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/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:27:42,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:27:42,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:27:42,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 06:27:42,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:27:42,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:27:42,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:27:42,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:27:42,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:27:42,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:27:42,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:27:42,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:27:42,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:27:42,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:27:42,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:27:42,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:27:42,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:27:42,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:27:42,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:27:42,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:27:42,357 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 06:27:42,377 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:27:42,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:27:42,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:27:42,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:27:42,379 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:27:42,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:27:42,379 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:27:42,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:27:42,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:27:42,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:27:42,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:27:42,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:27:42,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:27:42,381 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:27:42,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:27:42,381 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:27:42,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:27:42,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:27:42,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:27:42,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:27:42,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:27:42,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:27:42,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:27:42,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:27:42,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:27:42,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:27:42,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:27:42,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:27:42,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:27:42,414 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:27:42,427 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:27:42,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:27:42,432 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:27:42,432 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:27:42,433 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2019-09-08 06:27:42,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92eb3bfa8/3115d8acdef64006ba49cedb79ef33a9/FLAGf23f962dd [2019-09-08 06:27:42,908 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:27:42,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2019-09-08 06:27:42,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92eb3bfa8/3115d8acdef64006ba49cedb79ef33a9/FLAGf23f962dd [2019-09-08 06:27:43,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92eb3bfa8/3115d8acdef64006ba49cedb79ef33a9 [2019-09-08 06:27:43,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:27:43,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:27:43,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:43,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:27:43,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:27:43,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:43" (1/1) ... [2019-09-08 06:27:43,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f50e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43, skipping insertion in model container [2019-09-08 06:27:43,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:43" (1/1) ... [2019-09-08 06:27:43,326 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:27:43,345 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:27:43,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:43,568 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:27:43,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:43,605 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:27:43,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43 WrapperNode [2019-09-08 06:27:43,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:43,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:27:43,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:27:43,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:27:43,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43" (1/1) ... [2019-09-08 06:27:43,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43" (1/1) ... [2019-09-08 06:27:43,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43" (1/1) ... [2019-09-08 06:27:43,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43" (1/1) ... [2019-09-08 06:27:43,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43" (1/1) ... [2019-09-08 06:27:43,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43" (1/1) ... [2019-09-08 06:27:43,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43" (1/1) ... [2019-09-08 06:27:43,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:27:43,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:27:43,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:27:43,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:27:43,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43" (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 06:27:43,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:27:43,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:27:43,805 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-09-08 06:27:43,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:27:43,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:27:43,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:27:43,805 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-09-08 06:27:43,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:27:43,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:27:43,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:27:43,956 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:27:43,956 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:27:43,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:43 BoogieIcfgContainer [2019-09-08 06:27:43,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:27:43,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:27:43,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:27:43,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:27:43,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:27:43" (1/3) ... [2019-09-08 06:27:43,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ded0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:43, skipping insertion in model container [2019-09-08 06:27:43,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:43" (2/3) ... [2019-09-08 06:27:43,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ded0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:43, skipping insertion in model container [2019-09-08 06:27:43,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:43" (3/3) ... [2019-09-08 06:27:43,965 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2019-09-08 06:27:43,973 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:27:43,980 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:27:43,994 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:27:44,021 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:27:44,022 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:27:44,022 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:27:44,022 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:27:44,023 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:27:44,023 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:27:44,023 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:27:44,023 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:27:44,023 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:27:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-08 06:27:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:27:44,047 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:44,048 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:44,050 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2019-09-08 06:27:44,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:44,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:44,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:44,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:44,219 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 06:27:44,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:44,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:44,232 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:44,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:44,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:44,258 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-09-08 06:27:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:44,356 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-09-08 06:27:44,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:44,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:27:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:44,367 INFO L225 Difference]: With dead ends: 30 [2019-09-08 06:27:44,368 INFO L226 Difference]: Without dead ends: 18 [2019-09-08 06:27:44,371 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 06:27:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-08 06:27:44,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-08 06:27:44,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 06:27:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-08 06:27:44,407 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-08 06:27:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:44,407 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-08 06:27:44,407 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-08 06:27:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 06:27:44,409 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:44,410 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:44,410 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:44,411 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2019-09-08 06:27:44,411 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:44,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:44,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:44,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:27:44,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:44,488 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 06:27:44,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:44,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:27:44,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:27:44,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:44,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:27:44,584 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:27:44,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:27:44,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:27:44,586 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-09-08 06:27:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:44,673 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-09-08 06:27:44,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:27:44,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-08 06:27:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:44,676 INFO L225 Difference]: With dead ends: 25 [2019-09-08 06:27:44,676 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:27:44,678 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 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 06:27:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:27:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:27:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:27:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-08 06:27:44,691 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-08 06:27:44,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:44,693 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-08 06:27:44,693 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:27:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-08 06:27:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-08 06:27:44,694 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:44,694 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:44,695 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2019-09-08 06:27:44,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:44,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:44,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:44,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 06:27:44,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:44,818 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:44,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:44,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:44,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:44,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:27:44,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 06:27:44,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:44,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:27:44,916 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:27:44,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:27:44,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:27:44,917 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2019-09-08 06:27:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:45,001 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-09-08 06:27:45,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:27:45,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-09-08 06:27:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:45,003 INFO L225 Difference]: With dead ends: 28 [2019-09-08 06:27:45,003 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 06:27:45,004 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 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 06:27:45,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 06:27:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-08 06:27:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 06:27:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-08 06:27:45,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2019-09-08 06:27:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:45,011 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-08 06:27:45,012 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:27:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-08 06:27:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-08 06:27:45,013 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:45,013 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:45,014 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:45,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:45,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2019-09-08 06:27:45,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:45,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:45,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:45,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 06:27:45,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:45,125 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:45,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:27:45,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 06:27:45,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:45,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:27:45,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 06:27:45,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:45,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-09-08 06:27:45,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:27:45,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:27:45,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:27:45,220 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-09-08 06:27:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:45,308 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-09-08 06:27:45,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:27:45,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-09-08 06:27:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:45,310 INFO L225 Difference]: With dead ends: 31 [2019-09-08 06:27:45,311 INFO L226 Difference]: Without dead ends: 27 [2019-09-08 06:27:45,311 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:27:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-08 06:27:45,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-08 06:27:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 06:27:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-09-08 06:27:45,318 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2019-09-08 06:27:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:45,318 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-09-08 06:27:45,318 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:27:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-09-08 06:27:45,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 06:27:45,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:45,321 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:45,322 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:45,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:45,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2019-09-08 06:27:45,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:45,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:45,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:45,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 06:27:45,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:45,453 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 06:27:45,468 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:27:45,487 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:45,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:45,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:27:45,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 06:27:45,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:45,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-09-08 06:27:45,532 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:27:45,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:27:45,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:27:45,533 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2019-09-08 06:27:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:45,637 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2019-09-08 06:27:45,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 06:27:45,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-09-08 06:27:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:45,639 INFO L225 Difference]: With dead ends: 34 [2019-09-08 06:27:45,640 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:27:45,640 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:27:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:27:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:27:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-09-08 06:27:45,647 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2019-09-08 06:27:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:45,648 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-09-08 06:27:45,648 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:27:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-09-08 06:27:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 06:27:45,649 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:45,650 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:45,650 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:45,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2019-09-08 06:27:45,651 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:45,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:45,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:45,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 06:27:45,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:45,760 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:45,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:45,811 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-08 06:27:45,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:45,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:27:45,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 06:27:45,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:45,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-09-08 06:27:45,867 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:27:45,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:27:45,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:27:45,868 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2019-09-08 06:27:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:46,029 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-09-08 06:27:46,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:27:46,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2019-09-08 06:27:46,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:46,031 INFO L225 Difference]: With dead ends: 37 [2019-09-08 06:27:46,031 INFO L226 Difference]: Without dead ends: 33 [2019-09-08 06:27:46,032 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:27:46,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-08 06:27:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-08 06:27:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-08 06:27:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-09-08 06:27:46,039 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2019-09-08 06:27:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:46,040 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-09-08 06:27:46,040 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:27:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-09-08 06:27:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-08 06:27:46,044 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:46,045 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:46,045 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2019-09-08 06:27:46,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:46,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:46,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:46,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-08 06:27:46,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:46,221 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 06:27:46,241 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:27:46,276 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 06:27:46,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:46,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:27:46,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-08 06:27:46,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:46,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-09-08 06:27:46,331 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:27:46,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:27:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:27:46,333 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2019-09-08 06:27:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:46,456 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2019-09-08 06:27:46,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:27:46,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2019-09-08 06:27:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:46,458 INFO L225 Difference]: With dead ends: 40 [2019-09-08 06:27:46,458 INFO L226 Difference]: Without dead ends: 36 [2019-09-08 06:27:46,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 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 06:27:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-08 06:27:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-08 06:27:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 06:27:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-09-08 06:27:46,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2019-09-08 06:27:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:46,466 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-09-08 06:27:46,466 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:27:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-09-08 06:27:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-08 06:27:46,468 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:46,468 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:46,468 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:46,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:46,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2019-09-08 06:27:46,469 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:46,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:46,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:46,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-08 06:27:46,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:46,574 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:46,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:46,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:27:46,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-08 06:27:46,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:46,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-09-08 06:27:46,661 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:27:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:27:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:27:46,662 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2019-09-08 06:27:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:46,830 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-09-08 06:27:46,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:27:46,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2019-09-08 06:27:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:46,837 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:27:46,837 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:27:46,838 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 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 06:27:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:27:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:27:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:27:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-09-08 06:27:46,850 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2019-09-08 06:27:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:46,851 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-09-08 06:27:46,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:27:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-09-08 06:27:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-08 06:27:46,852 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:46,852 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:46,853 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2019-09-08 06:27:46,853 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:46,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:46,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:46,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-08 06:27:46,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:46,997 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 06:27:47,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:27:47,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:47,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:47,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:27:47,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-08 06:27:47,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:47,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2019-09-08 06:27:47,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:27:47,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:27:47,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:27:47,067 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2019-09-08 06:27:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:47,254 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2019-09-08 06:27:47,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:27:47,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-09-08 06:27:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:47,256 INFO L225 Difference]: With dead ends: 46 [2019-09-08 06:27:47,256 INFO L226 Difference]: Without dead ends: 42 [2019-09-08 06:27:47,257 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:27:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-08 06:27:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-08 06:27:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:27:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-09-08 06:27:47,263 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2019-09-08 06:27:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:47,264 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-09-08 06:27:47,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:27:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-09-08 06:27:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-08 06:27:47,265 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:47,265 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:47,266 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:47,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:47,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2019-09-08 06:27:47,266 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:47,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:47,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:47,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-09-08 06:27:47,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:47,392 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:47,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:27:47,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-08 06:27:47,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:47,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:27:47,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Stream closed [2019-09-08 06:27:47,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:47,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2019-09-08 06:27:47,480 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:27:47,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:27:47,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:47,481 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2019-09-08 06:27:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:47,679 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-09-08 06:27:47,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:27:47,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2019-09-08 06:27:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:47,681 INFO L225 Difference]: With dead ends: 49 [2019-09-08 06:27:47,681 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 06:27:47,682 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 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 06:27:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 06:27:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-08 06:27:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 06:27:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-09-08 06:27:47,697 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2019-09-08 06:27:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:47,701 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-09-08 06:27:47,701 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:27:47,701 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-09-08 06:27:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-08 06:27:47,703 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:47,703 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:47,704 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2019-09-08 06:27:47,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:47,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:47,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:47,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-08 06:27:47,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:47,888 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:47,899 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:27:47,929 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:47,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:47,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-08 06:27:47,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-08 06:27:47,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:47,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2019-09-08 06:27:47,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 06:27:47,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 06:27:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-09-08 06:27:47,996 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2019-09-08 06:27:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:48,205 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2019-09-08 06:27:48,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 06:27:48,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2019-09-08 06:27:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:48,208 INFO L225 Difference]: With dead ends: 52 [2019-09-08 06:27:48,208 INFO L226 Difference]: Without dead ends: 48 [2019-09-08 06:27:48,209 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:27:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-08 06:27:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-08 06:27:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 06:27:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-09-08 06:27:48,214 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2019-09-08 06:27:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:48,215 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-09-08 06:27:48,215 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 06:27:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-09-08 06:27:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 06:27:48,216 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:48,217 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:48,217 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:48,217 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2019-09-08 06:27:48,217 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:48,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:48,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:48,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-09-08 06:27:48,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:48,393 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 06:27:48,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:27:48,445 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-08 06:27:48,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:48,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-08 06:27:48,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-09-08 06:27:48,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:48,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2019-09-08 06:27:48,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:27:48,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:27:48,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:27:48,513 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2019-09-08 06:27:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:48,701 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2019-09-08 06:27:48,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:27:48,702 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2019-09-08 06:27:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:48,703 INFO L225 Difference]: With dead ends: 55 [2019-09-08 06:27:48,703 INFO L226 Difference]: Without dead ends: 51 [2019-09-08 06:27:48,704 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:27:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-08 06:27:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-08 06:27:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:27:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-09-08 06:27:48,710 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2019-09-08 06:27:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:48,711 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-09-08 06:27:48,711 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:27:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-09-08 06:27:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-08 06:27:48,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:48,712 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:48,713 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:48,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2019-09-08 06:27:48,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:48,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:48,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:48,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-09-08 06:27:48,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:48,920 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 06:27:48,934 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:27:48,973 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 06:27:48,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:48,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:27:48,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-09-08 06:27:49,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:49,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2019-09-08 06:27:49,023 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:27:49,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:27:49,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:27:49,024 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2019-09-08 06:27:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:49,277 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2019-09-08 06:27:49,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 06:27:49,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2019-09-08 06:27:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:49,279 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:27:49,279 INFO L226 Difference]: Without dead ends: 54 [2019-09-08 06:27:49,280 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:27:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-08 06:27:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-08 06:27:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:27:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-09-08 06:27:49,286 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2019-09-08 06:27:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:49,287 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-09-08 06:27:49,287 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:27:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-09-08 06:27:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-08 06:27:49,288 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:49,288 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:49,289 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2019-09-08 06:27:49,289 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:49,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:49,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:49,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:49,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-09-08 06:27:49,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:49,488 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 06:27:49,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:49,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 06:27:49,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:49,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:49,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2019-09-08 06:27:49,576 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:27:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:27:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:27:49,577 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2019-09-08 06:27:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:49,837 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2019-09-08 06:27:49,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:27:49,838 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-09-08 06:27:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:49,839 INFO L225 Difference]: With dead ends: 61 [2019-09-08 06:27:49,839 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 06:27:49,840 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2019-09-08 06:27:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 06:27:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-08 06:27:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:27:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-09-08 06:27:49,846 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2019-09-08 06:27:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:49,846 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-09-08 06:27:49,846 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:27:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-09-08 06:27:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-08 06:27:49,848 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:49,848 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:49,848 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2019-09-08 06:27:49,849 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:49,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:49,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:49,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:49,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-09-08 06:27:50,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:50,029 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 06:27:50,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:27:50,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:50,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:50,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 06:27:50,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-09-08 06:27:50,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:50,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2019-09-08 06:27:50,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:27:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:27:50,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:27:50,125 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2019-09-08 06:27:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:50,412 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2019-09-08 06:27:50,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:27:50,413 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2019-09-08 06:27:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:50,414 INFO L225 Difference]: With dead ends: 64 [2019-09-08 06:27:50,414 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 06:27:50,418 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:27:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 06:27:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-08 06:27:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:27:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2019-09-08 06:27:50,427 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2019-09-08 06:27:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:50,428 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2019-09-08 06:27:50,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:27:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2019-09-08 06:27:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-08 06:27:50,430 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:50,430 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:50,430 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:50,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2019-09-08 06:27:50,431 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:50,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:50,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:50,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:50,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-09-08 06:27:51,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:51,202 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 06:27:51,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:27:51,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-08 06:27:51,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:51,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-08 06:27:51,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (16)] Exception during sending of exit command (exit): Stream closed [2019-09-08 06:27:51,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:51,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2019-09-08 06:27:51,308 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 06:27:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 06:27:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 06:27:51,310 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2019-09-08 06:27:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:51,875 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2019-09-08 06:27:51,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-08 06:27:51,876 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2019-09-08 06:27:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:51,877 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:27:51,878 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 06:27:51,879 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 06:27:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 06:27:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-08 06:27:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:27:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2019-09-08 06:27:51,884 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2019-09-08 06:27:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:51,885 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2019-09-08 06:27:51,885 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 06:27:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2019-09-08 06:27:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-08 06:27:51,886 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:51,887 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:51,887 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2019-09-08 06:27:51,887 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:51,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:51,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:51,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:51,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 32 proven. 406 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2019-09-08 06:27:52,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:52,293 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 06:27:52,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:27:52,342 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:52,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:52,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-08 06:27:52,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-09-08 06:27:52,911 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-08 06:27:52,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 41 [2019-09-08 06:27:52,912 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-08 06:27:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-08 06:27:52,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 06:27:52,914 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 41 states. [2019-09-08 06:27:53,807 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-09-08 06:27:53,977 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2019-09-08 06:27:54,128 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-09-08 06:27:54,295 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2019-09-08 06:27:54,450 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-09-08 06:27:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:55,804 INFO L93 Difference]: Finished difference Result 151 states and 390 transitions. [2019-09-08 06:27:55,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-08 06:27:55,808 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 109 [2019-09-08 06:27:55,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:55,808 INFO L225 Difference]: With dead ends: 151 [2019-09-08 06:27:55,809 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:27:55,816 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1451, Invalid=3805, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 06:27:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:27:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:27:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:27:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:27:55,817 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2019-09-08 06:27:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:55,817 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:27:55,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-08 06:27:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:27:55,817 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:27:55,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:27:55,914 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:27:55,915 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:27:55,915 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:27:55,915 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:27:55,915 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:27:55,915 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:27:55,915 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2019-09-08 06:27:55,915 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2019-09-08 06:27:55,915 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-09-08 06:27:55,916 INFO L443 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-09-08 06:27:55,916 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-09-08 06:27:55,916 INFO L439 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 15) (<= 15 main_~input~0)) [2019-09-08 06:27:55,916 INFO L443 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-09-08 06:27:55,916 INFO L443 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2019-09-08 06:27:55,916 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-09-08 06:27:55,916 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-09-08 06:27:55,916 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-09-08 06:27:55,916 INFO L439 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (or (not (<= 0 |id_#in~x|)) (and (<= |id_#in~x| id_~x) (<= 1 |id_#in~x|) (<= id_~x |id_#in~x|))) [2019-09-08 06:27:55,916 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-09-08 06:27:55,917 INFO L443 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-09-08 06:27:55,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:27:55 BoogieIcfgContainer [2019-09-08 06:27:55,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:27:55,921 INFO L168 Benchmark]: Toolchain (without parser) took 12614.25 ms. Allocated memory was 145.8 MB in the beginning and 343.9 MB in the end (delta: 198.2 MB). Free memory was 94.0 MB in the beginning and 204.4 MB in the end (delta: -110.4 MB). Peak memory consumption was 87.8 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:55,921 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 111.9 MB in the beginning and 111.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:27:55,922 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.29 ms. Allocated memory is still 145.8 MB. Free memory was 93.7 MB in the beginning and 84.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:55,923 INFO L168 Benchmark]: Boogie Preprocessor took 31.74 ms. Allocated memory is still 145.8 MB. Free memory was 84.9 MB in the beginning and 83.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:55,923 INFO L168 Benchmark]: RCFGBuilder took 317.93 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 83.5 MB in the beginning and 170.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:55,924 INFO L168 Benchmark]: TraceAbstraction took 11960.68 ms. Allocated memory was 202.4 MB in the beginning and 343.9 MB in the end (delta: 141.6 MB). Free memory was 170.8 MB in the beginning and 204.4 MB in the end (delta: -33.6 MB). Peak memory consumption was 107.9 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:55,928 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 111.9 MB in the beginning and 111.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.29 ms. Allocated memory is still 145.8 MB. Free memory was 93.7 MB in the beginning and 84.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.74 ms. Allocated memory is still 145.8 MB. Free memory was 84.9 MB in the beginning and 83.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.93 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 83.5 MB in the beginning and 170.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11960.68 ms. Allocated memory was 202.4 MB in the beginning and 343.9 MB in the end (delta: 141.6 MB). Free memory was 170.8 MB in the beginning and 204.4 MB in the end (delta: -33.6 MB). Peak memory consumption was 107.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 11.9s OverallTime, 17 OverallIterations, 17 TraceHistogramMax, 6.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 284 SDtfs, 558 SDslu, 2697 SDs, 0 SdLazy, 2190 SolverSat, 664 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1546 GetRequests, 1171 SyntacticMatches, 1 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 37 PreInvPairs, 37 NumberOfFragments, 27 HoareAnnotationTreeSize, 37 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 226 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 445560 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2400 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5002/9248 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...