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1674015296, now seen corresponding path program 73 times [2018-07-21 22:41:16,657 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:16,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:16,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:16,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:16,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:18,387 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:18,387 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:18,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:41:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:18,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:20,405 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:20,405 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 117 [2018-07-21 22:41:20,405 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-21 22:41:20,406 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-21 22:41:20,406 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3119, Invalid=10453, Unknown=0, NotChecked=0, Total=13572 [2018-07-21 22:41:20,406 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 117 states. [2018-07-21 22:41:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:22,548 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-07-21 22:41:22,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-21 22:41:22,549 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 231 [2018-07-21 22:41:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:22,549 INFO L225 Difference]: With dead ends: 391 [2018-07-21 22:41:22,549 INFO L226 Difference]: Without dead ends: 234 [2018-07-21 22:41:22,551 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4959 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5498, Invalid=18682, Unknown=0, NotChecked=0, Total=24180 [2018-07-21 22:41:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-07-21 22:41:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-07-21 22:41:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-07-21 22:41:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2018-07-21 22:41:22,614 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2018-07-21 22:41:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:22,614 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2018-07-21 22:41:22,614 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-21 22:41:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2018-07-21 22:41:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-07-21 22:41:22,615 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:22,615 INFO L358 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:22,615 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1484395002, now seen corresponding path program 74 times [2018-07-21 22:41:22,615 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:22,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:22,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:22,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:41:22,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:23,242 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:23,242 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:23,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:41:23,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:41:23,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:23,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:23,397 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:23,397 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-07-21 22:41:23,397 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-21 22:41:23,397 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-21 22:41:23,397 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-07-21 22:41:23,398 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 44 states. [2018-07-21 22:41:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:24,067 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2018-07-21 22:41:24,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-21 22:41:24,067 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 233 [2018-07-21 22:41:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:24,068 INFO L225 Difference]: With dead ends: 247 [2018-07-21 22:41:24,068 INFO L226 Difference]: Without dead ends: 245 [2018-07-21 22:41:24,069 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2587, Invalid=4385, Unknown=0, NotChecked=0, Total=6972 [2018-07-21 22:41:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-07-21 22:41:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2018-07-21 22:41:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-07-21 22:41:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2018-07-21 22:41:24,124 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2018-07-21 22:41:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:24,125 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2018-07-21 22:41:24,125 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-21 22:41:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2018-07-21 22:41:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-21 22:41:24,125 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:24,125 INFO L358 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:24,126 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1850553917, now seen corresponding path program 75 times [2018-07-21 22:41:24,126 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:24,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:24,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:24,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:24,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:25,823 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:25,823 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:25,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:41:25,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-07-21 22:41:25,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:25,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:27,997 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:27,998 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 120 [2018-07-21 22:41:27,998 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-21 22:41:27,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-21 22:41:27,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-07-21 22:41:27,999 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 120 states. [2018-07-21 22:41:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:29,363 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2018-07-21 22:41:29,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-21 22:41:29,363 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 237 [2018-07-21 22:41:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:29,364 INFO L225 Difference]: With dead ends: 401 [2018-07-21 22:41:29,364 INFO L226 Difference]: Without dead ends: 240 [2018-07-21 22:41:29,365 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5226 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5779, Invalid=19661, Unknown=0, NotChecked=0, Total=25440 [2018-07-21 22:41:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-07-21 22:41:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-07-21 22:41:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-07-21 22:41:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2018-07-21 22:41:29,426 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 237 [2018-07-21 22:41:29,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:29,426 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2018-07-21 22:41:29,426 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-21 22:41:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2018-07-21 22:41:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-07-21 22:41:29,427 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:29,427 INFO L358 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:29,427 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:29,427 INFO L82 PathProgramCache]: Analyzing trace with hash 653866493, now seen corresponding path program 76 times [2018-07-21 22:41:29,427 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:29,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:29,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:29,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:29,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:30,093 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:30,093 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:30,099 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:41:30,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:41:30,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:30,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:30,256 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:30,257 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-07-21 22:41:30,257 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-21 22:41:30,257 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-21 22:41:30,257 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-07-21 22:41:30,257 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 45 states. [2018-07-21 22:41:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:30,973 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-07-21 22:41:30,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-21 22:41:30,973 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 239 [2018-07-21 22:41:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:30,974 INFO L225 Difference]: With dead ends: 253 [2018-07-21 22:41:30,974 INFO L226 Difference]: Without dead ends: 251 [2018-07-21 22:41:30,975 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2713, Invalid=4597, Unknown=0, NotChecked=0, Total=7310 [2018-07-21 22:41:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-07-21 22:41:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2018-07-21 22:41:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-07-21 22:41:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2018-07-21 22:41:31,034 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2018-07-21 22:41:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:31,034 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2018-07-21 22:41:31,034 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-21 22:41:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2018-07-21 22:41:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-07-21 22:41:31,035 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:31,035 INFO L358 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:31,035 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:31,036 INFO L82 PathProgramCache]: Analyzing trace with hash 69874758, now seen corresponding path program 77 times [2018-07-21 22:41:31,036 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:31,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:31,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:31,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:31,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:32,766 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:32,766 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:32,772 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:41:32,900 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-07-21 22:41:32,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:32,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:35,036 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:35,037 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 123 [2018-07-21 22:41:35,037 INFO L450 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-21 22:41:35,037 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-21 22:41:35,038 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3443, Invalid=11563, Unknown=0, NotChecked=0, Total=15006 [2018-07-21 22:41:35,038 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand 123 states. [2018-07-21 22:41:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:36,908 INFO L93 Difference]: Finished difference Result 411 states and 413 transitions. [2018-07-21 22:41:36,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-21 22:41:36,908 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 243 [2018-07-21 22:41:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:36,910 INFO L225 Difference]: With dead ends: 411 [2018-07-21 22:41:36,910 INFO L226 Difference]: Without dead ends: 246 [2018-07-21 22:41:36,911 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5500 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6067, Invalid=20665, Unknown=0, NotChecked=0, Total=26732 [2018-07-21 22:41:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-07-21 22:41:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-07-21 22:41:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-07-21 22:41:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-07-21 22:41:36,969 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 243 [2018-07-21 22:41:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:36,969 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-07-21 22:41:36,970 INFO L472 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-21 22:41:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-07-21 22:41:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-07-21 22:41:36,970 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:36,970 INFO L358 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:36,970 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash 706284800, now seen corresponding path program 78 times [2018-07-21 22:41:36,971 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:36,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:36,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:36,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:36,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:37,674 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:37,674 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:37,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:41:37,825 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-07-21 22:41:37,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:37,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:37,988 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:37,988 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-07-21 22:41:37,988 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-21 22:41:37,989 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-21 22:41:37,989 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-07-21 22:41:37,989 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 46 states. [2018-07-21 22:41:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:38,745 INFO L93 Difference]: Finished difference Result 259 states and 260 transitions. [2018-07-21 22:41:38,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-21 22:41:38,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 245 [2018-07-21 22:41:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:38,747 INFO L225 Difference]: With dead ends: 259 [2018-07-21 22:41:38,747 INFO L226 Difference]: Without dead ends: 257 [2018-07-21 22:41:38,747 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2842, Invalid=4814, Unknown=0, NotChecked=0, Total=7656 [2018-07-21 22:41:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-07-21 22:41:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2018-07-21 22:41:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-07-21 22:41:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-07-21 22:41:38,808 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2018-07-21 22:41:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:38,808 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-07-21 22:41:38,808 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-21 22:41:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-07-21 22:41:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-07-21 22:41:38,809 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:38,809 INFO L358 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:38,809 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:38,809 INFO L82 PathProgramCache]: Analyzing trace with hash 900780489, now seen corresponding path program 79 times [2018-07-21 22:41:38,810 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:38,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:38,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:38,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:38,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:40,689 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:40,689 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:40,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:41:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:40,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:43,008 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:43,008 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 126 [2018-07-21 22:41:43,009 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-21 22:41:43,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-21 22:41:43,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3611, Invalid=12139, Unknown=0, NotChecked=0, Total=15750 [2018-07-21 22:41:43,010 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 126 states. [2018-07-21 22:41:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:44,975 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2018-07-21 22:41:44,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-21 22:41:44,975 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 249 [2018-07-21 22:41:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:44,976 INFO L225 Difference]: With dead ends: 421 [2018-07-21 22:41:44,976 INFO L226 Difference]: Without dead ends: 252 [2018-07-21 22:41:44,976 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5781 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6362, Invalid=21694, Unknown=0, NotChecked=0, Total=28056 [2018-07-21 22:41:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-07-21 22:41:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-07-21 22:41:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-07-21 22:41:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-07-21 22:41:45,037 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2018-07-21 22:41:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:45,037 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-07-21 22:41:45,037 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-21 22:41:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-07-21 22:41:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-07-21 22:41:45,038 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:45,038 INFO L358 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:45,038 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:45,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1650767619, now seen corresponding path program 80 times [2018-07-21 22:41:45,038 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:45,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:45,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:45,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:41:45,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:45,778 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:45,778 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:45,784 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:41:45,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:41:45,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:45,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:45,946 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:45,946 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-07-21 22:41:45,946 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-21 22:41:45,946 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-21 22:41:45,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-07-21 22:41:45,947 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 47 states. [2018-07-21 22:41:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:46,705 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-07-21 22:41:46,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-21 22:41:46,705 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 251 [2018-07-21 22:41:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:46,706 INFO L225 Difference]: With dead ends: 265 [2018-07-21 22:41:46,706 INFO L226 Difference]: Without dead ends: 263 [2018-07-21 22:41:46,707 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2974, Invalid=5036, Unknown=0, NotChecked=0, Total=8010 [2018-07-21 22:41:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-07-21 22:41:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2018-07-21 22:41:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-07-21 22:41:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2018-07-21 22:41:46,770 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 251 [2018-07-21 22:41:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:46,770 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2018-07-21 22:41:46,770 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-21 22:41:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2018-07-21 22:41:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-21 22:41:46,771 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:46,771 INFO L358 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:46,771 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1404976564, now seen corresponding path program 81 times [2018-07-21 22:41:46,771 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:46,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:46,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:46,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:46,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:48,716 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:48,716 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:48,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:41:48,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-07-21 22:41:48,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:48,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:51,221 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:51,221 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 129 [2018-07-21 22:41:51,222 INFO L450 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-07-21 22:41:51,222 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-07-21 22:41:51,222 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3783, Invalid=12729, Unknown=0, NotChecked=0, Total=16512 [2018-07-21 22:41:51,223 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand 129 states. [2018-07-21 22:41:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:53,258 INFO L93 Difference]: Finished difference Result 431 states and 433 transitions. [2018-07-21 22:41:53,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-21 22:41:53,258 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 255 [2018-07-21 22:41:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:53,259 INFO L225 Difference]: With dead ends: 431 [2018-07-21 22:41:53,259 INFO L226 Difference]: Without dead ends: 258 [2018-07-21 22:41:53,260 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6664, Invalid=22748, Unknown=0, NotChecked=0, Total=29412 [2018-07-21 22:41:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-07-21 22:41:53,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-07-21 22:41:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-07-21 22:41:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-07-21 22:41:53,350 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 255 [2018-07-21 22:41:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:53,350 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-07-21 22:41:53,350 INFO L472 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-07-21 22:41:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-07-21 22:41:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-07-21 22:41:53,351 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:53,351 INFO L358 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:53,351 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:53,352 INFO L82 PathProgramCache]: Analyzing trace with hash 903828486, now seen corresponding path program 82 times [2018-07-21 22:41:53,352 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:53,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:53,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:53,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:53,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:54,087 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:54,087 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:54,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:41:54,171 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:41:54,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:54,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:54,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:54,262 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-07-21 22:41:54,263 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-21 22:41:54,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-21 22:41:54,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-07-21 22:41:54,263 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 48 states. [2018-07-21 22:41:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:41:55,039 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2018-07-21 22:41:55,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-21 22:41:55,064 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 257 [2018-07-21 22:41:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:41:55,065 INFO L225 Difference]: With dead ends: 271 [2018-07-21 22:41:55,065 INFO L226 Difference]: Without dead ends: 269 [2018-07-21 22:41:55,066 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3109, Invalid=5263, Unknown=0, NotChecked=0, Total=8372 [2018-07-21 22:41:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-07-21 22:41:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2018-07-21 22:41:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-07-21 22:41:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-07-21 22:41:55,133 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 257 [2018-07-21 22:41:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:41:55,134 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-07-21 22:41:55,134 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-21 22:41:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-07-21 22:41:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-07-21 22:41:55,135 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:41:55,135 INFO L358 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-07-21 22:41:55,135 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:41:55,135 INFO L82 PathProgramCache]: Analyzing trace with hash -682613297, now seen corresponding path program 83 times [2018-07-21 22:41:55,136 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:41:55,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:41:55,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:55,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:41:55,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:41:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:41:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:57,148 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:41:57,148 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:41:57,154 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:41:57,298 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-07-21 22:41:57,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:41:57,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:41:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:41:59,764 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:41:59,764 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 132 [2018-07-21 22:41:59,765 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-21 22:41:59,765 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-21 22:41:59,766 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-07-21 22:41:59,766 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 132 states. [2018-07-21 22:42:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:01,939 INFO L93 Difference]: Finished difference Result 441 states and 443 transitions. [2018-07-21 22:42:01,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-21 22:42:01,939 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 261 [2018-07-21 22:42:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:01,940 INFO L225 Difference]: With dead ends: 441 [2018-07-21 22:42:01,940 INFO L226 Difference]: Without dead ends: 264 [2018-07-21 22:42:01,941 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6364 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6973, Invalid=23827, Unknown=0, NotChecked=0, Total=30800 [2018-07-21 22:42:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-07-21 22:42:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2018-07-21 22:42:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-07-21 22:42:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2018-07-21 22:42:02,015 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 261 [2018-07-21 22:42:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:02,015 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2018-07-21 22:42:02,015 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-21 22:42:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2018-07-21 22:42:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-07-21 22:42:02,016 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:02,016 INFO L358 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:02,016 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash -838597623, now seen corresponding path program 84 times [2018-07-21 22:42:02,017 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:02,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:02,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:02,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:02,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 1892 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:02,796 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:02,797 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:02,802 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:42:02,949 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-07-21 22:42:02,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:42:02,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 1892 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:03,042 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:03,042 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-07-21 22:42:03,043 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-21 22:42:03,043 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-21 22:42:03,043 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-07-21 22:42:03,043 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand 49 states. [2018-07-21 22:42:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:03,892 INFO L93 Difference]: Finished difference Result 277 states and 278 transitions. [2018-07-21 22:42:03,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-21 22:42:03,892 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 263 [2018-07-21 22:42:03,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:03,893 INFO L225 Difference]: With dead ends: 277 [2018-07-21 22:42:03,894 INFO L226 Difference]: Without dead ends: 275 [2018-07-21 22:42:03,894 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3247, Invalid=5495, Unknown=0, NotChecked=0, Total=8742 [2018-07-21 22:42:03,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-07-21 22:42:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2018-07-21 22:42:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-07-21 22:42:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2018-07-21 22:42:03,972 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 263 [2018-07-21 22:42:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:03,972 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2018-07-21 22:42:03,972 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-21 22:42:03,972 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2018-07-21 22:42:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-07-21 22:42:03,973 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:03,973 INFO L358 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:03,973 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1841765458, now seen corresponding path program 85 times [2018-07-21 22:42:03,974 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:03,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:03,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:03,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:03,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5633 backedges. 3741 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:06,094 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:06,094 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:06,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:42:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:06,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5633 backedges. 3741 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:08,753 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:08,753 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 135 [2018-07-21 22:42:08,753 INFO L450 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-07-21 22:42:08,754 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-07-21 22:42:08,754 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4139, Invalid=13951, Unknown=0, NotChecked=0, Total=18090 [2018-07-21 22:42:08,754 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand 135 states. [2018-07-21 22:42:11,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:11,012 INFO L93 Difference]: Finished difference Result 451 states and 453 transitions. [2018-07-21 22:42:11,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-21 22:42:11,012 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 267 [2018-07-21 22:42:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:11,013 INFO L225 Difference]: With dead ends: 451 [2018-07-21 22:42:11,013 INFO L226 Difference]: Without dead ends: 270 [2018-07-21 22:42:11,014 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6666 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7289, Invalid=24931, Unknown=0, NotChecked=0, Total=32220 [2018-07-21 22:42:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-07-21 22:42:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2018-07-21 22:42:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-07-21 22:42:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2018-07-21 22:42:11,096 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 267 [2018-07-21 22:42:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:11,097 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2018-07-21 22:42:11,097 INFO L472 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-07-21 22:42:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2018-07-21 22:42:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-07-21 22:42:11,097 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:11,098 INFO L358 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:11,098 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -171579636, now seen corresponding path program 86 times [2018-07-21 22:42:11,098 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:11,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:11,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:11,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:42:11,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5721 backedges. 1980 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:11,950 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:11,950 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:11,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:42:12,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:42:12,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:42:12,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5721 backedges. 1980 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:12,152 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:12,152 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-07-21 22:42:12,153 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-21 22:42:12,153 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-21 22:42:12,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-07-21 22:42:12,153 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand 50 states. [2018-07-21 22:42:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:12,991 INFO L93 Difference]: Finished difference Result 283 states and 284 transitions. [2018-07-21 22:42:12,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-21 22:42:12,991 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 269 [2018-07-21 22:42:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:12,992 INFO L225 Difference]: With dead ends: 283 [2018-07-21 22:42:12,992 INFO L226 Difference]: Without dead ends: 281 [2018-07-21 22:42:12,993 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3388, Invalid=5732, Unknown=0, NotChecked=0, Total=9120 [2018-07-21 22:42:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-07-21 22:42:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2018-07-21 22:42:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-07-21 22:42:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2018-07-21 22:42:13,065 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 269 [2018-07-21 22:42:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:13,065 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2018-07-21 22:42:13,065 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-21 22:42:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2018-07-21 22:42:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-07-21 22:42:13,066 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:13,066 INFO L358 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:13,066 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:13,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1275708885, now seen corresponding path program 87 times [2018-07-21 22:42:13,066 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:13,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:13,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:13,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:13,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5896 backedges. 3916 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:15,298 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:15,298 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:15,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:42:15,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-07-21 22:42:15,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:42:15,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5896 backedges. 3916 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:18,155 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:18,155 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 138 [2018-07-21 22:42:18,155 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-21 22:42:18,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-21 22:42:18,157 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4323, Invalid=14583, Unknown=0, NotChecked=0, Total=18906 [2018-07-21 22:42:18,157 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 138 states. [2018-07-21 22:42:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:20,549 INFO L93 Difference]: Finished difference Result 461 states and 463 transitions. [2018-07-21 22:42:20,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-21 22:42:20,571 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 273 [2018-07-21 22:42:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:20,572 INFO L225 Difference]: With dead ends: 461 [2018-07-21 22:42:20,572 INFO L226 Difference]: Without dead ends: 276 [2018-07-21 22:42:20,573 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6975 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=7612, Invalid=26060, Unknown=0, NotChecked=0, Total=33672 [2018-07-21 22:42:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-07-21 22:42:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2018-07-21 22:42:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-07-21 22:42:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2018-07-21 22:42:20,647 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 273 [2018-07-21 22:42:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:20,647 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2018-07-21 22:42:20,647 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-21 22:42:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2018-07-21 22:42:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-07-21 22:42:20,648 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:20,648 INFO L358 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:20,648 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2005933327, now seen corresponding path program 88 times [2018-07-21 22:42:20,648 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:20,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:20,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:20,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:20,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 2070 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:21,528 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:21,528 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:21,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:42:21,663 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:42:21,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:42:21,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 2070 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:21,800 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:21,801 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-07-21 22:42:21,801 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-21 22:42:21,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-21 22:42:21,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-07-21 22:42:21,801 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand 51 states. [2018-07-21 22:42:22,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:22,647 INFO L93 Difference]: Finished difference Result 289 states and 290 transitions. [2018-07-21 22:42:22,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-21 22:42:22,648 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 275 [2018-07-21 22:42:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:22,649 INFO L225 Difference]: With dead ends: 289 [2018-07-21 22:42:22,649 INFO L226 Difference]: Without dead ends: 287 [2018-07-21 22:42:22,649 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3532, Invalid=5974, Unknown=0, NotChecked=0, Total=9506 [2018-07-21 22:42:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-07-21 22:42:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 280. [2018-07-21 22:42:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-07-21 22:42:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2018-07-21 22:42:22,724 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 275 [2018-07-21 22:42:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:22,724 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2018-07-21 22:42:22,724 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-21 22:42:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2018-07-21 22:42:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-07-21 22:42:22,725 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:22,725 INFO L358 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:22,725 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash -772586920, now seen corresponding path program 89 times [2018-07-21 22:42:22,726 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:22,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:22,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:22,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:22,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6165 backedges. 4095 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:25,006 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:25,006 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:25,011 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-21 22:42:25,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-07-21 22:42:25,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:42:25,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6165 backedges. 4095 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:27,967 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:27,967 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 141 [2018-07-21 22:42:27,968 INFO L450 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-07-21 22:42:27,968 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-07-21 22:42:27,969 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4511, Invalid=15229, Unknown=0, NotChecked=0, Total=19740 [2018-07-21 22:42:27,969 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 141 states. [2018-07-21 22:42:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:30,390 INFO L93 Difference]: Finished difference Result 471 states and 473 transitions. [2018-07-21 22:42:30,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-21 22:42:30,390 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 279 [2018-07-21 22:42:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:30,391 INFO L225 Difference]: With dead ends: 471 [2018-07-21 22:42:30,391 INFO L226 Difference]: Without dead ends: 282 [2018-07-21 22:42:30,392 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7291 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7942, Invalid=27214, Unknown=0, NotChecked=0, Total=35156 [2018-07-21 22:42:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-07-21 22:42:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2018-07-21 22:42:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-07-21 22:42:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2018-07-21 22:42:30,468 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 279 [2018-07-21 22:42:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:30,468 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2018-07-21 22:42:30,468 INFO L472 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-07-21 22:42:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2018-07-21 22:42:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-07-21 22:42:30,469 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:30,469 INFO L358 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:30,469 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash -79313390, now seen corresponding path program 90 times [2018-07-21 22:42:30,470 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:30,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:30,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:30,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:30,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6257 backedges. 2162 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:31,370 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:31,388 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:31,393 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-07-21 22:42:31,555 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-07-21 22:42:31,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:42:31,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6257 backedges. 2162 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:31,656 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:31,657 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-07-21 22:42:31,657 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-21 22:42:31,657 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-21 22:42:31,657 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-07-21 22:42:31,657 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 52 states. [2018-07-21 22:42:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:32,519 INFO L93 Difference]: Finished difference Result 295 states and 296 transitions. [2018-07-21 22:42:32,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-21 22:42:32,519 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 281 [2018-07-21 22:42:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:32,520 INFO L225 Difference]: With dead ends: 295 [2018-07-21 22:42:32,520 INFO L226 Difference]: Without dead ends: 293 [2018-07-21 22:42:32,521 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3679, Invalid=6221, Unknown=0, NotChecked=0, Total=9900 [2018-07-21 22:42:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-07-21 22:42:32,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 286. [2018-07-21 22:42:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-07-21 22:42:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2018-07-21 22:42:32,598 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 281 [2018-07-21 22:42:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:32,598 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2018-07-21 22:42:32,598 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-21 22:42:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2018-07-21 22:42:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-07-21 22:42:32,599 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:32,599 INFO L358 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:32,599 INFO L414 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:32,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1059671589, now seen corresponding path program 91 times [2018-07-21 22:42:32,599 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:32,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:32,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:32,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:32,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 4278 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:35,046 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:35,046 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:35,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:42:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:35,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 4278 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:38,068 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:38,068 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 144 [2018-07-21 22:42:38,069 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-21 22:42:38,069 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-21 22:42:38,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4703, Invalid=15889, Unknown=0, NotChecked=0, Total=20592 [2018-07-21 22:42:38,070 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 144 states. [2018-07-21 22:42:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:40,684 INFO L93 Difference]: Finished difference Result 481 states and 483 transitions. [2018-07-21 22:42:40,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-21 22:42:40,684 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 285 [2018-07-21 22:42:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:40,685 INFO L225 Difference]: With dead ends: 481 [2018-07-21 22:42:40,685 INFO L226 Difference]: Without dead ends: 288 [2018-07-21 22:42:40,687 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7614 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=8279, Invalid=28393, Unknown=0, NotChecked=0, Total=36672 [2018-07-21 22:42:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-07-21 22:42:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2018-07-21 22:42:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-07-21 22:42:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2018-07-21 22:42:40,767 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 285 [2018-07-21 22:42:40,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:40,767 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2018-07-21 22:42:40,767 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-21 22:42:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2018-07-21 22:42:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-07-21 22:42:40,768 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:40,768 INFO L358 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:40,769 INFO L414 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:40,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1682047509, now seen corresponding path program 92 times [2018-07-21 22:42:40,769 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:40,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:40,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:40,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-21 22:42:40,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 2256 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:41,702 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:41,702 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:41,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-21 22:42:41,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-21 22:42:41,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:42:41,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 2256 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:41,901 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:41,901 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-07-21 22:42:41,901 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-21 22:42:41,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-21 22:42:41,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-07-21 22:42:41,902 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand 53 states. [2018-07-21 22:42:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:42,836 INFO L93 Difference]: Finished difference Result 301 states and 302 transitions. [2018-07-21 22:42:42,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-21 22:42:42,836 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 287 [2018-07-21 22:42:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:42,837 INFO L225 Difference]: With dead ends: 301 [2018-07-21 22:42:42,837 INFO L226 Difference]: Without dead ends: 299 [2018-07-21 22:42:42,838 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3829, Invalid=6473, Unknown=0, NotChecked=0, Total=10302 [2018-07-21 22:42:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-07-21 22:42:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 292. [2018-07-21 22:42:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-07-21 22:42:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2018-07-21 22:42:42,921 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 287 [2018-07-21 22:42:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:42,921 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2018-07-21 22:42:42,921 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-21 22:42:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2018-07-21 22:42:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-07-21 22:42:42,922 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:42,922 INFO L358 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:42,922 INFO L414 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1719716770, now seen corresponding path program 93 times [2018-07-21 22:42:42,922 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:42,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:42,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:42,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:42,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 4465 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:45,403 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:45,403 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:45,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-21 22:42:45,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-07-21 22:42:45,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:42:45,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 4465 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:48,655 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:48,656 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 147 [2018-07-21 22:42:48,656 INFO L450 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-07-21 22:42:48,657 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-07-21 22:42:48,657 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4899, Invalid=16563, Unknown=0, NotChecked=0, Total=21462 [2018-07-21 22:42:48,657 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand 147 states. [2018-07-21 22:42:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:51,099 INFO L93 Difference]: Finished difference Result 491 states and 493 transitions. [2018-07-21 22:42:51,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-21 22:42:51,099 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 291 [2018-07-21 22:42:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:51,100 INFO L225 Difference]: With dead ends: 491 [2018-07-21 22:42:51,100 INFO L226 Difference]: Without dead ends: 294 [2018-07-21 22:42:51,101 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7944 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=8623, Invalid=29597, Unknown=0, NotChecked=0, Total=38220 [2018-07-21 22:42:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-07-21 22:42:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2018-07-21 22:42:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-07-21 22:42:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 295 transitions. [2018-07-21 22:42:51,185 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 295 transitions. Word has length 291 [2018-07-21 22:42:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:51,185 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 295 transitions. [2018-07-21 22:42:51,185 INFO L472 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-07-21 22:42:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 295 transitions. [2018-07-21 22:42:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-07-21 22:42:51,186 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:51,186 INFO L358 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:51,186 INFO L414 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1353191144, now seen corresponding path program 94 times [2018-07-21 22:42:51,186 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:51,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:51,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:51,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:51,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-21 22:42:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 2352 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:52,140 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-21 22:42:52,140 INFO L219 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-21 22:42:52,146 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-21 22:42:52,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-21 22:42:52,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-21 22:42:52,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-21 22:42:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 2352 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-21 22:42:52,343 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-07-21 22:42:52,343 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-07-21 22:42:52,343 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-21 22:42:52,343 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-21 22:42:52,344 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-07-21 22:42:52,344 INFO L87 Difference]: Start difference. First operand 294 states and 295 transitions. Second operand 54 states. [2018-07-21 22:42:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-21 22:42:53,324 INFO L93 Difference]: Finished difference Result 307 states and 308 transitions. [2018-07-21 22:42:53,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-21 22:42:53,325 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 293 [2018-07-21 22:42:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-21 22:42:53,326 INFO L225 Difference]: With dead ends: 307 [2018-07-21 22:42:53,326 INFO L226 Difference]: Without dead ends: 305 [2018-07-21 22:42:53,326 INFO L578 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3982, Invalid=6730, Unknown=0, NotChecked=0, Total=10712 [2018-07-21 22:42:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-07-21 22:42:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 298. [2018-07-21 22:42:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-07-21 22:42:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2018-07-21 22:42:53,414 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 293 [2018-07-21 22:42:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-21 22:42:53,414 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2018-07-21 22:42:53,414 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-21 22:42:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2018-07-21 22:42:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-07-21 22:42:53,415 INFO L350 BasicCegarLoop]: Found error trace [2018-07-21 22:42:53,415 INFO L358 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-07-21 22:42:53,415 INFO L414 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0AssertViolationERROR_FUNCTION]=== [2018-07-21 22:42:53,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2049960417, now seen corresponding path program 95 times [2018-07-21 22:42:53,415 INFO L219 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-07-21 22:42:53,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-07-21 22:42:53,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:53,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-21 22:42:53,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-21 22:42:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-21 22:42:53,857 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-21 22:42:53,861 WARN L202 ceAbstractionStarter]: Timeout [2018-07-21 22:42:53,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:42:53 BoogieIcfgContainer [2018-07-21 22:42:53,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-21 22:42:53,862 INFO L168 Benchmark]: Toolchain (without parser) took 228681.43 ms. Allocated memory was 302.5 MB in the beginning and 1.1 GB in the end (delta: 843.1 MB). Free memory was 249.4 MB in the beginning and 1.0 GB in the end (delta: -767.3 MB). Peak memory consumption was 75.7 MB. Max. memory is 5.3 GB. [2018-07-21 22:42:53,863 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 302.5 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-07-21 22:42:53,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.89 ms. Allocated memory is still 302.5 MB. Free memory was 248.4 MB in the beginning and 239.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-07-21 22:42:53,863 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.65 ms. Allocated memory is still 302.5 MB. Free memory was 239.2 MB in the beginning and 238.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-07-21 22:42:53,864 INFO L168 Benchmark]: Boogie Preprocessor took 23.50 ms. Allocated memory is still 302.5 MB. Free memory was 238.2 MB in the beginning and 237.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-07-21 22:42:53,864 INFO L168 Benchmark]: RCFGBuilder took 531.05 ms. Allocated memory was 302.5 MB in the beginning and 460.8 MB in the end (delta: 158.3 MB). Free memory was 237.2 MB in the beginning and 430.2 MB in the end (delta: -193.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 5.3 GB. [2018-07-21 22:42:53,864 INFO L168 Benchmark]: TraceAbstraction took 227834.93 ms. Allocated memory was 460.8 MB in the beginning and 1.1 GB in the end (delta: 684.7 MB). Free memory was 430.2 MB in the beginning and 1.0 GB in the end (delta: -586.5 MB). Peak memory consumption was 98.2 MB. Max. memory is 5.3 GB. [2018-07-21 22:42:53,866 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 302.5 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 241.89 ms. Allocated memory is still 302.5 MB. Free memory was 248.4 MB in the beginning and 239.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Procedure Inliner took 38.65 ms. Allocated memory is still 302.5 MB. Free memory was 239.2 MB in the beginning and 238.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * Boogie Preprocessor took 23.50 ms. Allocated memory is still 302.5 MB. Free memory was 238.2 MB in the beginning and 237.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 531.05 ms. Allocated memory was 302.5 MB in the beginning and 460.8 MB in the end (delta: 158.3 MB). Free memory was 237.2 MB in the beginning and 430.2 MB in the end (delta: -193.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 227834.93 ms. Allocated memory was 460.8 MB in the beginning and 1.1 GB in the end (delta: 684.7 MB). Free memory was 430.2 MB in the beginning and 1.0 GB in the end (delta: -586.5 MB). Peak memory consumption was 98.2 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 298 with TraceHistMax 49, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 33 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. TIMEOUT Result, 227.7s OverallTime, 98 OverallIterations, 49 TraceHistogramMax, 76.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4218 SDtfs, 9402 SDslu, 67610 SDs, 0 SdLazy, 69067 SolverSat, 5684 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21965 GetRequests, 14529 SyntacticMatches, 0 SemanticMatches, 7436 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174184 ImplicationChecksByTransitivity, 164.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 97 MinimizatonAttempts, 336 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 6.8s SatisfiabilityAnalysisTime, 133.7s InterpolantComputationTime, 28980 NumberOfCodeBlocks, 28980 NumberOfCodeBlocksAsserted, 1350 NumberOfCheckSat, 28789 ConstructedInterpolants, 0 QuantifiedInterpolants, 22278547 SizeOfPredicates, 282 NumberOfNonLiveVariables, 40702 ConjunctsInSsa, 5076 ConjunctsInUnsatCore, 191 InterpolantComputations, 3 PerfectInterpolantSequences, 223534/442366 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/up_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-21_22-42-53-873.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/up_true-unreach-call_true-termination.i_svcomp-Reach-64bit-Automizer_Default.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-21_22-42-53-873.csv Completed graceful shutdown