java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:13:03,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:13:03,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:13:03,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 06:13:03,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:13:03,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:13:03,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:13:03,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:13:03,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:13:03,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:13:03,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:13:03,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:13:03,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:13:03,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:13:03,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:13:03,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:13:03,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:13:03,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:13:03,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:13:03,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:13:03,275 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 06:13:03,290 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:13:03,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:13:03,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:13:03,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:13:03,292 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:13:03,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:13:03,292 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:13:03,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:13:03,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:13:03,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:13:03,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:13:03,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:13:03,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:13:03,294 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:13:03,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:13:03,294 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:13:03,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:13:03,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:13:03,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:13:03,295 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:13:03,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:13:03,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:13:03,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:13:03,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:13:03,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:13:03,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:13:03,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:13:03,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:13:03,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:13:03,326 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:13:03,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:13:03,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:13:03,344 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:13:03,345 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:13:03,345 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2019-09-08 06:13:03,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b5c1b578/e678b6c5cdc542e1aca59b395051f972/FLAGdcfb33973 [2019-09-08 06:13:03,828 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:13:03,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2019-09-08 06:13:03,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b5c1b578/e678b6c5cdc542e1aca59b395051f972/FLAGdcfb33973 [2019-09-08 06:13:04,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b5c1b578/e678b6c5cdc542e1aca59b395051f972 [2019-09-08 06:13:04,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:13:04,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:13:04,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:04,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:13:04,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:13:04,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:04" (1/1) ... [2019-09-08 06:13:04,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5694f1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04, skipping insertion in model container [2019-09-08 06:13:04,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:04" (1/1) ... [2019-09-08 06:13:04,275 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:13:04,288 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:13:04,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:04,435 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:13:04,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:04,460 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:13:04,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04 WrapperNode [2019-09-08 06:13:04,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:04,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:13:04,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:13:04,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:13:04,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04" (1/1) ... [2019-09-08 06:13:04,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04" (1/1) ... [2019-09-08 06:13:04,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04" (1/1) ... [2019-09-08 06:13:04,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04" (1/1) ... [2019-09-08 06:13:04,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04" (1/1) ... [2019-09-08 06:13:04,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04" (1/1) ... [2019-09-08 06:13:04,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04" (1/1) ... [2019-09-08 06:13:04,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:13:04,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:13:04,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:13:04,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:13:04,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:13:04,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:13:04,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:13:04,625 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-09-08 06:13:04,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:13:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:13:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:13:04,625 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-09-08 06:13:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:13:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:13:04,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:13:04,797 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:13:04,798 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:13:04,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:04 BoogieIcfgContainer [2019-09-08 06:13:04,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:13:04,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:13:04,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:13:04,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:13:04,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:13:04" (1/3) ... [2019-09-08 06:13:04,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6e74f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:04, skipping insertion in model container [2019-09-08 06:13:04,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:04" (2/3) ... [2019-09-08 06:13:04,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6e74f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:04, skipping insertion in model container [2019-09-08 06:13:04,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:04" (3/3) ... [2019-09-08 06:13:04,807 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_20-2.c [2019-09-08 06:13:04,817 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:13:04,824 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:13:04,852 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:13:04,935 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:13:04,936 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:13:04,936 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:13:04,936 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:13:04,936 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:13:04,936 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:13:04,937 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:13:04,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:13:04,937 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:13:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-08 06:13:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:13:04,962 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:04,963 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:04,965 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2019-09-08 06:13:04,971 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:04,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:05,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:05,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:13:05,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:05,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:05,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:05,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:05,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:05,165 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2019-09-08 06:13:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:05,319 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-09-08 06:13:05,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:05,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:13:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:05,340 INFO L225 Difference]: With dead ends: 35 [2019-09-08 06:13:05,341 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:13:05,346 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:13:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:13:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:13:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:13:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:13:05,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-09-08 06:13:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:05,416 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:13:05,417 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:13:05,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:13:05,419 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:05,420 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:05,421 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2019-09-08 06:13:05,423 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:05,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:05,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:05,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:13:05,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:05,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:05,520 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:05,524 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-09-08 06:13:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:05,604 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-09-08 06:13:05,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:05,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:13:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:05,608 INFO L225 Difference]: With dead ends: 27 [2019-09-08 06:13:05,608 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:13:05,609 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:13:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:13:05,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-09-08 06:13:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:13:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:13:05,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2019-09-08 06:13:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:05,622 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:13:05,622 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:13:05,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:13:05,624 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:05,624 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:05,625 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2019-09-08 06:13:05,625 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:05,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:05,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:05,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:13:05,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:05,705 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:05,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:05,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:13:05,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:05,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-09-08 06:13:05,846 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:13:05,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:13:05,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:13:05,847 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2019-09-08 06:13:05,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:05,968 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-09-08 06:13:05,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:13:05,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-09-08 06:13:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:05,970 INFO L225 Difference]: With dead ends: 38 [2019-09-08 06:13:05,970 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:13:05,971 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:05,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:13:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-08 06:13:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 06:13:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-08 06:13:05,979 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2019-09-08 06:13:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:05,982 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-08 06:13:05,982 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:13:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-08 06:13:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:13:05,984 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:05,984 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:05,985 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2019-09-08 06:13:05,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:05,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:05,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:05,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:13:06,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:06,043 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:06,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:06,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:06,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:13:06,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:06,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:13:06,105 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:13:06,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:13:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:13:06,106 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2019-09-08 06:13:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:06,208 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-09-08 06:13:06,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:13:06,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-09-08 06:13:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:06,211 INFO L225 Difference]: With dead ends: 32 [2019-09-08 06:13:06,211 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 06:13:06,212 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:13:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 06:13:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 06:13:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 06:13:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-09-08 06:13:06,221 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2019-09-08 06:13:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:06,221 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-09-08 06:13:06,222 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:13:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-09-08 06:13:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:13:06,223 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:06,224 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:06,224 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:06,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:06,225 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2019-09-08 06:13:06,225 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:06,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:06,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:06,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-08 06:13:06,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:06,367 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:06,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:06,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:06,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:06,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:06,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:13:06,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:06,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-08 06:13:06,491 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:06,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:06,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:06,492 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 13 states. [2019-09-08 06:13:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:06,871 INFO L93 Difference]: Finished difference Result 66 states and 99 transitions. [2019-09-08 06:13:06,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:06,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-09-08 06:13:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:06,874 INFO L225 Difference]: With dead ends: 66 [2019-09-08 06:13:06,874 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 06:13:06,875 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:13:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 06:13:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-09-08 06:13:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:06,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:13:06,893 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 40 [2019-09-08 06:13:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:06,893 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:13:06,894 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:13:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-08 06:13:06,904 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:06,905 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:06,905 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 3 times [2019-09-08 06:13:06,906 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:06,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:06,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:06,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-08 06:13:07,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:07,055 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:07,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:07,098 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-08 06:13:07,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:07,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:07,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-08 06:13:07,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:07,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:13:07,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:13:07,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:13:07,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:13:07,146 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 7 states. [2019-09-08 06:13:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:07,249 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-09-08 06:13:07,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:13:07,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2019-09-08 06:13:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:07,252 INFO L225 Difference]: With dead ends: 49 [2019-09-08 06:13:07,253 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 06:13:07,253 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:13:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 06:13:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-09-08 06:13:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:13:07,266 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 68 [2019-09-08 06:13:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:07,267 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:13:07,267 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:13:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:13:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-08 06:13:07,268 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:07,269 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:07,269 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 4 times [2019-09-08 06:13:07,273 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:07,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:07,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:07,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 46 proven. 109 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-09-08 06:13:07,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:07,395 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:07,408 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:07,439 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:07,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:07,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:13:07,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 93 proven. 162 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-09-08 06:13:07,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:07,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2019-09-08 06:13:07,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:07,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:07,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:07,566 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 13 states. [2019-09-08 06:13:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:07,986 INFO L93 Difference]: Finished difference Result 93 states and 141 transitions. [2019-09-08 06:13:07,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:13:07,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2019-09-08 06:13:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:07,993 INFO L225 Difference]: With dead ends: 93 [2019-09-08 06:13:07,994 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 06:13:07,997 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:13:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 06:13:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-09-08 06:13:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:13:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2019-09-08 06:13:08,020 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 96 [2019-09-08 06:13:08,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:08,020 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2019-09-08 06:13:08,021 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:08,021 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2019-09-08 06:13:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-08 06:13:08,026 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:08,027 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:08,027 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2019-09-08 06:13:08,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:08,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:08,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:08,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:08,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 106 proven. 211 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-09-08 06:13:08,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:08,197 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:08,227 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:08,280 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-08 06:13:08,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:08,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:13:08,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2019-09-08 06:13:08,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:08,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 14 [2019-09-08 06:13:08,477 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:13:08,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:13:08,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:13:08,479 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 14 states. [2019-09-08 06:13:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:08,995 INFO L93 Difference]: Finished difference Result 118 states and 193 transitions. [2019-09-08 06:13:08,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:13:08,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2019-09-08 06:13:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:09,000 INFO L225 Difference]: With dead ends: 118 [2019-09-08 06:13:09,001 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 06:13:09,005 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2019-09-08 06:13:09,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 06:13:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2019-09-08 06:13:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:13:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2019-09-08 06:13:09,029 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 136 [2019-09-08 06:13:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:09,029 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2019-09-08 06:13:09,029 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:13:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2019-09-08 06:13:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-08 06:13:09,031 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:09,032 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:09,032 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:09,032 INFO L82 PathProgramCache]: Analyzing trace with hash -509498553, now seen corresponding path program 6 times [2019-09-08 06:13:09,033 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:09,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:09,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:09,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:09,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 162 proven. 486 refuted. 0 times theorem prover too weak. 1593 trivial. 0 not checked. [2019-09-08 06:13:09,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:09,187 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:09,201 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:09,275 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-09-08 06:13:09,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:09,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:13:09,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 236 proven. 396 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [2019-09-08 06:13:09,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:09,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-09-08 06:13:09,365 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:13:09,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:13:09,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:13:09,370 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand 11 states. [2019-09-08 06:13:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:09,526 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2019-09-08 06:13:09,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:13:09,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 204 [2019-09-08 06:13:09,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:09,529 INFO L225 Difference]: With dead ends: 77 [2019-09-08 06:13:09,529 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 06:13:09,530 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 06:13:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-08 06:13:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-08 06:13:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2019-09-08 06:13:09,542 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 204 [2019-09-08 06:13:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:09,543 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2019-09-08 06:13:09,543 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:13:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2019-09-08 06:13:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-09-08 06:13:09,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:09,548 INFO L399 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:09,548 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 7 times [2019-09-08 06:13:09,549 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:09,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:09,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:09,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:09,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2019-09-08 06:13:09,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:09,783 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:09,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:09,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:13:09,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2019-09-08 06:13:09,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:09,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-09-08 06:13:09,976 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:13:09,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:13:09,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:13:09,977 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 11 states. [2019-09-08 06:13:10,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:10,184 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-09-08 06:13:10,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:13:10,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 286 [2019-09-08 06:13:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:10,188 INFO L225 Difference]: With dead ends: 82 [2019-09-08 06:13:10,188 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 06:13:10,189 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 06:13:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-08 06:13:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 06:13:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 117 transitions. [2019-09-08 06:13:10,201 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 117 transitions. Word has length 286 [2019-09-08 06:13:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:10,202 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 117 transitions. [2019-09-08 06:13:10,202 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:13:10,202 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 117 transitions. [2019-09-08 06:13:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2019-09-08 06:13:10,227 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:10,228 INFO L399 BasicCegarLoop]: trace histogram [119, 119, 95, 59, 59, 59, 59, 59, 59, 59, 36, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:10,228 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:10,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:10,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1038956340, now seen corresponding path program 8 times [2019-09-08 06:13:10,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:10,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:10,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:10,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:10,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 39393 backedges. 568 proven. 4367 refuted. 0 times theorem prover too weak. 34458 trivial. 0 not checked. [2019-09-08 06:13:11,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:11,092 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:11,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:11,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:11,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:11,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 1813 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:13:11,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 39393 backedges. 568 proven. 4367 refuted. 0 times theorem prover too weak. 34458 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:11,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:11,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-09-08 06:13:11,739 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:13:11,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:13:11,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:11,740 INFO L87 Difference]: Start difference. First operand 78 states and 117 transitions. Second operand 12 states. [2019-09-08 06:13:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:11,989 INFO L93 Difference]: Finished difference Result 87 states and 139 transitions. [2019-09-08 06:13:11,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:13:11,989 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 816 [2019-09-08 06:13:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:11,996 INFO L225 Difference]: With dead ends: 87 [2019-09-08 06:13:11,997 INFO L226 Difference]: Without dead ends: 83 [2019-09-08 06:13:11,997 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:13:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-08 06:13:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-08 06:13:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-08 06:13:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 133 transitions. [2019-09-08 06:13:12,010 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 133 transitions. Word has length 816 [2019-09-08 06:13:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:12,011 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 133 transitions. [2019-09-08 06:13:12,011 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:13:12,011 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 133 transitions. [2019-09-08 06:13:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1253 [2019-09-08 06:13:12,026 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:12,026 INFO L399 BasicCegarLoop]: trace histogram [183, 183, 147, 91, 91, 91, 91, 91, 91, 91, 56, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:12,027 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:12,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1658606196, now seen corresponding path program 9 times [2019-09-08 06:13:12,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:12,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:12,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:12,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:12,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 93723 backedges. 1000 proven. 6783 refuted. 0 times theorem prover too weak. 85940 trivial. 0 not checked. [2019-09-08 06:13:13,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:13,140 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:13,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:13,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2019-09-08 06:13:13,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:13,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:13:13,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 93723 backedges. 20170 proven. 71 refuted. 0 times theorem prover too weak. 73482 trivial. 0 not checked. [2019-09-08 06:13:13,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:13,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2019-09-08 06:13:13,973 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:13:13,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:13:13,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:13,974 INFO L87 Difference]: Start difference. First operand 83 states and 133 transitions. Second operand 18 states. [2019-09-08 06:13:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:14,974 INFO L93 Difference]: Finished difference Result 198 states and 410 transitions. [2019-09-08 06:13:14,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-08 06:13:14,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1252 [2019-09-08 06:13:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:14,977 INFO L225 Difference]: With dead ends: 198 [2019-09-08 06:13:14,978 INFO L226 Difference]: Without dead ends: 129 [2019-09-08 06:13:14,980 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1305 GetRequests, 1254 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=661, Invalid=2095, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 06:13:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-08 06:13:14,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2019-09-08 06:13:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-08 06:13:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 176 transitions. [2019-09-08 06:13:14,994 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 176 transitions. Word has length 1252 [2019-09-08 06:13:14,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:14,995 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 176 transitions. [2019-09-08 06:13:14,995 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:13:14,995 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 176 transitions. [2019-09-08 06:13:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2019-09-08 06:13:15,008 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:15,009 INFO L399 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:15,009 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:15,010 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 10 times [2019-09-08 06:13:15,010 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:15,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:15,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:15,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:15,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1164 proven. 8218 refuted. 0 times theorem prover too weak. 78387 trivial. 0 not checked. [2019-09-08 06:13:16,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:16,020 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:16,031 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:16,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:16,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:16,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:13:16,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1164 proven. 8218 refuted. 0 times theorem prover too weak. 78387 trivial. 0 not checked. [2019-09-08 06:13:17,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:17,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2019-09-08 06:13:17,186 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:13:17,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:13:17,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:13:17,187 INFO L87 Difference]: Start difference. First operand 118 states and 176 transitions. Second operand 14 states. [2019-09-08 06:13:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:17,490 INFO L93 Difference]: Finished difference Result 127 states and 197 transitions. [2019-09-08 06:13:17,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:13:17,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1212 [2019-09-08 06:13:17,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:17,496 INFO L225 Difference]: With dead ends: 127 [2019-09-08 06:13:17,496 INFO L226 Difference]: Without dead ends: 123 [2019-09-08 06:13:17,497 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1244 GetRequests, 1222 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:13:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-08 06:13:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2019-09-08 06:13:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-09-08 06:13:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 191 transitions. [2019-09-08 06:13:17,513 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 191 transitions. Word has length 1212 [2019-09-08 06:13:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:17,514 INFO L475 AbstractCegarLoop]: Abstraction has 123 states and 191 transitions. [2019-09-08 06:13:17,514 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:13:17,515 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 191 transitions. [2019-09-08 06:13:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2248 [2019-09-08 06:13:17,555 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:17,556 INFO L399 BasicCegarLoop]: trace histogram [329, 329, 266, 164, 164, 164, 164, 164, 164, 164, 102, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:17,556 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1173251755, now seen corresponding path program 11 times [2019-09-08 06:13:17,557 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:17,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:17,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:17,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:17,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 304533 backedges. 2259 proven. 17445 refuted. 0 times theorem prover too weak. 284829 trivial. 0 not checked. [2019-09-08 06:13:20,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:20,472 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:20,495 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:23,498 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 270 check-sat command(s) [2019-09-08 06:13:23,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:23,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 4833 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-08 06:13:23,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 304533 backedges. 145037 proven. 10604 refuted. 0 times theorem prover too weak. 148892 trivial. 0 not checked. [2019-09-08 06:13:25,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:25,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 26 [2019-09-08 06:13:25,559 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 06:13:25,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 06:13:25,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:13:25,560 INFO L87 Difference]: Start difference. First operand 123 states and 191 transitions. Second operand 26 states. [2019-09-08 06:13:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:27,623 INFO L93 Difference]: Finished difference Result 318 states and 754 transitions. [2019-09-08 06:13:27,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-08 06:13:27,624 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 2247 [2019-09-08 06:13:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:27,629 INFO L225 Difference]: With dead ends: 318 [2019-09-08 06:13:27,630 INFO L226 Difference]: Without dead ends: 209 [2019-09-08 06:13:27,635 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2327 GetRequests, 2247 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1230, Invalid=5412, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 06:13:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-09-08 06:13:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 187. [2019-09-08 06:13:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-09-08 06:13:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 294 transitions. [2019-09-08 06:13:27,689 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 294 transitions. Word has length 2247 [2019-09-08 06:13:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:27,692 INFO L475 AbstractCegarLoop]: Abstraction has 187 states and 294 transitions. [2019-09-08 06:13:27,693 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 06:13:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 294 transitions. [2019-09-08 06:13:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3637 [2019-09-08 06:13:27,837 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:27,839 INFO L399 BasicCegarLoop]: trace histogram [533, 533, 431, 266, 266, 266, 266, 266, 266, 266, 165, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:27,839 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1843980809, now seen corresponding path program 12 times [2019-09-08 06:13:27,841 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:27,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:27,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:27,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:27,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 800757 backedges. 3737 proven. 28594 refuted. 0 times theorem prover too weak. 768426 trivial. 0 not checked. [2019-09-08 06:13:35,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:35,099 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:35,115 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:13:35,370 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2019-09-08 06:13:35,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:35,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:13:35,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 800757 backedges. 5672 proven. 23676 refuted. 0 times theorem prover too weak. 771409 trivial. 0 not checked. [2019-09-08 06:13:39,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:39,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-09-08 06:13:39,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:13:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:13:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:13:39,715 INFO L87 Difference]: Start difference. First operand 187 states and 294 transitions. Second operand 16 states. [2019-09-08 06:13:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:40,016 INFO L93 Difference]: Finished difference Result 196 states and 318 transitions. [2019-09-08 06:13:40,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:40,017 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 3636 [2019-09-08 06:13:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:40,024 INFO L225 Difference]: With dead ends: 196 [2019-09-08 06:13:40,024 INFO L226 Difference]: Without dead ends: 192 [2019-09-08 06:13:40,025 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3672 GetRequests, 3646 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:13:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-09-08 06:13:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2019-09-08 06:13:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-09-08 06:13:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 312 transitions. [2019-09-08 06:13:40,041 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 312 transitions. Word has length 3636 [2019-09-08 06:13:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:40,042 INFO L475 AbstractCegarLoop]: Abstraction has 192 states and 312 transitions. [2019-09-08 06:13:40,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:13:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 312 transitions. [2019-09-08 06:13:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5884 [2019-09-08 06:13:40,238 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:40,240 INFO L399 BasicCegarLoop]: trace histogram [863, 863, 698, 431, 431, 431, 431, 431, 431, 431, 267, 165, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:40,241 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2104614200, now seen corresponding path program 13 times [2019-09-08 06:13:40,242 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:40,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:40,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:40,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:40,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2101725 backedges. 6518 proven. 51127 refuted. 0 times theorem prover too weak. 2044080 trivial. 0 not checked. [2019-09-08 06:13:55,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:55,648 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:55,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:57,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 13063 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:13:57,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2101725 backedges. 6346 proven. 56175 refuted. 0 times theorem prover too weak. 2039204 trivial. 0 not checked. [2019-09-08 06:14:08,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:08,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2019-09-08 06:14:08,091 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:14:08,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:14:08,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:14:08,092 INFO L87 Difference]: Start difference. First operand 192 states and 312 transitions. Second operand 17 states. [2019-09-08 06:14:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:08,450 INFO L93 Difference]: Finished difference Result 201 states and 338 transitions. [2019-09-08 06:14:08,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 06:14:08,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 5883 [2019-09-08 06:14:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:08,461 INFO L225 Difference]: With dead ends: 201 [2019-09-08 06:14:08,461 INFO L226 Difference]: Without dead ends: 197 [2019-09-08 06:14:08,463 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5922 GetRequests, 5894 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:14:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-09-08 06:14:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2019-09-08 06:14:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-09-08 06:14:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 332 transitions. [2019-09-08 06:14:08,482 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 332 transitions. Word has length 5883 [2019-09-08 06:14:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:08,484 INFO L475 AbstractCegarLoop]: Abstraction has 197 states and 332 transitions. [2019-09-08 06:14:08,484 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:14:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 332 transitions. [2019-09-08 06:14:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10269 [2019-09-08 06:14:09,128 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:09,131 INFO L399 BasicCegarLoop]: trace histogram [1507, 1507, 1219, 753, 753, 753, 753, 753, 753, 753, 466, 288, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:09,132 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash -287649748, now seen corresponding path program 14 times [2019-09-08 06:14:09,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:09,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:09,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:09,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:09,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6413967 backedges. 10317 proven. 99549 refuted. 0 times theorem prover too weak. 6304101 trivial. 0 not checked. [2019-09-08 06:15:02,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:02,142 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:02,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:15:05,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:15:05,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:05,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 22799 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 06:15:05,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6413967 backedges. 10140 proven. 108332 refuted. 0 times theorem prover too weak. 6295495 trivial. 0 not checked. [2019-09-08 06:15:41,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:41,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2019-09-08 06:15:41,824 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:15:41,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:15:41,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:15:41,825 INFO L87 Difference]: Start difference. First operand 197 states and 332 transitions. Second operand 18 states. [2019-09-08 06:15:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:42,292 INFO L93 Difference]: Finished difference Result 206 states and 360 transitions. [2019-09-08 06:15:42,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:15:42,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 10268 [2019-09-08 06:15:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:42,305 INFO L225 Difference]: With dead ends: 206 [2019-09-08 06:15:42,305 INFO L226 Difference]: Without dead ends: 202 [2019-09-08 06:15:42,306 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10310 GetRequests, 10280 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2019-09-08 06:15:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-09-08 06:15:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2019-09-08 06:15:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-09-08 06:15:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 354 transitions. [2019-09-08 06:15:42,324 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 354 transitions. Word has length 10268 [2019-09-08 06:15:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:42,327 INFO L475 AbstractCegarLoop]: Abstraction has 202 states and 354 transitions. [2019-09-08 06:15:42,328 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:15:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 354 transitions. [2019-09-08 06:15:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15403 [2019-09-08 06:15:43,853 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:43,858 INFO L399 BasicCegarLoop]: trace histogram [2261, 2261, 1829, 1130, 1130, 1130, 1130, 1130, 1130, 1130, 699, 432, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:43,858 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash 683316975, now seen corresponding path program 15 times [2019-09-08 06:15:43,861 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:43,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:43,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:43,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:43,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14442966 backedges. 17510 proven. 160774 refuted. 0 times theorem prover too weak. 14264682 trivial. 0 not checked. [2019-09-08 06:17:49,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:49,872 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:49,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:17:50,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2019-09-08 06:17:50,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:50,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 06:17:51,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14442966 backedges. 16220 proven. 175039 refuted. 0 times theorem prover too weak. 14251707 trivial. 0 not checked. [2019-09-08 06:19:03,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:03,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 19 [2019-09-08 06:19:03,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:19:03,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:19:03,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:19:03,426 INFO L87 Difference]: Start difference. First operand 202 states and 354 transitions. Second operand 19 states. [2019-09-08 06:19:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:03,836 INFO L93 Difference]: Finished difference Result 211 states and 384 transitions. [2019-09-08 06:19:03,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:19:03,836 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15402 [2019-09-08 06:19:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:03,854 INFO L225 Difference]: With dead ends: 211 [2019-09-08 06:19:03,854 INFO L226 Difference]: Without dead ends: 207 [2019-09-08 06:19:03,855 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15447 GetRequests, 15415 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:19:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-09-08 06:19:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2019-09-08 06:19:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-09-08 06:19:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 378 transitions. [2019-09-08 06:19:03,872 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 378 transitions. Word has length 15402 [2019-09-08 06:19:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:03,875 INFO L475 AbstractCegarLoop]: Abstraction has 207 states and 378 transitions. [2019-09-08 06:19:03,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:19:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 378 transitions. [2019-09-08 06:19:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27700 [2019-09-08 06:19:08,499 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:08,506 INFO L399 BasicCegarLoop]: trace histogram [4067, 4067, 3290, 2033, 2033, 2033, 2033, 2033, 2033, 2033, 1257, 777, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:08,507 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:08,511 INFO L82 PathProgramCache]: Analyzing trace with hash 84450048, now seen corresponding path program 16 times [2019-09-08 06:19:08,511 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:08,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:08,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:08,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:08,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 46745361 backedges. 31687 proven. 313325 refuted. 0 times theorem prover too weak. 46400349 trivial. 0 not checked. [2019-09-08 06:26:17,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:17,760 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:17,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:26:25,011 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:26:25,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:26:25,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 49296 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-08 06:26:25,418 INFO L279 TraceCheckSpWp]: Computing forward predicates...