java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:48:15,295 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:48:15,298 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:48:15,316 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:48:15,316 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:48:15,317 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:48:15,319 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:48:15,322 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:48:15,325 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:48:15,326 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:48:15,328 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:48:15,328 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:48:15,329 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:48:15,338 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:48:15,340 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:48:15,340 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:48:15,341 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:48:15,346 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:48:15,348 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:48:15,349 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:48:15,350 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:48:15,351 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:48:15,353 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:48:15,361 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:48:15,385 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:48:15,385 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:48:15,386 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:48:15,386 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:48:15,387 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:48:15,387 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:48:15,388 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:48:15,388 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:48:15,388 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:48:15,388 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:48:15,388 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:48:15,389 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:48:15,389 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:48:15,389 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:48:15,389 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:48:15,389 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:48:15,389 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:48:15,391 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:48:15,391 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:48:15,391 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:48:15,392 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:48:15,392 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:48:15,392 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:48:15,392 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:48:15,392 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:48:15,392 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:48:15,393 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:48:15,393 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:48:15,460 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:48:15,478 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:48:15,483 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:48:15,484 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:48:15,485 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:48:15,485 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i [2018-10-22 15:48:15,555 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/909a5fd4a/35ee5d7bdd1d41a9967d7adb1d8248d1/FLAG3fde5fc0a [2018-10-22 15:48:16,034 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:48:16,034 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq_true-unreach-call_true-termination.i [2018-10-22 15:48:16,040 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/909a5fd4a/35ee5d7bdd1d41a9967d7adb1d8248d1/FLAG3fde5fc0a [2018-10-22 15:48:16,055 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/909a5fd4a/35ee5d7bdd1d41a9967d7adb1d8248d1 [2018-10-22 15:48:16,065 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:48:16,067 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:48:16,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:48:16,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:48:16,072 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:48:16,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6dee76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16, skipping insertion in model container [2018-10-22 15:48:16,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:48:16,107 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:48:16,285 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:48:16,289 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:48:16,310 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:48:16,327 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:48:16,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16 WrapperNode [2018-10-22 15:48:16,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:48:16,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:48:16,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:48:16,329 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:48:16,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:48:16,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:48:16,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:48:16,372 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:48:16,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... [2018-10-22 15:48:16,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:48:16,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:48:16,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:48:16,404 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:48:16,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:16,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:48:16,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:48:17,004 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:48:17,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:48:17 BoogieIcfgContainer [2018-10-22 15:48:17,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:48:17,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:48:17,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:48:17,010 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:48:17,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:48:16" (1/3) ... [2018-10-22 15:48:17,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110069b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:48:17, skipping insertion in model container [2018-10-22 15:48:17,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:48:16" (2/3) ... [2018-10-22 15:48:17,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110069b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:48:17, skipping insertion in model container [2018-10-22 15:48:17,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:48:17" (3/3) ... [2018-10-22 15:48:17,014 INFO L112 eAbstractionObserver]: Analyzing ICFG seq_true-unreach-call_true-termination.i [2018-10-22 15:48:17,024 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:48:17,032 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:48:17,048 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:48:17,084 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:48:17,085 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:48:17,085 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:48:17,085 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:48:17,085 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:48:17,086 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:48:17,086 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:48:17,086 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:48:17,086 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:48:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-22 15:48:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:48:17,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:17,111 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:17,113 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:17,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:17,120 INFO L82 PathProgramCache]: Analyzing trace with hash 421693396, now seen corresponding path program 1 times [2018-10-22 15:48:17,122 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:17,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:17,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:17,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:17,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:17,242 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:48:17,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:48:17,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:48:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:48:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:48:17,262 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-22 15:48:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:17,279 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2018-10-22 15:48:17,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:48:17,280 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-22 15:48:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:17,291 INFO L225 Difference]: With dead ends: 32 [2018-10-22 15:48:17,291 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:48:17,295 INFO L605 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 [2018-10-22 15:48:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:48:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:48:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:48:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-22 15:48:17,332 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-10-22 15:48:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:17,333 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-22 15:48:17,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:48:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-22 15:48:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 15:48:17,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:17,334 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:17,335 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:17,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:17,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1032572958, now seen corresponding path program 1 times [2018-10-22 15:48:17,335 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:17,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:17,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:17,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:17,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:17,530 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:48:17,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-22 15:48:17,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:48:17,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:48:17,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:48:17,533 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2018-10-22 15:48:17,934 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-22 15:48:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:18,007 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-10-22 15:48:18,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:48:18,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-10-22 15:48:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:18,010 INFO L225 Difference]: With dead ends: 39 [2018-10-22 15:48:18,010 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:48:18,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:48:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:48:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2018-10-22 15:48:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:48:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-10-22 15:48:18,021 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2018-10-22 15:48:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:18,022 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-10-22 15:48:18,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:48:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-10-22 15:48:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:48:18,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:18,023 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:18,023 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:18,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:18,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1225079528, now seen corresponding path program 1 times [2018-10-22 15:48:18,024 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:18,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:18,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:18,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:18,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:18,156 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:48:18,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:48:18,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:48:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:48:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:48:18,160 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2018-10-22 15:48:18,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:18,267 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-10-22 15:48:18,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:48:18,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-22 15:48:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:18,269 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:48:18,269 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:48:18,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:48:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:48:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-22 15:48:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 15:48:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-10-22 15:48:18,275 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2018-10-22 15:48:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:18,276 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-10-22 15:48:18,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:48:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-10-22 15:48:18,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:48:18,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:18,277 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:18,277 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:18,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1940651039, now seen corresponding path program 1 times [2018-10-22 15:48:18,278 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:18,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:18,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:18,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:18,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:18,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:18,537 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:18,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:18,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:18,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:18,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-10-22 15:48:18,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:48:18,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:48:18,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:48:18,879 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 14 states. [2018-10-22 15:48:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:19,502 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-22 15:48:19,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:48:19,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2018-10-22 15:48:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:19,504 INFO L225 Difference]: With dead ends: 51 [2018-10-22 15:48:19,504 INFO L226 Difference]: Without dead ends: 38 [2018-10-22 15:48:19,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:48:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-22 15:48:19,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2018-10-22 15:48:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 15:48:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-10-22 15:48:19,511 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2018-10-22 15:48:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:19,512 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-10-22 15:48:19,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:48:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-10-22 15:48:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:48:19,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:19,513 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:19,514 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:19,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:19,514 INFO L82 PathProgramCache]: Analyzing trace with hash -816692883, now seen corresponding path program 1 times [2018-10-22 15:48:19,514 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:19,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:19,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:19,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:19,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:19,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:19,644 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:19,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:19,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:19,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:19,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-22 15:48:19,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:48:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:48:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:48:19,874 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 13 states. [2018-10-22 15:48:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:20,183 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-10-22 15:48:20,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:48:20,183 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-10-22 15:48:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:20,185 INFO L225 Difference]: With dead ends: 68 [2018-10-22 15:48:20,185 INFO L226 Difference]: Without dead ends: 55 [2018-10-22 15:48:20,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:48:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-22 15:48:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2018-10-22 15:48:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:48:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-10-22 15:48:20,195 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2018-10-22 15:48:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:20,196 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-10-22 15:48:20,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:48:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-10-22 15:48:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:48:20,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:20,199 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:20,200 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:20,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash -728640165, now seen corresponding path program 2 times [2018-10-22 15:48:20,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:20,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:20,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:20,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:20,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:20,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:20,526 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:20,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:20,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:20,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:20,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:20,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:20,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-22 15:48:20,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:48:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:48:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:48:20,605 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2018-10-22 15:48:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:21,138 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-10-22 15:48:21,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:48:21,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-22 15:48:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:21,140 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:48:21,140 INFO L226 Difference]: Without dead ends: 40 [2018-10-22 15:48:21,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:48:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-22 15:48:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2018-10-22 15:48:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-22 15:48:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-10-22 15:48:21,149 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2018-10-22 15:48:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:21,149 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-10-22 15:48:21,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:48:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-10-22 15:48:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 15:48:21,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:21,150 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:21,151 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:21,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash -342672732, now seen corresponding path program 3 times [2018-10-22 15:48:21,151 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:21,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:21,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:21,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:21,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:21,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:21,298 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:21,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:21,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 15:48:21,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:21,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:21,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:21,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-10-22 15:48:21,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:48:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:48:21,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:48:21,628 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 18 states. [2018-10-22 15:48:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:21,887 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2018-10-22 15:48:21,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:48:21,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-10-22 15:48:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:21,888 INFO L225 Difference]: With dead ends: 70 [2018-10-22 15:48:21,888 INFO L226 Difference]: Without dead ends: 53 [2018-10-22 15:48:21,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:48:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-22 15:48:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2018-10-22 15:48:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:48:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-10-22 15:48:21,896 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2018-10-22 15:48:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:21,897 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-10-22 15:48:21,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:48:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-10-22 15:48:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 15:48:21,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:21,898 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:21,898 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:21,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:21,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1108877104, now seen corresponding path program 1 times [2018-10-22 15:48:21,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:21,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:21,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:21,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:21,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:22,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:22,030 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:22,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:22,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:22,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:22,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-10-22 15:48:22,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:48:22,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:48:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:48:22,219 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 17 states. [2018-10-22 15:48:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:22,575 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2018-10-22 15:48:22,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:48:22,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2018-10-22 15:48:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:22,577 INFO L225 Difference]: With dead ends: 88 [2018-10-22 15:48:22,577 INFO L226 Difference]: Without dead ends: 71 [2018-10-22 15:48:22,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:48:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-22 15:48:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 35. [2018-10-22 15:48:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:48:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-10-22 15:48:22,586 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2018-10-22 15:48:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:22,587 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-10-22 15:48:22,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:48:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-10-22 15:48:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 15:48:22,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:22,588 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:22,588 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:22,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash 962901692, now seen corresponding path program 2 times [2018-10-22 15:48:22,589 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:22,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:22,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:22,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:22,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:22,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:22,710 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:22,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:22,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:22,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:22,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:22,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:22,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-22 15:48:22,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:48:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:48:22,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:48:22,924 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 16 states. [2018-10-22 15:48:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:23,220 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2018-10-22 15:48:23,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:48:23,221 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2018-10-22 15:48:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:23,222 INFO L225 Difference]: With dead ends: 109 [2018-10-22 15:48:23,222 INFO L226 Difference]: Without dead ends: 92 [2018-10-22 15:48:23,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:48:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-22 15:48:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 38. [2018-10-22 15:48:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:48:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2018-10-22 15:48:23,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2018-10-22 15:48:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:23,233 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2018-10-22 15:48:23,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:48:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2018-10-22 15:48:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:48:23,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:23,234 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:23,234 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:23,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:23,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2116585630, now seen corresponding path program 4 times [2018-10-22 15:48:23,235 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:23,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:23,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:23,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:23,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:23,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:23,356 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:23,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:23,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:23,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:23,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:23,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:23,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-22 15:48:23,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:48:23,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:48:23,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:48:23,429 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2018-10-22 15:48:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:23,543 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-10-22 15:48:23,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:48:23,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-10-22 15:48:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:23,545 INFO L225 Difference]: With dead ends: 51 [2018-10-22 15:48:23,545 INFO L226 Difference]: Without dead ends: 49 [2018-10-22 15:48:23,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:48:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-22 15:48:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-10-22 15:48:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-22 15:48:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-10-22 15:48:23,556 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2018-10-22 15:48:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:23,557 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-10-22 15:48:23,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:48:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-10-22 15:48:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:48:23,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:23,558 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:23,559 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:23,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:23,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1203202969, now seen corresponding path program 5 times [2018-10-22 15:48:23,559 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:23,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:23,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:23,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:23,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:24,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:24,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:24,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:24,128 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-22 15:48:24,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:24,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:24,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:24,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-10-22 15:48:24,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:48:24,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:48:24,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:48:24,362 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 22 states. [2018-10-22 15:48:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:24,770 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2018-10-22 15:48:24,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:48:24,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-10-22 15:48:24,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:24,771 INFO L225 Difference]: With dead ends: 89 [2018-10-22 15:48:24,771 INFO L226 Difference]: Without dead ends: 68 [2018-10-22 15:48:24,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:48:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-22 15:48:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2018-10-22 15:48:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:48:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-22 15:48:24,783 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-10-22 15:48:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:24,784 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-22 15:48:24,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:48:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-22 15:48:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:48:24,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:24,785 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:24,786 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:24,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:24,786 INFO L82 PathProgramCache]: Analyzing trace with hash 377151475, now seen corresponding path program 2 times [2018-10-22 15:48:24,786 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:24,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:24,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:24,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:24,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:24,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:24,966 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:24,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:25,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:25,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:25,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:25,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:25,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-10-22 15:48:25,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:48:25,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:48:25,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:48:25,511 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 21 states. [2018-10-22 15:48:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:26,132 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2018-10-22 15:48:26,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:48:26,133 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2018-10-22 15:48:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:26,134 INFO L225 Difference]: With dead ends: 113 [2018-10-22 15:48:26,134 INFO L226 Difference]: Without dead ends: 92 [2018-10-22 15:48:26,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:48:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-22 15:48:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 44. [2018-10-22 15:48:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:48:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-22 15:48:26,145 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-10-22 15:48:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:26,145 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-22 15:48:26,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:48:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-22 15:48:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:48:26,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:26,147 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:26,147 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:26,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:26,147 INFO L82 PathProgramCache]: Analyzing trace with hash 530751103, now seen corresponding path program 3 times [2018-10-22 15:48:26,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:26,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:26,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:26,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:26,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:26,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:26,287 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:26,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:26,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:48:26,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:26,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:26,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:26,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-10-22 15:48:26,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:48:26,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:48:26,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:48:26,509 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 20 states. [2018-10-22 15:48:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:26,886 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2018-10-22 15:48:26,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:48:26,886 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2018-10-22 15:48:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:26,887 INFO L225 Difference]: With dead ends: 135 [2018-10-22 15:48:26,888 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:48:26,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:48:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:48:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 44. [2018-10-22 15:48:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:48:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-22 15:48:26,901 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 32 [2018-10-22 15:48:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:26,901 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-22 15:48:26,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:48:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-22 15:48:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 15:48:26,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:26,903 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:26,903 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:26,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash -394227701, now seen corresponding path program 3 times [2018-10-22 15:48:26,904 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:26,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:26,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:26,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:26,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:27,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:27,048 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:27,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:27,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:48:27,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:27,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:27,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:27,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-22 15:48:27,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:48:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:48:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:48:27,224 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 19 states. [2018-10-22 15:48:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:27,712 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2018-10-22 15:48:27,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:48:27,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-10-22 15:48:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:27,713 INFO L225 Difference]: With dead ends: 160 [2018-10-22 15:48:27,713 INFO L226 Difference]: Without dead ends: 139 [2018-10-22 15:48:27,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:48:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-22 15:48:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 47. [2018-10-22 15:48:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:48:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2018-10-22 15:48:27,727 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 32 [2018-10-22 15:48:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:27,727 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2018-10-22 15:48:27,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:48:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2018-10-22 15:48:27,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:48:27,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:27,728 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:27,729 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:27,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:27,729 INFO L82 PathProgramCache]: Analyzing trace with hash 801504993, now seen corresponding path program 6 times [2018-10-22 15:48:27,729 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:27,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:27,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:27,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:27,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:27,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:27,994 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:28,007 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:28,085 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-22 15:48:28,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:28,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:28,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:28,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-22 15:48:28,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:48:28,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:48:28,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:48:28,263 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2018-10-22 15:48:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:28,396 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2018-10-22 15:48:28,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:48:28,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-22 15:48:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:28,397 INFO L225 Difference]: With dead ends: 60 [2018-10-22 15:48:28,397 INFO L226 Difference]: Without dead ends: 58 [2018-10-22 15:48:28,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:48:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-22 15:48:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2018-10-22 15:48:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-22 15:48:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2018-10-22 15:48:28,409 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 34 [2018-10-22 15:48:28,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:28,409 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2018-10-22 15:48:28,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:48:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2018-10-22 15:48:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 15:48:28,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:28,411 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:28,411 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:28,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash -706006742, now seen corresponding path program 7 times [2018-10-22 15:48:28,411 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:28,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:28,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:28,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:28,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:28,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:28,552 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:28,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:28,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:29,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:29,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2018-10-22 15:48:29,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:48:29,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:48:29,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:48:29,053 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 26 states. [2018-10-22 15:48:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:29,312 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2018-10-22 15:48:29,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:48:29,312 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2018-10-22 15:48:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:29,313 INFO L225 Difference]: With dead ends: 108 [2018-10-22 15:48:29,313 INFO L226 Difference]: Without dead ends: 83 [2018-10-22 15:48:29,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:48:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-22 15:48:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2018-10-22 15:48:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:48:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-22 15:48:29,326 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-22 15:48:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:29,326 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-22 15:48:29,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:48:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-22 15:48:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 15:48:29,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:29,327 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:29,328 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:29,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:29,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1478384714, now seen corresponding path program 4 times [2018-10-22 15:48:29,328 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:29,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:29,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:29,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:29,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:29,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:29,488 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:29,495 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:29,510 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:29,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:29,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:29,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:29,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2018-10-22 15:48:29,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:48:29,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:48:29,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:48:29,742 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 25 states. [2018-10-22 15:48:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:30,076 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2018-10-22 15:48:30,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:48:30,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-10-22 15:48:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:30,077 INFO L225 Difference]: With dead ends: 138 [2018-10-22 15:48:30,077 INFO L226 Difference]: Without dead ends: 113 [2018-10-22 15:48:30,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:48:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-22 15:48:30,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 53. [2018-10-22 15:48:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:48:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-22 15:48:30,092 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-22 15:48:30,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:30,092 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-22 15:48:30,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:48:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-22 15:48:30,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 15:48:30,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:30,093 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:30,094 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:30,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:30,094 INFO L82 PathProgramCache]: Analyzing trace with hash -978630334, now seen corresponding path program 5 times [2018-10-22 15:48:30,094 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:30,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:30,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:30,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:30,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:30,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:30,560 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:30,567 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:30,583 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-22 15:48:30,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:30,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:30,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:30,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2018-10-22 15:48:30,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:48:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:48:30,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:48:30,787 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 24 states. [2018-10-22 15:48:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:31,571 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2018-10-22 15:48:31,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:48:31,571 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 38 [2018-10-22 15:48:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:31,572 INFO L225 Difference]: With dead ends: 166 [2018-10-22 15:48:31,572 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:48:31,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=364, Invalid=1358, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:48:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:48:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 53. [2018-10-22 15:48:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:48:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-22 15:48:31,591 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-22 15:48:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:31,592 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-22 15:48:31,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:48:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-22 15:48:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 15:48:31,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:31,593 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:31,593 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:31,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:31,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1618534862, now seen corresponding path program 6 times [2018-10-22 15:48:31,593 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:31,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:31,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:31,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:31,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:31,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:31,772 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:31,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:31,799 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-22 15:48:31,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:31,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:32,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:32,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2018-10-22 15:48:32,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:48:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:48:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:48:32,154 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 23 states. [2018-10-22 15:48:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:32,628 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2018-10-22 15:48:32,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:48:32,628 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2018-10-22 15:48:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:32,629 INFO L225 Difference]: With dead ends: 192 [2018-10-22 15:48:32,629 INFO L226 Difference]: Without dead ends: 167 [2018-10-22 15:48:32,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:48:32,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-22 15:48:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 53. [2018-10-22 15:48:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:48:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-10-22 15:48:32,644 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2018-10-22 15:48:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:32,644 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-10-22 15:48:32,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:48:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-10-22 15:48:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 15:48:32,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:32,645 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:32,645 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:32,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1096077990, now seen corresponding path program 4 times [2018-10-22 15:48:32,645 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:32,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:32,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:32,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:32,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:32,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:32,819 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:32,827 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:32,842 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:32,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:32,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:33,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:33,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-10-22 15:48:33,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:48:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:48:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:48:33,084 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 22 states. [2018-10-22 15:48:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:33,481 INFO L93 Difference]: Finished difference Result 221 states and 234 transitions. [2018-10-22 15:48:33,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:48:33,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2018-10-22 15:48:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:33,483 INFO L225 Difference]: With dead ends: 221 [2018-10-22 15:48:33,483 INFO L226 Difference]: Without dead ends: 196 [2018-10-22 15:48:33,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:48:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-22 15:48:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 56. [2018-10-22 15:48:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:48:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2018-10-22 15:48:33,504 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 38 [2018-10-22 15:48:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:33,504 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2018-10-22 15:48:33,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:48:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2018-10-22 15:48:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:48:33,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:33,505 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:33,505 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:33,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2048305116, now seen corresponding path program 8 times [2018-10-22 15:48:33,505 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:33,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:33,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:33,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:33,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:33,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:33,625 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:33,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:33,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:33,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:33,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:33,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:33,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-22 15:48:33,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:48:33,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:48:33,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:48:33,736 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 11 states. [2018-10-22 15:48:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:33,889 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2018-10-22 15:48:33,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:48:33,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-10-22 15:48:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:33,890 INFO L225 Difference]: With dead ends: 69 [2018-10-22 15:48:33,890 INFO L226 Difference]: Without dead ends: 67 [2018-10-22 15:48:33,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:48:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-22 15:48:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2018-10-22 15:48:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-22 15:48:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2018-10-22 15:48:33,907 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 40 [2018-10-22 15:48:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:33,907 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2018-10-22 15:48:33,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:48:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2018-10-22 15:48:33,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-22 15:48:33,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:33,908 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:33,908 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:33,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:33,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1282027757, now seen corresponding path program 9 times [2018-10-22 15:48:33,909 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:33,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:33,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:33,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:33,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:34,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:34,271 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:34,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:34,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:48:34,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:34,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:34,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:34,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2018-10-22 15:48:34,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:48:34,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:48:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:48:34,559 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 30 states. [2018-10-22 15:48:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:34,938 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2018-10-22 15:48:34,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:48:34,938 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 44 [2018-10-22 15:48:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:34,939 INFO L225 Difference]: With dead ends: 127 [2018-10-22 15:48:34,939 INFO L226 Difference]: Without dead ends: 98 [2018-10-22 15:48:34,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:48:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-22 15:48:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2018-10-22 15:48:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:48:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-22 15:48:34,959 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-22 15:48:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:34,959 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-22 15:48:34,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:48:34,960 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-22 15:48:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-22 15:48:34,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:34,960 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:34,960 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:34,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1037333895, now seen corresponding path program 7 times [2018-10-22 15:48:34,961 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:34,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:34,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:34,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:34,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:35,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:35,766 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:35,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:35,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:36,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:36,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2018-10-22 15:48:36,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:48:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:48:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:48:36,001 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 29 states. [2018-10-22 15:48:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:36,490 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2018-10-22 15:48:36,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:48:36,490 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2018-10-22 15:48:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:36,491 INFO L225 Difference]: With dead ends: 163 [2018-10-22 15:48:36,491 INFO L226 Difference]: Without dead ends: 134 [2018-10-22 15:48:36,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=1791, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:48:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-22 15:48:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 62. [2018-10-22 15:48:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:48:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-22 15:48:36,520 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-22 15:48:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:36,521 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-22 15:48:36,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:48:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-22 15:48:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-22 15:48:36,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:36,521 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:36,522 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:36,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:36,522 INFO L82 PathProgramCache]: Analyzing trace with hash -145893627, now seen corresponding path program 8 times [2018-10-22 15:48:36,522 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:36,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:36,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:36,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:36,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:36,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:36,732 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:36,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:36,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:36,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:36,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:37,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:37,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2018-10-22 15:48:37,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:48:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:48:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:48:37,319 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 28 states. [2018-10-22 15:48:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:37,841 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2018-10-22 15:48:37,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:48:37,841 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 44 [2018-10-22 15:48:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:37,842 INFO L225 Difference]: With dead ends: 197 [2018-10-22 15:48:37,842 INFO L226 Difference]: Without dead ends: 168 [2018-10-22 15:48:37,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:48:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-22 15:48:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 62. [2018-10-22 15:48:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:48:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-22 15:48:37,868 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-22 15:48:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:37,868 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-22 15:48:37,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:48:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-22 15:48:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-22 15:48:37,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:37,869 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:37,869 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:37,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash 628217489, now seen corresponding path program 9 times [2018-10-22 15:48:37,869 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:37,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:37,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:37,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:37,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:38,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:38,054 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:48:38,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:38,083 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:48:38,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:38,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:38,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:38,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2018-10-22 15:48:38,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:48:38,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:48:38,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:48:38,341 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 27 states. [2018-10-22 15:48:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:39,431 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2018-10-22 15:48:39,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:48:39,431 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2018-10-22 15:48:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:39,432 INFO L225 Difference]: With dead ends: 229 [2018-10-22 15:48:39,432 INFO L226 Difference]: Without dead ends: 200 [2018-10-22 15:48:39,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:48:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-22 15:48:39,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 62. [2018-10-22 15:48:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:48:39,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-22 15:48:39,464 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-22 15:48:39,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:39,464 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-22 15:48:39,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:48:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-22 15:48:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-22 15:48:39,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:39,464 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:39,465 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:39,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:39,465 INFO L82 PathProgramCache]: Analyzing trace with hash -144160483, now seen corresponding path program 10 times [2018-10-22 15:48:39,465 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:39,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:39,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:39,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:39,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:39,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:39,738 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:39,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:39,769 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:39,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:39,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:39,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:39,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-10-22 15:48:39,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:48:39,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:48:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:48:39,985 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 26 states. [2018-10-22 15:48:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:40,528 INFO L93 Difference]: Finished difference Result 259 states and 272 transitions. [2018-10-22 15:48:40,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:48:40,528 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2018-10-22 15:48:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:40,529 INFO L225 Difference]: With dead ends: 259 [2018-10-22 15:48:40,529 INFO L226 Difference]: Without dead ends: 230 [2018-10-22 15:48:40,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1791, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:48:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-10-22 15:48:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 62. [2018-10-22 15:48:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:48:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2018-10-22 15:48:40,559 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 44 [2018-10-22 15:48:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:40,559 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2018-10-22 15:48:40,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:48:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2018-10-22 15:48:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-22 15:48:40,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:40,560 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:40,560 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:40,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash 355593897, now seen corresponding path program 5 times [2018-10-22 15:48:40,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:40,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:40,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:40,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:40,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:40,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:40,741 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:40,749 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:40,768 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:48:40,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:40,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:41,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:41,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-22 15:48:41,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:48:41,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:48:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:48:41,368 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 25 states. [2018-10-22 15:48:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:41,892 INFO L93 Difference]: Finished difference Result 292 states and 307 transitions. [2018-10-22 15:48:41,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:48:41,892 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2018-10-22 15:48:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:41,894 INFO L225 Difference]: With dead ends: 292 [2018-10-22 15:48:41,894 INFO L226 Difference]: Without dead ends: 263 [2018-10-22 15:48:41,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:48:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-22 15:48:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 65. [2018-10-22 15:48:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 15:48:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2018-10-22 15:48:41,926 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 44 [2018-10-22 15:48:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:41,926 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2018-10-22 15:48:41,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:48:41,927 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2018-10-22 15:48:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:48:41,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:41,927 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:41,927 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:41,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1535751271, now seen corresponding path program 10 times [2018-10-22 15:48:41,928 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:41,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:41,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:41,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:41,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:42,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:42,103 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:42,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:42,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:42,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:42,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:42,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:42,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-22 15:48:42,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:48:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:48:42,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:48:42,185 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 12 states. [2018-10-22 15:48:42,606 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-22 15:48:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:43,647 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2018-10-22 15:48:43,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:48:43,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2018-10-22 15:48:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:43,649 INFO L225 Difference]: With dead ends: 78 [2018-10-22 15:48:43,649 INFO L226 Difference]: Without dead ends: 76 [2018-10-22 15:48:43,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:48:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-22 15:48:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2018-10-22 15:48:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-22 15:48:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-10-22 15:48:43,677 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 46 [2018-10-22 15:48:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:43,678 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-10-22 15:48:43,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:48:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-10-22 15:48:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:48:43,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:43,678 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:43,678 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:43,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1714205616, now seen corresponding path program 11 times [2018-10-22 15:48:43,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:43,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:43,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:43,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:43,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:44,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:44,189 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:44,203 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:44,227 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-22 15:48:44,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:44,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:44,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:44,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2018-10-22 15:48:44,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:48:44,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:48:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:48:44,639 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 34 states. [2018-10-22 15:48:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:45,053 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2018-10-22 15:48:45,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:48:45,053 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 50 [2018-10-22 15:48:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:45,054 INFO L225 Difference]: With dead ends: 146 [2018-10-22 15:48:45,054 INFO L226 Difference]: Without dead ends: 113 [2018-10-22 15:48:45,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:48:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-22 15:48:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2018-10-22 15:48:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:48:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-22 15:48:45,088 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-22 15:48:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:45,088 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-22 15:48:45,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:48:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-22 15:48:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:48:45,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:45,089 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:45,089 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:45,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1079004100, now seen corresponding path program 11 times [2018-10-22 15:48:45,089 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:45,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:45,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:45,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:45,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:45,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:45,304 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:45,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:45,347 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-22 15:48:45,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:45,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:45,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:45,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2018-10-22 15:48:45,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:48:45,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:48:45,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:48:45,622 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 33 states. [2018-10-22 15:48:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:46,199 INFO L93 Difference]: Finished difference Result 188 states and 199 transitions. [2018-10-22 15:48:46,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:48:46,200 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 50 [2018-10-22 15:48:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:46,201 INFO L225 Difference]: With dead ends: 188 [2018-10-22 15:48:46,201 INFO L226 Difference]: Without dead ends: 155 [2018-10-22 15:48:46,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=2375, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:48:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-22 15:48:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 71. [2018-10-22 15:48:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:48:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-22 15:48:46,244 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-22 15:48:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:46,245 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-22 15:48:46,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:48:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-22 15:48:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:48:46,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:46,246 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:46,246 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:46,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1523673032, now seen corresponding path program 12 times [2018-10-22 15:48:46,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:46,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:46,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:46,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:46,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:46,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:46,612 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:46,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:46,643 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:48:46,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:46,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:46,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:46,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2018-10-22 15:48:46,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:48:46,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:48:46,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:48:46,959 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 32 states. [2018-10-22 15:48:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:47,641 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2018-10-22 15:48:47,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:48:47,641 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2018-10-22 15:48:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:47,642 INFO L225 Difference]: With dead ends: 228 [2018-10-22 15:48:47,642 INFO L226 Difference]: Without dead ends: 195 [2018-10-22 15:48:47,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:48:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-22 15:48:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 71. [2018-10-22 15:48:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:48:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-22 15:48:47,696 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-22 15:48:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:47,696 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-22 15:48:47,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:48:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-22 15:48:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:48:47,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:47,697 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:47,697 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:47,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1705152084, now seen corresponding path program 13 times [2018-10-22 15:48:47,698 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:47,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:47,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:47,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:47,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 78 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:47,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:47,931 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:47,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:47,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 78 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:48,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:48,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2018-10-22 15:48:48,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:48:48,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:48:48,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:48:48,187 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 31 states. [2018-10-22 15:48:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:48,997 INFO L93 Difference]: Finished difference Result 266 states and 279 transitions. [2018-10-22 15:48:48,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:48:48,997 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2018-10-22 15:48:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:48,999 INFO L225 Difference]: With dead ends: 266 [2018-10-22 15:48:48,999 INFO L226 Difference]: Without dead ends: 233 [2018-10-22 15:48:49,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=2754, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:48:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-22 15:48:49,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 71. [2018-10-22 15:48:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:48:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-22 15:48:49,043 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-22 15:48:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:49,044 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-22 15:48:49,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:48:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-22 15:48:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:48:49,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:49,044 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:49,044 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:49,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash -614209568, now seen corresponding path program 14 times [2018-10-22 15:48:49,045 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:49,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:49,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:49,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:49,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:49,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:49,983 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:49,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:50,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:50,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:50,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:50,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:50,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2018-10-22 15:48:50,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:48:50,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:48:50,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:48:50,249 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 30 states. [2018-10-22 15:48:51,355 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-22 15:48:51,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:51,526 INFO L93 Difference]: Finished difference Result 302 states and 316 transitions. [2018-10-22 15:48:51,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:48:51,526 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 50 [2018-10-22 15:48:51,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:51,528 INFO L225 Difference]: With dead ends: 302 [2018-10-22 15:48:51,528 INFO L226 Difference]: Without dead ends: 269 [2018-10-22 15:48:51,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:48:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-22 15:48:51,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 71. [2018-10-22 15:48:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:48:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-22 15:48:51,577 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-22 15:48:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:51,577 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-22 15:48:51,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:48:51,578 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-22 15:48:51,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:48:51,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:51,578 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:51,578 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:51,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:51,579 INFO L82 PathProgramCache]: Analyzing trace with hash 277230700, now seen corresponding path program 15 times [2018-10-22 15:48:51,579 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:51,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:51,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:51,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:51,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:52,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:52,008 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:52,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:52,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-22 15:48:52,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:52,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:52,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:52,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2018-10-22 15:48:52,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:48:52,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:48:52,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:48:52,284 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 29 states. [2018-10-22 15:48:53,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:53,148 INFO L93 Difference]: Finished difference Result 336 states and 351 transitions. [2018-10-22 15:48:53,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:48:53,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 50 [2018-10-22 15:48:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:53,150 INFO L225 Difference]: With dead ends: 336 [2018-10-22 15:48:53,150 INFO L226 Difference]: Without dead ends: 303 [2018-10-22 15:48:53,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=2375, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:48:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-22 15:48:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 71. [2018-10-22 15:48:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:48:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-10-22 15:48:53,195 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 50 [2018-10-22 15:48:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:53,195 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-10-22 15:48:53,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:48:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-10-22 15:48:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-22 15:48:53,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:53,196 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:53,196 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:53,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1051341816, now seen corresponding path program 6 times [2018-10-22 15:48:53,196 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:53,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:53,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:53,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:53,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:53,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:53,433 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:53,441 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:53,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:48:53,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:53,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:53,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:53,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-22 15:48:53,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:48:53,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:48:53,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:48:53,679 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 28 states. [2018-10-22 15:48:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:54,406 INFO L93 Difference]: Finished difference Result 373 states and 390 transitions. [2018-10-22 15:48:54,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:48:54,406 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2018-10-22 15:48:54,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:54,407 INFO L225 Difference]: With dead ends: 373 [2018-10-22 15:48:54,407 INFO L226 Difference]: Without dead ends: 340 [2018-10-22 15:48:54,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:48:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-10-22 15:48:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 74. [2018-10-22 15:48:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-22 15:48:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2018-10-22 15:48:54,460 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 50 [2018-10-22 15:48:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:54,461 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2018-10-22 15:48:54,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:48:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2018-10-22 15:48:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:48:54,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:54,461 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:54,461 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:54,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:54,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1746285482, now seen corresponding path program 12 times [2018-10-22 15:48:54,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:54,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:54,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:54,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:54,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:54,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:54,635 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:54,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:54,663 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 15:48:54,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:54,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:54,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:54,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-22 15:48:54,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:48:54,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:48:54,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:48:54,786 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 13 states. [2018-10-22 15:48:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:55,016 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2018-10-22 15:48:55,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:48:55,016 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-10-22 15:48:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:55,017 INFO L225 Difference]: With dead ends: 87 [2018-10-22 15:48:55,017 INFO L226 Difference]: Without dead ends: 85 [2018-10-22 15:48:55,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:48:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-22 15:48:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2018-10-22 15:48:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-22 15:48:55,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2018-10-22 15:48:55,059 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 52 [2018-10-22 15:48:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:55,059 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2018-10-22 15:48:55,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:48:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2018-10-22 15:48:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:48:55,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:55,060 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:55,060 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:55,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1309792627, now seen corresponding path program 13 times [2018-10-22 15:48:55,060 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:55,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:55,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:55,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:55,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:55,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:55,557 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:55,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:55,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:55,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:55,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2018-10-22 15:48:55,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:48:55,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:48:55,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:48:55,978 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 38 states. [2018-10-22 15:48:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:56,697 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2018-10-22 15:48:56,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:48:56,697 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2018-10-22 15:48:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:56,698 INFO L225 Difference]: With dead ends: 165 [2018-10-22 15:48:56,698 INFO L226 Difference]: Without dead ends: 128 [2018-10-22 15:48:56,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=633, Invalid=2447, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:48:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-22 15:48:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 80. [2018-10-22 15:48:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:48:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-22 15:48:56,750 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-22 15:48:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:56,750 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-22 15:48:56,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:48:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-22 15:48:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:48:56,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:56,751 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:56,752 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:56,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:56,752 INFO L82 PathProgramCache]: Analyzing trace with hash 658325759, now seen corresponding path program 16 times [2018-10-22 15:48:56,752 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:56,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:56,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:56,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:56,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:56,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:56,980 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:56,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:57,009 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:57,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:57,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:57,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:57,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2018-10-22 15:48:57,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:48:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:48:57,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1065, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:48:57,401 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 37 states. [2018-10-22 15:48:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:58,453 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2018-10-22 15:48:58,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:48:58,453 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 56 [2018-10-22 15:48:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:58,454 INFO L225 Difference]: With dead ends: 213 [2018-10-22 15:48:58,454 INFO L226 Difference]: Without dead ends: 176 [2018-10-22 15:48:58,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=3041, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:48:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-22 15:48:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 80. [2018-10-22 15:48:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:48:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-22 15:48:58,516 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-22 15:48:58,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:58,516 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-22 15:48:58,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:48:58,516 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-22 15:48:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:48:58,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:58,517 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:58,517 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:58,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash 250944395, now seen corresponding path program 17 times [2018-10-22 15:48:58,517 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:58,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:58,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:58,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:58,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:58,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:58,783 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:48:58,791 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:58,818 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-22 15:48:58,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:58,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:48:59,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:59,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2018-10-22 15:48:59,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:48:59,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:48:59,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:48:59,153 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 36 states. [2018-10-22 15:49:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:00,203 INFO L93 Difference]: Finished difference Result 259 states and 272 transitions. [2018-10-22 15:49:00,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:49:00,203 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 56 [2018-10-22 15:49:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:00,204 INFO L225 Difference]: With dead ends: 259 [2018-10-22 15:49:00,204 INFO L226 Difference]: Without dead ends: 222 [2018-10-22 15:49:00,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=823, Invalid=3467, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:49:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-22 15:49:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 80. [2018-10-22 15:49:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:49:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-22 15:49:00,269 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-22 15:49:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:00,269 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-22 15:49:00,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:49:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-22 15:49:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:49:00,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:00,269 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:00,270 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:00,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash 330967319, now seen corresponding path program 18 times [2018-10-22 15:49:00,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:00,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:00,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:00,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:00,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:00,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:00,464 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:00,471 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:00,500 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 15:49:00,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:00,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:00,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:00,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 35 [2018-10-22 15:49:00,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:49:00,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:49:00,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:49:00,791 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 35 states. [2018-10-22 15:49:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:01,783 INFO L93 Difference]: Finished difference Result 303 states and 317 transitions. [2018-10-22 15:49:01,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:49:01,783 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 56 [2018-10-22 15:49:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:01,784 INFO L225 Difference]: With dead ends: 303 [2018-10-22 15:49:01,784 INFO L226 Difference]: Without dead ends: 266 [2018-10-22 15:49:01,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=867, Invalid=3689, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:49:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-22 15:49:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 80. [2018-10-22 15:49:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:49:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-22 15:49:01,847 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-22 15:49:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:01,847 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-22 15:49:01,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:49:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-22 15:49:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:49:01,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:01,848 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:01,848 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:01,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:01,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1832724899, now seen corresponding path program 19 times [2018-10-22 15:49:01,849 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:01,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:01,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:01,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:01,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:02,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:02,056 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:02,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:02,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:02,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:02,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2018-10-22 15:49:02,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:49:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:49:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:49:02,360 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 34 states. [2018-10-22 15:49:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:03,421 INFO L93 Difference]: Finished difference Result 345 states and 360 transitions. [2018-10-22 15:49:03,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:49:03,421 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2018-10-22 15:49:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:03,422 INFO L225 Difference]: With dead ends: 345 [2018-10-22 15:49:03,423 INFO L226 Difference]: Without dead ends: 308 [2018-10-22 15:49:03,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=867, Invalid=3689, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:49:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-10-22 15:49:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 80. [2018-10-22 15:49:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:49:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-22 15:49:03,488 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-22 15:49:03,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:03,489 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-22 15:49:03,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:49:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-22 15:49:03,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:49:03,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:03,490 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:03,490 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:03,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash 140434735, now seen corresponding path program 20 times [2018-10-22 15:49:03,491 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:03,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:03,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:03,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:03,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:04,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:04,215 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:04,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:04,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:04,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:04,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:05,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:05,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2018-10-22 15:49:05,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:49:05,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:49:05,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:49:05,141 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 33 states. [2018-10-22 15:49:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:06,215 INFO L93 Difference]: Finished difference Result 385 states and 401 transitions. [2018-10-22 15:49:06,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:49:06,215 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 56 [2018-10-22 15:49:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:06,216 INFO L225 Difference]: With dead ends: 385 [2018-10-22 15:49:06,216 INFO L226 Difference]: Without dead ends: 348 [2018-10-22 15:49:06,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=823, Invalid=3467, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:49:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-10-22 15:49:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 80. [2018-10-22 15:49:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:49:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-22 15:49:06,287 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-22 15:49:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:06,288 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-22 15:49:06,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:49:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-22 15:49:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:49:06,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:06,288 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:06,288 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:06,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:06,289 INFO L82 PathProgramCache]: Analyzing trace with hash 321913787, now seen corresponding path program 21 times [2018-10-22 15:49:06,289 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:06,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:06,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:06,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:06,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:06,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:06,495 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:06,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:06,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-22 15:49:06,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:06,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:06,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:06,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2018-10-22 15:49:06,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:49:06,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:49:06,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:49:06,941 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 32 states. [2018-10-22 15:49:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:08,027 INFO L93 Difference]: Finished difference Result 423 states and 440 transitions. [2018-10-22 15:49:08,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:49:08,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 56 [2018-10-22 15:49:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:08,029 INFO L225 Difference]: With dead ends: 423 [2018-10-22 15:49:08,029 INFO L226 Difference]: Without dead ends: 386 [2018-10-22 15:49:08,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=3041, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:49:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-22 15:49:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 80. [2018-10-22 15:49:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:49:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-10-22 15:49:08,114 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 56 [2018-10-22 15:49:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:08,114 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-10-22 15:49:08,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:49:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-10-22 15:49:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:49:08,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:08,115 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:08,115 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:08,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1997447865, now seen corresponding path program 7 times [2018-10-22 15:49:08,115 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:08,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:08,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:08,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:08,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:08,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:08,326 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:08,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:08,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:08,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:08,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-10-22 15:49:08,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:49:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:49:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:49:08,623 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 31 states. [2018-10-22 15:49:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:09,770 INFO L93 Difference]: Finished difference Result 464 states and 483 transitions. [2018-10-22 15:49:09,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:49:09,770 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2018-10-22 15:49:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:09,771 INFO L225 Difference]: With dead ends: 464 [2018-10-22 15:49:09,771 INFO L226 Difference]: Without dead ends: 427 [2018-10-22 15:49:09,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=633, Invalid=2447, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:49:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-22 15:49:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 83. [2018-10-22 15:49:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:49:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2018-10-22 15:49:09,869 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 56 [2018-10-22 15:49:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:09,869 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2018-10-22 15:49:09,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:49:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2018-10-22 15:49:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:49:09,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:09,870 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:09,870 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:09,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:09,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1568011757, now seen corresponding path program 14 times [2018-10-22 15:49:09,871 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:09,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:09,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:09,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:09,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:10,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:10,415 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:10,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:10,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:10,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:10,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:10,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:10,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-22 15:49:10,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:49:10,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:49:10,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:49:10,497 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 14 states. [2018-10-22 15:49:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:10,776 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2018-10-22 15:49:10,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:49:10,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-10-22 15:49:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:10,778 INFO L225 Difference]: With dead ends: 96 [2018-10-22 15:49:10,778 INFO L226 Difference]: Without dead ends: 94 [2018-10-22 15:49:10,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:49:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-22 15:49:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2018-10-22 15:49:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-22 15:49:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-10-22 15:49:10,850 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 58 [2018-10-22 15:49:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:10,850 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-10-22 15:49:10,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:49:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-10-22 15:49:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:49:10,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:10,850 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:10,851 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:10,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash 762364470, now seen corresponding path program 15 times [2018-10-22 15:49:10,851 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:10,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:10,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:10,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:10,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:11,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:11,698 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:11,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:11,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-22 15:49:11,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:11,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:12,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:12,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2018-10-22 15:49:12,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:49:12,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:49:12,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:49:12,126 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 42 states. [2018-10-22 15:49:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:12,888 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2018-10-22 15:49:12,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:49:12,888 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 62 [2018-10-22 15:49:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:12,889 INFO L225 Difference]: With dead ends: 184 [2018-10-22 15:49:12,889 INFO L226 Difference]: Without dead ends: 143 [2018-10-22 15:49:12,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=763, Invalid=3019, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:49:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-22 15:49:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2018-10-22 15:49:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:49:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-22 15:49:13,021 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-22 15:49:13,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:13,021 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-22 15:49:13,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:49:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-22 15:49:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:49:13,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:13,022 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:13,022 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:13,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:13,023 INFO L82 PathProgramCache]: Analyzing trace with hash -904179518, now seen corresponding path program 22 times [2018-10-22 15:49:13,023 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:13,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:13,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:13,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:13,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:14,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:14,742 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:14,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:14,774 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:14,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:14,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:15,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:15,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2018-10-22 15:49:15,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:49:15,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:49:15,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:49:15,393 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 41 states. [2018-10-22 15:49:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:16,417 INFO L93 Difference]: Finished difference Result 238 states and 251 transitions. [2018-10-22 15:49:16,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:49:16,417 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 62 [2018-10-22 15:49:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:16,418 INFO L225 Difference]: With dead ends: 238 [2018-10-22 15:49:16,418 INFO L226 Difference]: Without dead ends: 197 [2018-10-22 15:49:16,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:49:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-22 15:49:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 89. [2018-10-22 15:49:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:49:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-22 15:49:16,557 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-22 15:49:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:16,557 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-22 15:49:16,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:49:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-22 15:49:16,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:49:16,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:16,558 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:16,558 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:16,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:16,558 INFO L82 PathProgramCache]: Analyzing trace with hash -923790770, now seen corresponding path program 23 times [2018-10-22 15:49:16,559 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:16,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:16,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:16,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:16,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:17,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:17,098 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:17,105 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:17,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-22 15:49:17,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:17,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:17,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:17,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 40 [2018-10-22 15:49:17,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:49:17,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:49:17,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:49:17,486 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 40 states. [2018-10-22 15:49:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:18,709 INFO L93 Difference]: Finished difference Result 290 states and 304 transitions. [2018-10-22 15:49:18,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:49:18,709 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 62 [2018-10-22 15:49:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:18,711 INFO L225 Difference]: With dead ends: 290 [2018-10-22 15:49:18,711 INFO L226 Difference]: Without dead ends: 249 [2018-10-22 15:49:18,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1018, Invalid=4384, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:49:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-22 15:49:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 89. [2018-10-22 15:49:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:49:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-22 15:49:18,825 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-22 15:49:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:18,825 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-22 15:49:18,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:49:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-22 15:49:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:49:18,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:18,826 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:18,826 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:18,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash 81774298, now seen corresponding path program 24 times [2018-10-22 15:49:18,826 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:18,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:18,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:18,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:18,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:19,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:19,139 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:19,146 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:19,174 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-22 15:49:19,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:19,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:19,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:19,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2018-10-22 15:49:19,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:49:19,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:49:19,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:49:19,535 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 39 states. [2018-10-22 15:49:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:21,097 INFO L93 Difference]: Finished difference Result 340 states and 355 transitions. [2018-10-22 15:49:21,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:49:21,097 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 62 [2018-10-22 15:49:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:21,098 INFO L225 Difference]: With dead ends: 340 [2018-10-22 15:49:21,098 INFO L226 Difference]: Without dead ends: 299 [2018-10-22 15:49:21,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1093, Invalid=4759, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:49:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-22 15:49:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 89. [2018-10-22 15:49:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:49:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-22 15:49:21,191 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-22 15:49:21,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:21,191 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-22 15:49:21,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:49:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-22 15:49:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:49:21,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:21,191 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:21,192 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:21,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash -569692570, now seen corresponding path program 25 times [2018-10-22 15:49:21,192 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:21,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:21,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:21,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:21,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 136 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:21,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:21,448 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:21,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:21,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 136 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:21,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:21,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 38 [2018-10-22 15:49:21,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:49:21,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:49:21,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:49:21,803 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 38 states. [2018-10-22 15:49:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:23,286 INFO L93 Difference]: Finished difference Result 388 states and 404 transitions. [2018-10-22 15:49:23,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:49:23,286 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 62 [2018-10-22 15:49:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:23,287 INFO L225 Difference]: With dead ends: 388 [2018-10-22 15:49:23,288 INFO L226 Difference]: Without dead ends: 347 [2018-10-22 15:49:23,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1119, Invalid=4887, Unknown=0, NotChecked=0, Total=6006 [2018-10-22 15:49:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-10-22 15:49:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 89. [2018-10-22 15:49:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:49:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-22 15:49:23,378 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-22 15:49:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:23,379 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-22 15:49:23,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:49:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-22 15:49:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:49:23,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:23,379 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:23,379 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:23,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:23,380 INFO L82 PathProgramCache]: Analyzing trace with hash -977073934, now seen corresponding path program 26 times [2018-10-22 15:49:23,380 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:23,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:23,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:23,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:23,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:23,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:23,641 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:23,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:23,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:23,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:23,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:24,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:24,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 37 [2018-10-22 15:49:24,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:49:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:49:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:49:24,057 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 37 states. [2018-10-22 15:49:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:25,643 INFO L93 Difference]: Finished difference Result 434 states and 451 transitions. [2018-10-22 15:49:25,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-22 15:49:25,644 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 62 [2018-10-22 15:49:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:25,645 INFO L225 Difference]: With dead ends: 434 [2018-10-22 15:49:25,645 INFO L226 Difference]: Without dead ends: 393 [2018-10-22 15:49:25,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1093, Invalid=4759, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:49:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-10-22 15:49:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 89. [2018-10-22 15:49:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:49:25,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-22 15:49:25,748 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-22 15:49:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:25,748 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-22 15:49:25,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:49:25,748 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-22 15:49:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:49:25,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:25,749 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:25,749 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:25,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:25,749 INFO L82 PathProgramCache]: Analyzing trace with hash -897051010, now seen corresponding path program 27 times [2018-10-22 15:49:25,750 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:25,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:25,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:25,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:25,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:26,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:26,111 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:26,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:26,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-22 15:49:26,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:26,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:26,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:26,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 36 [2018-10-22 15:49:26,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:49:26,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:49:26,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:49:26,448 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 36 states. [2018-10-22 15:49:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:28,037 INFO L93 Difference]: Finished difference Result 478 states and 496 transitions. [2018-10-22 15:49:28,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:49:28,037 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 62 [2018-10-22 15:49:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:28,039 INFO L225 Difference]: With dead ends: 478 [2018-10-22 15:49:28,039 INFO L226 Difference]: Without dead ends: 437 [2018-10-22 15:49:28,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1018, Invalid=4384, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:49:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2018-10-22 15:49:28,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 89. [2018-10-22 15:49:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:49:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-22 15:49:28,142 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-22 15:49:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:28,142 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-22 15:49:28,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:49:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-22 15:49:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:49:28,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:28,143 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:28,143 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:28,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:28,143 INFO L82 PathProgramCache]: Analyzing trace with hash 604706570, now seen corresponding path program 28 times [2018-10-22 15:49:28,143 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:28,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:28,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:28,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:28,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:28,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:28,403 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:28,412 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:28,435 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:28,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:28,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:28,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:28,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2018-10-22 15:49:28,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:49:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:49:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:49:28,849 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 35 states. [2018-10-22 15:49:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:30,526 INFO L93 Difference]: Finished difference Result 520 states and 539 transitions. [2018-10-22 15:49:30,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:49:30,527 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2018-10-22 15:49:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:30,528 INFO L225 Difference]: With dead ends: 520 [2018-10-22 15:49:30,528 INFO L226 Difference]: Without dead ends: 479 [2018-10-22 15:49:30,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:49:30,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-10-22 15:49:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 89. [2018-10-22 15:49:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:49:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-10-22 15:49:30,648 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 62 [2018-10-22 15:49:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:30,648 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-10-22 15:49:30,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:49:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-10-22 15:49:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-22 15:49:30,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:30,649 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:30,649 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:30,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1087583594, now seen corresponding path program 8 times [2018-10-22 15:49:30,649 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:30,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:30,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:30,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:30,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:31,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:31,029 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:31,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:31,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:31,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:31,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:31,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:31,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-10-22 15:49:31,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:49:31,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:49:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:49:31,573 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 34 states. [2018-10-22 15:49:33,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:33,144 INFO L93 Difference]: Finished difference Result 565 states and 586 transitions. [2018-10-22 15:49:33,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:49:33,144 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 62 [2018-10-22 15:49:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:33,146 INFO L225 Difference]: With dead ends: 565 [2018-10-22 15:49:33,146 INFO L226 Difference]: Without dead ends: 524 [2018-10-22 15:49:33,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=763, Invalid=3019, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:49:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-10-22 15:49:33,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 92. [2018-10-22 15:49:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-22 15:49:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2018-10-22 15:49:33,254 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 62 [2018-10-22 15:49:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:33,254 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2018-10-22 15:49:33,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:49:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2018-10-22 15:49:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:49:33,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:33,254 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:33,254 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:33,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:33,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2046289104, now seen corresponding path program 16 times [2018-10-22 15:49:33,255 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:33,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:33,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:33,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:33,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:33,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:33,710 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:33,719 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:33,743 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:33,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:33,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:33,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:33,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-22 15:49:33,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:49:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:49:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:49:33,998 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 15 states. [2018-10-22 15:49:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:35,256 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2018-10-22 15:49:35,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:49:35,257 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2018-10-22 15:49:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:35,257 INFO L225 Difference]: With dead ends: 105 [2018-10-22 15:49:35,257 INFO L226 Difference]: Without dead ends: 103 [2018-10-22 15:49:35,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:49:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-22 15:49:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2018-10-22 15:49:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-22 15:49:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2018-10-22 15:49:35,391 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 64 [2018-10-22 15:49:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:35,392 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2018-10-22 15:49:35,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:49:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2018-10-22 15:49:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:49:35,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:35,392 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:35,393 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:35,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash -904360455, now seen corresponding path program 17 times [2018-10-22 15:49:35,394 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:35,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:35,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:35,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:35,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:35,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:35,919 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:35,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:35,961 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-22 15:49:35,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:35,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:36,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:36,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2018-10-22 15:49:36,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:49:36,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:49:36,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:49:36,423 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 46 states. [2018-10-22 15:49:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:37,445 INFO L93 Difference]: Finished difference Result 203 states and 216 transitions. [2018-10-22 15:49:37,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:49:37,445 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 68 [2018-10-22 15:49:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:37,446 INFO L225 Difference]: With dead ends: 203 [2018-10-22 15:49:37,446 INFO L226 Difference]: Without dead ends: 158 [2018-10-22 15:49:37,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=3651, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:49:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-22 15:49:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 98. [2018-10-22 15:49:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:49:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-22 15:49:37,591 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-22 15:49:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:37,592 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-22 15:49:37,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:49:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-22 15:49:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:49:37,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:37,592 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:37,592 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:37,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1644757893, now seen corresponding path program 29 times [2018-10-22 15:49:37,593 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:37,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:37,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:37,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:37,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:37,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:37,935 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:37,945 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:37,980 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-22 15:49:37,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:37,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:38,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:38,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2018-10-22 15:49:38,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:49:38,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:49:38,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:49:38,459 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 45 states. [2018-10-22 15:49:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:39,829 INFO L93 Difference]: Finished difference Result 263 states and 277 transitions. [2018-10-22 15:49:39,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:49:39,829 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 68 [2018-10-22 15:49:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:39,830 INFO L225 Difference]: With dead ends: 263 [2018-10-22 15:49:39,830 INFO L226 Difference]: Without dead ends: 218 [2018-10-22 15:49:39,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:49:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-22 15:49:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 98. [2018-10-22 15:49:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:49:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-22 15:49:39,973 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-22 15:49:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:39,973 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-22 15:49:39,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:49:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-22 15:49:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:49:39,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:39,974 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:39,974 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:39,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:39,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1920035857, now seen corresponding path program 30 times [2018-10-22 15:49:39,975 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:39,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:39,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:39,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:39,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:40,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:40,235 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:40,243 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:40,276 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-22 15:49:40,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:40,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:40,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:40,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 44 [2018-10-22 15:49:40,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:49:40,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:49:40,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:49:40,894 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 44 states. [2018-10-22 15:49:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:42,546 INFO L93 Difference]: Finished difference Result 321 states and 336 transitions. [2018-10-22 15:49:42,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:49:42,546 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 68 [2018-10-22 15:49:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:42,547 INFO L225 Difference]: With dead ends: 321 [2018-10-22 15:49:42,547 INFO L226 Difference]: Without dead ends: 276 [2018-10-22 15:49:42,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:49:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-22 15:49:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 98. [2018-10-22 15:49:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:49:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-22 15:49:42,690 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-22 15:49:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:42,691 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-22 15:49:42,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:49:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-22 15:49:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:49:42,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:42,692 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:42,692 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:42,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:42,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1900902499, now seen corresponding path program 31 times [2018-10-22 15:49:42,692 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:42,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:42,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:42,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:42,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:43,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:43,002 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:43,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:43,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:43,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:43,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 43 [2018-10-22 15:49:43,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:49:43,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:49:43,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1463, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:49:43,435 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 43 states. [2018-10-22 15:49:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:45,296 INFO L93 Difference]: Finished difference Result 377 states and 393 transitions. [2018-10-22 15:49:45,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:49:45,296 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 68 [2018-10-22 15:49:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:45,298 INFO L225 Difference]: With dead ends: 377 [2018-10-22 15:49:45,298 INFO L226 Difference]: Without dead ends: 332 [2018-10-22 15:49:45,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1346, Invalid=5964, Unknown=0, NotChecked=0, Total=7310 [2018-10-22 15:49:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-10-22 15:49:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 98. [2018-10-22 15:49:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:49:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-22 15:49:45,441 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-22 15:49:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:45,441 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-22 15:49:45,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:49:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-22 15:49:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:49:45,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:45,442 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:45,442 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:45,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 727520809, now seen corresponding path program 32 times [2018-10-22 15:49:45,442 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:45,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:45,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:45,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:45,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:45,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:45,792 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:45,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:45,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:45,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:45,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:46,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:46,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2018-10-22 15:49:46,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:49:46,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:49:46,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:49:46,323 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 42 states. [2018-10-22 15:49:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:48,387 INFO L93 Difference]: Finished difference Result 431 states and 448 transitions. [2018-10-22 15:49:48,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:49:48,387 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 68 [2018-10-22 15:49:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:48,388 INFO L225 Difference]: With dead ends: 431 [2018-10-22 15:49:48,388 INFO L226 Difference]: Without dead ends: 386 [2018-10-22 15:49:48,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2438 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1405, Invalid=6251, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:49:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-22 15:49:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 98. [2018-10-22 15:49:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:49:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-22 15:49:48,534 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-22 15:49:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:48,534 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-22 15:49:48,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:49:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-22 15:49:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:49:48,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:48,535 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:48,535 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:48,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:48,535 INFO L82 PathProgramCache]: Analyzing trace with hash 707909557, now seen corresponding path program 33 times [2018-10-22 15:49:48,535 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:48,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:48,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:48,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:48,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:48,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:48,862 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:48,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:48,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:49:48,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:48,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 171 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:49,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:49,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 41 [2018-10-22 15:49:49,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:49:49,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:49:49,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:49:49,303 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 41 states. [2018-10-22 15:49:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:51,519 INFO L93 Difference]: Finished difference Result 483 states and 501 transitions. [2018-10-22 15:49:51,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:49:51,519 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 68 [2018-10-22 15:49:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:51,520 INFO L225 Difference]: With dead ends: 483 [2018-10-22 15:49:51,520 INFO L226 Difference]: Without dead ends: 438 [2018-10-22 15:49:51,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1405, Invalid=6251, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:49:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-10-22 15:49:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 98. [2018-10-22 15:49:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:49:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-22 15:49:51,669 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-22 15:49:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:51,670 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-22 15:49:51,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:49:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-22 15:49:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:49:51,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:51,670 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:51,671 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:51,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1713474625, now seen corresponding path program 34 times [2018-10-22 15:49:51,671 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:51,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:51,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:51,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:51,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:51,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:51,975 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:51,982 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:52,008 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:52,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:52,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 171 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:52,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:52,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 40 [2018-10-22 15:49:52,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:49:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:49:52,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:49:52,366 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 40 states. [2018-10-22 15:49:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:54,647 INFO L93 Difference]: Finished difference Result 533 states and 552 transitions. [2018-10-22 15:49:54,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:49:54,647 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 68 [2018-10-22 15:49:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:54,649 INFO L225 Difference]: With dead ends: 533 [2018-10-22 15:49:54,649 INFO L226 Difference]: Without dead ends: 488 [2018-10-22 15:49:54,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1346, Invalid=5964, Unknown=0, NotChecked=0, Total=7310 [2018-10-22 15:49:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2018-10-22 15:49:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 98. [2018-10-22 15:49:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:49:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-22 15:49:54,798 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-22 15:49:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:54,798 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-22 15:49:54,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:49:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-22 15:49:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:49:54,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:54,799 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:54,799 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:54,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1062007757, now seen corresponding path program 35 times [2018-10-22 15:49:54,800 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:54,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:54,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:54,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:54,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:55,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:55,058 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:55,065 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:55,100 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-22 15:49:55,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:55,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 171 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:55,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:55,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 39 [2018-10-22 15:49:55,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:49:55,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:49:55,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:49:55,444 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 39 states. [2018-10-22 15:49:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:57,986 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2018-10-22 15:49:57,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:49:57,986 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 68 [2018-10-22 15:49:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:57,988 INFO L225 Difference]: With dead ends: 581 [2018-10-22 15:49:57,988 INFO L226 Difference]: Without dead ends: 536 [2018-10-22 15:49:57,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1234, Invalid=5408, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:49:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2018-10-22 15:49:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 98. [2018-10-22 15:49:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:49:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-22 15:49:58,171 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-22 15:49:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:58,171 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-22 15:49:58,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:49:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-22 15:49:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:49:58,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:58,172 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:58,172 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:58,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:58,172 INFO L82 PathProgramCache]: Analyzing trace with hash 654626393, now seen corresponding path program 36 times [2018-10-22 15:49:58,172 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:58,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:58,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:58,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:58,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:58,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:58,415 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:49:58,423 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:58,455 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-22 15:49:58,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:58,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 171 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:58,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:58,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2018-10-22 15:49:58,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:49:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:49:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:49:58,792 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 38 states. [2018-10-22 15:50:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:01,104 INFO L93 Difference]: Finished difference Result 627 states and 648 transitions. [2018-10-22 15:50:01,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:50:01,104 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 68 [2018-10-22 15:50:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:01,106 INFO L225 Difference]: With dead ends: 627 [2018-10-22 15:50:01,106 INFO L226 Difference]: Without dead ends: 582 [2018-10-22 15:50:01,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:50:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2018-10-22 15:50:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 98. [2018-10-22 15:50:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:50:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2018-10-22 15:50:01,272 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 68 [2018-10-22 15:50:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:01,272 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2018-10-22 15:50:01,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:50:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2018-10-22 15:50:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 15:50:01,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:01,273 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:01,273 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:01,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash 734649317, now seen corresponding path program 9 times [2018-10-22 15:50:01,274 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:01,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:01,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:01,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:01,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:01,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:01,561 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:01,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:01,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:50:01,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:01,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:01,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:01,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-22 15:50:01,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:50:01,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:50:01,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:50:01,945 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 37 states. [2018-10-22 15:50:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:04,237 INFO L93 Difference]: Finished difference Result 676 states and 699 transitions. [2018-10-22 15:50:04,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:50:04,237 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2018-10-22 15:50:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:04,239 INFO L225 Difference]: With dead ends: 676 [2018-10-22 15:50:04,239 INFO L226 Difference]: Without dead ends: 631 [2018-10-22 15:50:04,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=905, Invalid=3651, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:50:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2018-10-22 15:50:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 101. [2018-10-22 15:50:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-22 15:50:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2018-10-22 15:50:04,400 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 68 [2018-10-22 15:50:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:04,400 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2018-10-22 15:50:04,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:50:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2018-10-22 15:50:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 15:50:04,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:04,401 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:04,401 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:04,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash -492584077, now seen corresponding path program 18 times [2018-10-22 15:50:04,401 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:04,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:04,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:04,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:04,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:06,502 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-22 15:50:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:06,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:06,583 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:06,595 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:06,646 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-22 15:50:06,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:06,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:06,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:06,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-22 15:50:06,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:50:06,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:50:06,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:50:06,709 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 16 states. [2018-10-22 15:50:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:07,195 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2018-10-22 15:50:07,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:50:07,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2018-10-22 15:50:07,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:07,196 INFO L225 Difference]: With dead ends: 114 [2018-10-22 15:50:07,196 INFO L226 Difference]: Without dead ends: 112 [2018-10-22 15:50:07,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:50:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-22 15:50:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2018-10-22 15:50:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-22 15:50:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2018-10-22 15:50:07,367 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 70 [2018-10-22 15:50:07,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:07,367 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2018-10-22 15:50:07,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:50:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2018-10-22 15:50:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:07,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:07,367 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:07,368 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:07,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:07,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1538237252, now seen corresponding path program 19 times [2018-10-22 15:50:07,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:07,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:07,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:07,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:07,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:07,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:07,648 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:07,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:07,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:08,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:08,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2018-10-22 15:50:08,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-22 15:50:08,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-22 15:50:08,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1955, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:50:08,194 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 50 states. [2018-10-22 15:50:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:09,432 INFO L93 Difference]: Finished difference Result 222 states and 236 transitions. [2018-10-22 15:50:09,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:50:09,432 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 74 [2018-10-22 15:50:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:09,433 INFO L225 Difference]: With dead ends: 222 [2018-10-22 15:50:09,433 INFO L226 Difference]: Without dead ends: 173 [2018-10-22 15:50:09,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1059, Invalid=4343, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:50:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-22 15:50:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 107. [2018-10-22 15:50:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:09,644 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:09,644 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:09,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-22 15:50:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:09,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:09,645 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:09,645 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:09,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:09,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1354925752, now seen corresponding path program 37 times [2018-10-22 15:50:09,645 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:09,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:09,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:09,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:09,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:10,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:10,049 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:10,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:10,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:10,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:10,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 49 [2018-10-22 15:50:10,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:50:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:50:10,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1890, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:50:10,582 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 49 states. [2018-10-22 15:50:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:12,433 INFO L93 Difference]: Finished difference Result 288 states and 303 transitions. [2018-10-22 15:50:12,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:50:12,433 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 74 [2018-10-22 15:50:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:12,434 INFO L225 Difference]: With dead ends: 288 [2018-10-22 15:50:12,434 INFO L226 Difference]: Without dead ends: 239 [2018-10-22 15:50:12,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=5531, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:50:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-22 15:50:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 107. [2018-10-22 15:50:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:12,636 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:12,637 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:12,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:50:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:12,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:12,637 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:12,637 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:12,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1201686740, now seen corresponding path program 38 times [2018-10-22 15:50:12,638 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:12,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:12,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:12,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:12,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:13,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:13,871 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:13,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:13,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:13,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:13,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:15,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:15,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 48 [2018-10-22 15:50:15,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:50:15,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:50:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:50:15,030 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 48 states. [2018-10-22 15:50:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:17,335 INFO L93 Difference]: Finished difference Result 352 states and 368 transitions. [2018-10-22 15:50:17,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:50:17,335 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 74 [2018-10-22 15:50:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:17,336 INFO L225 Difference]: With dead ends: 352 [2018-10-22 15:50:17,337 INFO L226 Difference]: Without dead ends: 303 [2018-10-22 15:50:17,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1471, Invalid=6539, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:50:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-22 15:50:17,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 107. [2018-10-22 15:50:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:17,544 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:17,544 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:17,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:50:17,544 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:17,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:17,545 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:17,545 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:17,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1521906848, now seen corresponding path program 39 times [2018-10-22 15:50:17,545 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:17,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:17,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:17,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:17,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:18,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:18,558 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:18,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:18,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 15:50:18,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:18,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:20,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:20,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 47 [2018-10-22 15:50:20,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:50:20,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:50:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1754, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:50:20,390 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 47 states. [2018-10-22 15:50:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:22,987 INFO L93 Difference]: Finished difference Result 414 states and 431 transitions. [2018-10-22 15:50:22,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:50:22,987 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 74 [2018-10-22 15:50:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:22,988 INFO L225 Difference]: With dead ends: 414 [2018-10-22 15:50:22,988 INFO L226 Difference]: Without dead ends: 365 [2018-10-22 15:50:22,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:50:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-10-22 15:50:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 107. [2018-10-22 15:50:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:23,212 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:23,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:23,212 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:23,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:50:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:23,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:23,213 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 7, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:23,213 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:23,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1027211500, now seen corresponding path program 40 times [2018-10-22 15:50:23,214 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:23,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:23,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:23,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:23,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:24,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:24,499 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:24,506 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:24,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:24,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:24,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:25,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:25,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 46 [2018-10-22 15:50:25,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:50:25,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:50:25,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:50:25,150 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 46 states. [2018-10-22 15:50:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:28,024 INFO L93 Difference]: Finished difference Result 474 states and 492 transitions. [2018-10-22 15:50:28,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:50:28,024 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 74 [2018-10-22 15:50:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:28,025 INFO L225 Difference]: With dead ends: 474 [2018-10-22 15:50:28,025 INFO L226 Difference]: Without dead ends: 425 [2018-10-22 15:50:28,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1725, Invalid=7781, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:50:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2018-10-22 15:50:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 107. [2018-10-22 15:50:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:28,241 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:28,241 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:28,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:50:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:28,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:28,241 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:28,242 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:28,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1302489464, now seen corresponding path program 41 times [2018-10-22 15:50:28,242 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:28,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:28,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:28,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:28,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:28,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:28,572 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:28,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:28,624 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-22 15:50:28,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:28,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:29,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:29,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 45 [2018-10-22 15:50:29,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:50:29,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:50:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:50:29,082 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 45 states. [2018-10-22 15:50:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:32,136 INFO L93 Difference]: Finished difference Result 532 states and 551 transitions. [2018-10-22 15:50:32,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-22 15:50:32,136 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 74 [2018-10-22 15:50:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:32,137 INFO L225 Difference]: With dead ends: 532 [2018-10-22 15:50:32,137 INFO L226 Difference]: Without dead ends: 483 [2018-10-22 15:50:32,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3183 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1759, Invalid=7943, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:50:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-10-22 15:50:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 107. [2018-10-22 15:50:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:32,364 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:32,364 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:32,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:50:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:32,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:32,365 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 7, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:32,365 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:32,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1776518404, now seen corresponding path program 42 times [2018-10-22 15:50:32,365 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:32,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:32,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:32,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:32,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:32,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:32,648 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:32,655 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:32,692 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-22 15:50:32,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:32,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 210 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:33,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:33,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 44 [2018-10-22 15:50:33,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:50:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:50:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:50:33,138 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 44 states. [2018-10-22 15:50:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:36,256 INFO L93 Difference]: Finished difference Result 588 states and 608 transitions. [2018-10-22 15:50:36,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-22 15:50:36,256 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 74 [2018-10-22 15:50:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:36,258 INFO L225 Difference]: With dead ends: 588 [2018-10-22 15:50:36,258 INFO L226 Difference]: Without dead ends: 539 [2018-10-22 15:50:36,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1725, Invalid=7781, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:50:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2018-10-22 15:50:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 107. [2018-10-22 15:50:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:36,481 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:36,481 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:36,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:50:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:36,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:36,482 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:36,482 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:36,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash 109974416, now seen corresponding path program 43 times [2018-10-22 15:50:36,482 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:36,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:36,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:36,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:36,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:36,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:36,748 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:36,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:36,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 210 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:37,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:37,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 43 [2018-10-22 15:50:37,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:50:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:50:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:50:37,408 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 43 states. [2018-10-22 15:50:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:40,685 INFO L93 Difference]: Finished difference Result 642 states and 663 transitions. [2018-10-22 15:50:40,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-22 15:50:40,685 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 74 [2018-10-22 15:50:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:40,687 INFO L225 Difference]: With dead ends: 642 [2018-10-22 15:50:40,687 INFO L226 Difference]: Without dead ends: 593 [2018-10-22 15:50:40,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1626, Invalid=7304, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:50:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-10-22 15:50:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 107. [2018-10-22 15:50:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:40,930 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:40,930 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:40,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:50:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:40,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:40,931 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:40,931 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:40,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:40,931 INFO L82 PathProgramCache]: Analyzing trace with hash 90363164, now seen corresponding path program 44 times [2018-10-22 15:50:40,931 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:40,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:40,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:40,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:40,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:41,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:41,378 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:41,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:41,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:41,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:41,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 210 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:41,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:41,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 42 [2018-10-22 15:50:41,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:50:41,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:50:41,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1379, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:50:41,813 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 42 states. [2018-10-22 15:50:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:45,250 INFO L93 Difference]: Finished difference Result 694 states and 716 transitions. [2018-10-22 15:50:45,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:50:45,250 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 74 [2018-10-22 15:50:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:45,252 INFO L225 Difference]: With dead ends: 694 [2018-10-22 15:50:45,252 INFO L226 Difference]: Without dead ends: 645 [2018-10-22 15:50:45,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1471, Invalid=6539, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:50:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2018-10-22 15:50:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 107. [2018-10-22 15:50:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:45,485 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:45,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:45,486 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:45,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:50:45,486 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:45,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:45,486 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:45,487 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:45,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:45,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1095928232, now seen corresponding path program 45 times [2018-10-22 15:50:45,487 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:45,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:45,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:45,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:45,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:45,786 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:45,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:45,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 15:50:45,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:45,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:46,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2018-10-22 15:50:46,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:50:46,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:50:46,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:50:46,219 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 41 states. [2018-10-22 15:50:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:49,620 INFO L93 Difference]: Finished difference Result 744 states and 767 transitions. [2018-10-22 15:50:49,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:50:49,620 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 74 [2018-10-22 15:50:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:49,622 INFO L225 Difference]: With dead ends: 744 [2018-10-22 15:50:49,622 INFO L226 Difference]: Without dead ends: 695 [2018-10-22 15:50:49,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=5531, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:50:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2018-10-22 15:50:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 107. [2018-10-22 15:50:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:50:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2018-10-22 15:50:49,870 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 74 [2018-10-22 15:50:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:49,871 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2018-10-22 15:50:49,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:50:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2018-10-22 15:50:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:49,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:49,871 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:49,872 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:49,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:49,872 INFO L82 PathProgramCache]: Analyzing trace with hash 444461364, now seen corresponding path program 10 times [2018-10-22 15:50:49,872 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:49,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:49,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:49,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:50,157 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:50,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:50,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:50,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:50,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:50,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-22 15:50:50,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:50:50,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:50:50,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:50:50,697 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 40 states. [2018-10-22 15:50:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:54,071 INFO L93 Difference]: Finished difference Result 797 states and 822 transitions. [2018-10-22 15:50:54,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:50:54,072 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2018-10-22 15:50:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:54,074 INFO L225 Difference]: With dead ends: 797 [2018-10-22 15:50:54,074 INFO L226 Difference]: Without dead ends: 748 [2018-10-22 15:50:54,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1059, Invalid=4343, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:50:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2018-10-22 15:50:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 110. [2018-10-22 15:50:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-22 15:50:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2018-10-22 15:50:54,319 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 74 [2018-10-22 15:50:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:54,319 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2018-10-22 15:50:54,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:50:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2018-10-22 15:50:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-22 15:50:54,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:54,320 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:54,321 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:54,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash -929558858, now seen corresponding path program 20 times [2018-10-22 15:50:54,321 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:54,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:54,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:54,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:54,489 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:54,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:54,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:54,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:54,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:54,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-22 15:50:54,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:54,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:54,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:54,572 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 17 states. [2018-10-22 15:50:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:55,227 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2018-10-22 15:50:55,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:50:55,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2018-10-22 15:50:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:55,228 INFO L225 Difference]: With dead ends: 123 [2018-10-22 15:50:55,228 INFO L226 Difference]: Without dead ends: 121 [2018-10-22 15:50:55,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:50:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-22 15:50:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2018-10-22 15:50:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-22 15:50:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2018-10-22 15:50:55,485 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 76 [2018-10-22 15:50:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:55,485 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2018-10-22 15:50:55,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2018-10-22 15:50:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:50:55,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:55,486 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:55,486 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:55,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:55,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1797828993, now seen corresponding path program 21 times [2018-10-22 15:50:55,487 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:55,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:55,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:55,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:55,930 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:55,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:55,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-22 15:50:55,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:55,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:56,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:56,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2018-10-22 15:50:56,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-22 15:50:56,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-22 15:50:56,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=2287, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:50:56,577 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 54 states. [2018-10-22 15:50:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:58,502 INFO L93 Difference]: Finished difference Result 241 states and 256 transitions. [2018-10-22 15:50:58,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:50:58,502 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 80 [2018-10-22 15:50:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:58,503 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:50:58,503 INFO L226 Difference]: Without dead ends: 188 [2018-10-22 15:50:58,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=5095, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:50:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-10-22 15:50:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 116. [2018-10-22 15:50:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:50:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:50:58,790 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:50:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:58,791 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:50:58,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-22 15:50:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:50:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:50:58,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:58,791 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:58,792 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:58,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash 375902731, now seen corresponding path program 46 times [2018-10-22 15:50:58,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:58,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:58,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:58,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:59,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:59,228 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:50:59,236 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:59,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:59,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:59,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:00,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:00,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2018-10-22 15:51:00,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:51:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:51:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:51:00,069 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 53 states. [2018-10-22 15:51:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:02,413 INFO L93 Difference]: Finished difference Result 313 states and 329 transitions. [2018-10-22 15:51:02,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:51:02,413 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 80 [2018-10-22 15:51:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:02,414 INFO L225 Difference]: With dead ends: 313 [2018-10-22 15:51:02,414 INFO L226 Difference]: Without dead ends: 260 [2018-10-22 15:51:02,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=6525, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:51:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-10-22 15:51:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 116. [2018-10-22 15:51:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:02,734 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:02,734 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:02,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:51:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:02,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:02,735 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:02,735 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:02,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:02,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1964755095, now seen corresponding path program 47 times [2018-10-22 15:51:02,736 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:02,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:02,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:02,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:03,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:03,459 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:03,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:03,523 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:51:03,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:03,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:04,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:04,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 52 [2018-10-22 15:51:04,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:51:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:51:04,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=2145, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:04,489 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 52 states. [2018-10-22 15:51:07,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:07,535 INFO L93 Difference]: Finished difference Result 383 states and 400 transitions. [2018-10-22 15:51:07,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:51:07,535 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 80 [2018-10-22 15:51:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:07,536 INFO L225 Difference]: With dead ends: 383 [2018-10-22 15:51:07,536 INFO L226 Difference]: Without dead ends: 330 [2018-10-22 15:51:07,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3054 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1729, Invalid=7777, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:51:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2018-10-22 15:51:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 116. [2018-10-22 15:51:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:07,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:07,869 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:07,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:07,870 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:07,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:51:07,870 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:07,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:07,870 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:07,870 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:07,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:07,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2033447459, now seen corresponding path program 48 times [2018-10-22 15:51:07,871 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:07,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:07,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:07,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:08,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:08,244 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:08,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:08,290 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-22 15:51:08,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:08,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:08,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:08,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 51 [2018-10-22 15:51:08,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:51:08,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:51:08,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:08,936 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 51 states. [2018-10-22 15:51:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:12,384 INFO L93 Difference]: Finished difference Result 451 states and 469 transitions. [2018-10-22 15:51:12,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:51:12,385 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 80 [2018-10-22 15:51:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:12,386 INFO L225 Difference]: With dead ends: 451 [2018-10-22 15:51:12,386 INFO L226 Difference]: Without dead ends: 398 [2018-10-22 15:51:12,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1933, Invalid=8779, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:51:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2018-10-22 15:51:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 116. [2018-10-22 15:51:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:12,731 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:12,731 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:12,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:51:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:12,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:12,731 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:12,732 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:12,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:12,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2078208337, now seen corresponding path program 49 times [2018-10-22 15:51:12,732 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:12,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:12,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:12,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:13,317 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:13,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:13,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 50 [2018-10-22 15:51:13,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-22 15:51:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-22 15:51:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1995, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:51:13,888 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 50 states. [2018-10-22 15:51:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:17,775 INFO L93 Difference]: Finished difference Result 517 states and 536 transitions. [2018-10-22 15:51:17,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:51:17,776 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 80 [2018-10-22 15:51:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:17,777 INFO L225 Difference]: With dead ends: 517 [2018-10-22 15:51:17,777 INFO L226 Difference]: Without dead ends: 464 [2018-10-22 15:51:17,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2079, Invalid=9477, Unknown=0, NotChecked=0, Total=11556 [2018-10-22 15:51:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2018-10-22 15:51:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 116. [2018-10-22 15:51:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:18,116 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:18,116 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:18,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-22 15:51:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:18,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:18,117 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:18,117 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:18,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:18,117 INFO L82 PathProgramCache]: Analyzing trace with hash 478404155, now seen corresponding path program 50 times [2018-10-22 15:51:18,117 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:18,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:18,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:18,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:18,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:18,486 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:18,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:18,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:18,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:18,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:19,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:19,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 49 [2018-10-22 15:51:19,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:51:19,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:51:19,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1917, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:19,042 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 49 states. [2018-10-22 15:51:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:23,248 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2018-10-22 15:51:23,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-22 15:51:23,248 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 80 [2018-10-22 15:51:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:23,250 INFO L225 Difference]: With dead ends: 581 [2018-10-22 15:51:23,250 INFO L226 Difference]: Without dead ends: 528 [2018-10-22 15:51:23,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2155, Invalid=9835, Unknown=0, NotChecked=0, Total=11990 [2018-10-22 15:51:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2018-10-22 15:51:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 116. [2018-10-22 15:51:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:23,609 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:23,609 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:23,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:51:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:23,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:23,610 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:23,610 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:23,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:23,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2049777863, now seen corresponding path program 51 times [2018-10-22 15:51:23,610 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:23,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:23,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:23,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:23,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:24,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:24,084 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:24,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:24,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-22 15:51:24,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:24,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 253 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:24,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:24,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 48 [2018-10-22 15:51:24,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:51:24,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:51:24,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:51:24,637 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 48 states. [2018-10-22 15:51:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:29,181 INFO L93 Difference]: Finished difference Result 643 states and 664 transitions. [2018-10-22 15:51:29,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-22 15:51:29,181 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 80 [2018-10-22 15:51:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:29,183 INFO L225 Difference]: With dead ends: 643 [2018-10-22 15:51:29,183 INFO L226 Difference]: Without dead ends: 590 [2018-10-22 15:51:29,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4032 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2155, Invalid=9835, Unknown=0, NotChecked=0, Total=11990 [2018-10-22 15:51:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2018-10-22 15:51:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 116. [2018-10-22 15:51:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:29,523 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:29,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:29,524 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:29,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:51:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:29,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:29,525 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:29,525 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:29,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash 303928915, now seen corresponding path program 52 times [2018-10-22 15:51:29,525 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:29,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:29,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:29,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:29,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:29,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:29,873 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:29,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:29,909 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:29,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:29,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 253 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:30,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:30,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 47 [2018-10-22 15:51:30,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:51:30,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:51:30,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:30,389 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 47 states. [2018-10-22 15:51:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:34,990 INFO L93 Difference]: Finished difference Result 703 states and 725 transitions. [2018-10-22 15:51:34,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-22 15:51:34,990 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 80 [2018-10-22 15:51:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:34,993 INFO L225 Difference]: With dead ends: 703 [2018-10-22 15:51:34,993 INFO L226 Difference]: Without dead ends: 650 [2018-10-22 15:51:34,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3875 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2079, Invalid=9477, Unknown=0, NotChecked=0, Total=11556 [2018-10-22 15:51:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2018-10-22 15:51:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 116. [2018-10-22 15:51:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:35,325 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:35,325 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:35,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:51:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:35,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:35,326 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:35,327 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:35,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:35,327 INFO L82 PathProgramCache]: Analyzing trace with hash 579206879, now seen corresponding path program 53 times [2018-10-22 15:51:35,327 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:35,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:35,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:35,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:35,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:35,628 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:35,637 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:35,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:51:35,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:35,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 253 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:36,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:36,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 46 [2018-10-22 15:51:36,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:51:36,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:51:36,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1671, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:51:36,133 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 46 states. [2018-10-22 15:51:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:40,854 INFO L93 Difference]: Finished difference Result 761 states and 784 transitions. [2018-10-22 15:51:40,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-22 15:51:40,854 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 80 [2018-10-22 15:51:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:40,856 INFO L225 Difference]: With dead ends: 761 [2018-10-22 15:51:40,856 INFO L226 Difference]: Without dead ends: 708 [2018-10-22 15:51:40,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1933, Invalid=8779, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:51:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2018-10-22 15:51:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 116. [2018-10-22 15:51:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:41,212 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:41,212 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:41,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:51:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:41,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:41,213 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:41,213 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:41,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:41,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1053235819, now seen corresponding path program 54 times [2018-10-22 15:51:41,213 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:41,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:41,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:41,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:41,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:41,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:41,690 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:41,699 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:41,736 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-22 15:51:41,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:41,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 253 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:42,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:42,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 45 [2018-10-22 15:51:42,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:51:42,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:51:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:42,188 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 45 states. [2018-10-22 15:51:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:46,900 INFO L93 Difference]: Finished difference Result 817 states and 841 transitions. [2018-10-22 15:51:46,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:51:46,900 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 80 [2018-10-22 15:51:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:46,902 INFO L225 Difference]: With dead ends: 817 [2018-10-22 15:51:46,902 INFO L226 Difference]: Without dead ends: 764 [2018-10-22 15:51:46,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1729, Invalid=7777, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:51:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-10-22 15:51:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 116. [2018-10-22 15:51:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:47,245 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:47,245 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:47,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:51:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:47,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:47,246 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:47,246 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:47,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:47,246 INFO L82 PathProgramCache]: Analyzing trace with hash -613308169, now seen corresponding path program 55 times [2018-10-22 15:51:47,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:47,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:47,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:47,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:47,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:47,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:47,543 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:47,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:47,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 253 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:48,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:48,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2018-10-22 15:51:48,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:51:48,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:51:48,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1497, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:51:48,068 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 44 states. [2018-10-22 15:51:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:52,797 INFO L93 Difference]: Finished difference Result 871 states and 896 transitions. [2018-10-22 15:51:52,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:51:52,798 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 80 [2018-10-22 15:51:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:52,800 INFO L225 Difference]: With dead ends: 871 [2018-10-22 15:51:52,800 INFO L226 Difference]: Without dead ends: 818 [2018-10-22 15:51:52,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=6525, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:51:52,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2018-10-22 15:51:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 116. [2018-10-22 15:51:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2018-10-22 15:51:53,143 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 80 [2018-10-22 15:51:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:53,143 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2018-10-22 15:51:53,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:51:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2018-10-22 15:51:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 15:51:53,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:53,144 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:53,144 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:53,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash -632919421, now seen corresponding path program 11 times [2018-10-22 15:51:53,144 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:53,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:53,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:53,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:53,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:53,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:53,453 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:53,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:53,495 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:51:53,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:53,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:54,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:54,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-10-22 15:51:54,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:51:54,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:51:54,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:54,163 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 43 states. [2018-10-22 15:51:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:58,815 INFO L93 Difference]: Finished difference Result 928 states and 955 transitions. [2018-10-22 15:51:58,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:51:58,816 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 80 [2018-10-22 15:51:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:58,819 INFO L225 Difference]: With dead ends: 928 [2018-10-22 15:51:58,819 INFO L226 Difference]: Without dead ends: 875 [2018-10-22 15:51:58,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1225, Invalid=5095, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:51:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2018-10-22 15:51:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 119. [2018-10-22 15:51:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-22 15:51:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2018-10-22 15:51:59,182 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 80 [2018-10-22 15:51:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:59,182 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2018-10-22 15:51:59,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:51:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2018-10-22 15:51:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:51:59,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:59,183 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:59,183 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:59,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:59,183 INFO L82 PathProgramCache]: Analyzing trace with hash -5497607, now seen corresponding path program 22 times [2018-10-22 15:51:59,183 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:59,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:59,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:59,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:59,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:59,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:59,332 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:51:59,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:59,371 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:59,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:59,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:59,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:59,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-22 15:51:59,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:51:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:51:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:51:59,504 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand 18 states. [2018-10-22 15:52:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:00,358 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2018-10-22 15:52:00,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:52:00,358 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-10-22 15:52:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:00,359 INFO L225 Difference]: With dead ends: 132 [2018-10-22 15:52:00,359 INFO L226 Difference]: Without dead ends: 130 [2018-10-22 15:52:00,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:52:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-22 15:52:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2018-10-22 15:52:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-22 15:52:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2018-10-22 15:52:00,720 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 82 [2018-10-22 15:52:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:00,720 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2018-10-22 15:52:00,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:52:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2018-10-22 15:52:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-22 15:52:00,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:00,720 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:00,721 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:00,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:00,721 INFO L82 PathProgramCache]: Analyzing trace with hash -354122942, now seen corresponding path program 23 times [2018-10-22 15:52:00,721 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:00,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:00,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:00,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:00,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:01,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:01,077 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:01,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:01,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-22 15:52:01,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:01,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:01,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:01,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 58 [2018-10-22 15:52:01,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-22 15:52:01,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-22 15:52:01,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=2645, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:52:01,896 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand 58 states. [2018-10-22 15:52:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:03,985 INFO L93 Difference]: Finished difference Result 260 states and 276 transitions. [2018-10-22 15:52:03,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:52:03,985 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 86 [2018-10-22 15:52:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:03,986 INFO L225 Difference]: With dead ends: 260 [2018-10-22 15:52:03,986 INFO L226 Difference]: Without dead ends: 203 [2018-10-22 15:52:03,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1403, Invalid=5907, Unknown=0, NotChecked=0, Total=7310 [2018-10-22 15:52:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-22 15:52:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 125. [2018-10-22 15:52:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-22 15:52:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-22 15:52:04,399 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-22 15:52:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:04,399 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-22 15:52:04,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-22 15:52:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-22 15:52:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-22 15:52:04,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:04,400 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:04,400 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:04,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:04,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1095815730, now seen corresponding path program 56 times [2018-10-22 15:52:04,400 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:04,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:04,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:04,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:04,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 300 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:04,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:04,761 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:04,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:04,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:04,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:04,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 300 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:05,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:05,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2018-10-22 15:52:05,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-22 15:52:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-22 15:52:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=2570, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:52:05,482 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 57 states. [2018-10-22 15:52:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:08,411 INFO L93 Difference]: Finished difference Result 338 states and 355 transitions. [2018-10-22 15:52:08,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:52:08,411 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 86 [2018-10-22 15:52:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:08,412 INFO L225 Difference]: With dead ends: 338 [2018-10-22 15:52:08,412 INFO L226 Difference]: Without dead ends: 281 [2018-10-22 15:52:08,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=7601, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:52:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-22 15:52:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 125. [2018-10-22 15:52:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-22 15:52:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-22 15:52:08,845 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-22 15:52:08,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:08,845 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-22 15:52:08,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-22 15:52:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-22 15:52:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-22 15:52:08,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:08,846 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:08,846 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:08,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:08,846 INFO L82 PathProgramCache]: Analyzing trace with hash 905644890, now seen corresponding path program 57 times [2018-10-22 15:52:08,847 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:08,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:08,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:08,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:08,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 300 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:09,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:09,492 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:09,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:09,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-22 15:52:09,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:09,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 300 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:10,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:10,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 56 [2018-10-22 15:52:10,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-22 15:52:10,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-22 15:52:10,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=587, Invalid=2493, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:52:10,163 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 56 states. [2018-10-22 15:52:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:13,941 INFO L93 Difference]: Finished difference Result 414 states and 432 transitions. [2018-10-22 15:52:13,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:52:13,941 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 86 [2018-10-22 15:52:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:13,942 INFO L225 Difference]: With dead ends: 414 [2018-10-22 15:52:13,942 INFO L226 Difference]: Without dead ends: 357 [2018-10-22 15:52:13,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2008, Invalid=9122, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 15:52:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-10-22 15:52:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 125. [2018-10-22 15:52:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-22 15:52:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2018-10-22 15:52:14,377 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 86 [2018-10-22 15:52:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:14,377 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2018-10-22 15:52:14,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-22 15:52:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2018-10-22 15:52:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-22 15:52:14,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:14,378 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:14,378 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:14,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:14,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1787241498, now seen corresponding path program 58 times [2018-10-22 15:52:14,379 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:14,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:14,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:14,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:14,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 300 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:14,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:14,833 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 15:52:14,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:14,875 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:14,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:14,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 300 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:15,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:15,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2018-10-22 15:52:15,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-22 15:52:15,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-22 15:52:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2414, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:52:15,483 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 55 states. [2018-10-22 15:52:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:19,766 INFO L93 Difference]: Finished difference Result 488 states and 507 transitions. [2018-10-22 15:52:19,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-22 15:52:19,767 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 86 [2018-10-22 15:52:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:19,768 INFO L225 Difference]: With dead ends: 488 [2018-10-22 15:52:19,769 INFO L226 Difference]: Without dead ends: 431 [2018-10-22 15:52:19,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2267, Invalid=10389, Unknown=0, NotChecked=0, Total=12656 [2018-10-22 15:52:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. Received shutdown request... [2018-10-22 15:52:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 125. [2018-10-22 15:52:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-22 15:52:20,220 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:52:20,225 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:52:20,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:52:20 BoogieIcfgContainer [2018-10-22 15:52:20,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:52:20,226 INFO L168 Benchmark]: Toolchain (without parser) took 244160.23 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 671.1 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -337.8 MB). Peak memory consumption was 333.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:52:20,226 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:52:20,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:52:20,227 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:52:20,227 INFO L168 Benchmark]: Boogie Preprocessor took 28.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:52:20,227 INFO L168 Benchmark]: RCFGBuilder took 601.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -799.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-10-22 15:52:20,228 INFO L168 Benchmark]: TraceAbstraction took 243218.55 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -80.2 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 450.8 MB). Peak memory consumption was 370.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:52:20,230 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 601.43 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -799.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243218.55 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -80.2 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 450.8 MB). Peak memory consumption was 370.6 MB. Max. memory is 7.1 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 ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. TIMEOUT Result, 243.1s OverallTime, 95 OverallIterations, 13 TraceHistogramMax, 152.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3132 SDtfs, 14935 SDslu, 33406 SDs, 0 SdLazy, 27723 SolverSat, 4663 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10098 GetRequests, 4399 SyntacticMatches, 0 SemanticMatches, 5699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133658 ImplicationChecksByTransitivity, 116.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=92, 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: 13.0s AutomataMinimizationTime, 95 MinimizatonAttempts, 19347 StatesRemovedByMinimization, 93 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 70.5s InterpolantComputationTime, 10894 NumberOfCodeBlocks, 10894 NumberOfCodeBlocksAsserted, 561 NumberOfCheckSat, 10707 ConstructedInterpolants, 0 QuantifiedInterpolants, 4201656 SizeOfPredicates, 438 NumberOfNonLiveVariables, 14672 ConjunctsInSsa, 1946 ConjunctsInUnsatCore, 187 InterpolantComputations, 3 PerfectInterpolantSequences, 24446/35626 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown