java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 09:39:13,408 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 09:39:13,411 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 09:39:13,424 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 09:39:13,425 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 09:39:13,427 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 09:39:13,428 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 09:39:13,431 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 09:39:13,433 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 09:39:13,434 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 09:39:13,443 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 09:39:13,443 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 09:39:13,445 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 09:39:13,447 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 09:39:13,450 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 09:39:13,451 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 09:39:13,452 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 09:39:13,456 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 09:39:13,458 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 09:39:13,463 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 09:39:13,465 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 09:39:13,467 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 09:39:13,469 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 09:39:13,485 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 09:39:13,504 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 09:39:13,504 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 09:39:13,505 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 09:39:13,505 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 09:39:13,506 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 09:39:13,506 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 09:39:13,506 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 09:39:13,507 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 09:39:13,507 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 09:39:13,507 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 09:39:13,507 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 09:39:13,507 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 09:39:13,508 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 09:39:13,508 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 09:39:13,508 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 09:39:13,508 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 09:39:13,509 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 09:39:13,509 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 09:39:13,509 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 09:39:13,509 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:39:13,509 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 09:39:13,510 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 09:39:13,511 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 09:39:13,511 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 09:39:13,511 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 09:39:13,511 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 09:39:13,512 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 09:39:13,512 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 09:39:13,565 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 09:39:13,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 09:39:13,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 09:39:13,588 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 09:39:13,589 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 09:39:13,590 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-23 09:39:13,652 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d9e9a6bde/3efc07897ba0446bb2b9d2b3417a8a32/FLAG438ca0229 [2018-10-23 09:39:14,069 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 09:39:14,069 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-23 09:39:14,075 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d9e9a6bde/3efc07897ba0446bb2b9d2b3417a8a32/FLAG438ca0229 [2018-10-23 09:39:14,088 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d9e9a6bde/3efc07897ba0446bb2b9d2b3417a8a32 [2018-10-23 09:39:14,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 09:39:14,100 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 09:39:14,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 09:39:14,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 09:39:14,105 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 09:39:14,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b58029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14, skipping insertion in model container [2018-10-23 09:39:14,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 09:39:14,139 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 09:39:14,334 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:39:14,338 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 09:39:14,358 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:39:14,372 INFO L193 MainTranslator]: Completed translation [2018-10-23 09:39:14,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14 WrapperNode [2018-10-23 09:39:14,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 09:39:14,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 09:39:14,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 09:39:14,374 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 09:39:14,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 09:39:14,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 09:39:14,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 09:39:14,408 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 09:39:14,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... [2018-10-23 09:39:14,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 09:39:14,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 09:39:14,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 09:39:14,429 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 09:39:14,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:39:14,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 09:39:14,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 09:39:14,809 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 09:39:14,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:39:14 BoogieIcfgContainer [2018-10-23 09:39:14,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 09:39:14,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 09:39:14,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 09:39:14,814 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 09:39:14,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:39:14" (1/3) ... [2018-10-23 09:39:14,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51331128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:39:14, skipping insertion in model container [2018-10-23 09:39:14,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:39:14" (2/3) ... [2018-10-23 09:39:14,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51331128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:39:14, skipping insertion in model container [2018-10-23 09:39:14,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:39:14" (3/3) ... [2018-10-23 09:39:14,818 INFO L112 eAbstractionObserver]: Analyzing ICFG string_concat-noarr_true-unreach-call_true-termination.i [2018-10-23 09:39:14,827 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 09:39:14,834 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 09:39:14,851 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 09:39:14,884 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 09:39:14,885 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 09:39:14,885 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 09:39:14,885 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 09:39:14,885 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 09:39:14,886 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 09:39:14,886 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 09:39:14,886 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 09:39:14,886 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 09:39:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-23 09:39:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-23 09:39:14,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:39:14,907 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:39:14,910 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:39:14,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:39:14,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1240807568, now seen corresponding path program 1 times [2018-10-23 09:39:14,918 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:39:14,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:39:14,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:14,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:39:14,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:39:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:15,024 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:39:15,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 09:39:15,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 09:39:15,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 09:39:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 09:39:15,048 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-23 09:39:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:39:15,066 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2018-10-23 09:39:15,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 09:39:15,067 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-10-23 09:39:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:39:15,076 INFO L225 Difference]: With dead ends: 32 [2018-10-23 09:39:15,077 INFO L226 Difference]: Without dead ends: 14 [2018-10-23 09:39:15,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 09:39:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-23 09:39:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-23 09:39:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 09:39:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-23 09:39:15,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-10-23 09:39:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:39:15,119 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-23 09:39:15,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 09:39:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-23 09:39:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 09:39:15,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:39:15,121 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:39:15,123 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:39:15,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:39:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash 525249980, now seen corresponding path program 1 times [2018-10-23 09:39:15,124 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:39:15,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:39:15,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:15,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:39:15,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:39:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:15,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:39:15,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 09:39:15,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 09:39:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 09:39:15,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 09:39:15,320 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2018-10-23 09:39:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:39:15,577 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-23 09:39:15,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 09:39:15,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-23 09:39:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:39:15,581 INFO L225 Difference]: With dead ends: 25 [2018-10-23 09:39:15,582 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 09:39:15,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 09:39:15,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 09:39:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-23 09:39:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-23 09:39:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-23 09:39:15,590 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2018-10-23 09:39:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:39:15,591 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-23 09:39:15,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 09:39:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-23 09:39:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 09:39:15,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:39:15,593 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:39:15,594 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:39:15,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:39:15,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1808282751, now seen corresponding path program 1 times [2018-10-23 09:39:15,595 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:39:15,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:39:15,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:15,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:39:15,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:39:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:15,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:39:15,683 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:39:15,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:39:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:39:15,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:39:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:15,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:39:15,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-23 09:39:15,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 09:39:15,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 09:39:15,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:39:15,874 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2018-10-23 09:39:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:39:16,314 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-10-23 09:39:16,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 09:39:16,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-23 09:39:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:39:16,319 INFO L225 Difference]: With dead ends: 50 [2018-10-23 09:39:16,319 INFO L226 Difference]: Without dead ends: 42 [2018-10-23 09:39:16,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:39:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-23 09:39:16,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2018-10-23 09:39:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-23 09:39:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-10-23 09:39:16,326 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 16 [2018-10-23 09:39:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:39:16,327 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-10-23 09:39:16,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 09:39:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-10-23 09:39:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 09:39:16,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:39:16,329 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:39:16,329 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:39:16,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:39:16,329 INFO L82 PathProgramCache]: Analyzing trace with hash 332243324, now seen corresponding path program 2 times [2018-10-23 09:39:16,330 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:39:16,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:39:16,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:16,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:39:16,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:39:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:16,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:39:16,522 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:39:16,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:39:16,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:39:16,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:39:16,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:39:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:16,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:39:16,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-10-23 09:39:16,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 09:39:16,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 09:39:16,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:39:16,794 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 13 states. [2018-10-23 09:39:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:39:18,048 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2018-10-23 09:39:18,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 09:39:18,048 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-23 09:39:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:39:18,050 INFO L225 Difference]: With dead ends: 116 [2018-10-23 09:39:18,051 INFO L226 Difference]: Without dead ends: 102 [2018-10-23 09:39:18,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:39:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-23 09:39:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2018-10-23 09:39:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-23 09:39:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2018-10-23 09:39:18,060 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 25 [2018-10-23 09:39:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:39:18,061 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2018-10-23 09:39:18,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 09:39:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2018-10-23 09:39:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-23 09:39:18,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:39:18,063 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:39:18,063 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:39:18,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:39:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash -122567908, now seen corresponding path program 3 times [2018-10-23 09:39:18,064 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:39:18,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:39:18,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:18,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:39:18,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:39:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:18,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:39:18,357 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:39:18,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:39:18,422 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-23 09:39:18,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:39:18,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:39:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:18,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:39:18,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-10-23 09:39:18,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 09:39:18,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 09:39:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:39:18,932 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 25 states. [2018-10-23 09:39:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:39:19,684 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2018-10-23 09:39:19,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-23 09:39:19,685 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2018-10-23 09:39:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:39:19,687 INFO L225 Difference]: With dead ends: 284 [2018-10-23 09:39:19,688 INFO L226 Difference]: Without dead ends: 258 [2018-10-23 09:39:19,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=458, Invalid=874, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:39:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-23 09:39:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 124. [2018-10-23 09:39:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-23 09:39:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2018-10-23 09:39:19,702 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 43 [2018-10-23 09:39:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:39:19,703 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2018-10-23 09:39:19,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 09:39:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2018-10-23 09:39:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-23 09:39:19,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:39:19,706 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:39:19,706 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:39:19,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:39:19,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1682403748, now seen corresponding path program 4 times [2018-10-23 09:39:19,707 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:39:19,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:39:19,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:19,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:39:19,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:39:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:20,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:39:20,451 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:39:20,466 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:39:20,537 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:39:20,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:39:20,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:39:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:21,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:39:21,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2018-10-23 09:39:21,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-23 09:39:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-23 09:39:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:39:21,752 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand 49 states. [2018-10-23 09:39:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:39:24,435 INFO L93 Difference]: Finished difference Result 782 states and 852 transitions. [2018-10-23 09:39:24,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-23 09:39:24,436 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 79 [2018-10-23 09:39:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:39:24,446 INFO L225 Difference]: With dead ends: 782 [2018-10-23 09:39:24,446 INFO L226 Difference]: Without dead ends: 732 [2018-10-23 09:39:24,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1778, Invalid=3478, Unknown=0, NotChecked=0, Total=5256 [2018-10-23 09:39:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2018-10-23 09:39:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 244. [2018-10-23 09:39:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-23 09:39:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 268 transitions. [2018-10-23 09:39:24,485 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 268 transitions. Word has length 79 [2018-10-23 09:39:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:39:24,486 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 268 transitions. [2018-10-23 09:39:24,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-23 09:39:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 268 transitions. [2018-10-23 09:39:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-23 09:39:24,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:39:24,490 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:39:24,490 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:39:24,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:39:24,490 INFO L82 PathProgramCache]: Analyzing trace with hash -224901924, now seen corresponding path program 5 times [2018-10-23 09:39:24,490 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:39:24,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:39:24,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:24,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:39:24,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:39:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:26,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:39:26,283 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:39:26,291 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:39:26,634 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2018-10-23 09:39:26,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:39:26,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:39:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:29,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:39:29,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 97 [2018-10-23 09:39:29,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-23 09:39:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-23 09:39:29,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2018-10-23 09:39:29,772 INFO L87 Difference]: Start difference. First operand 244 states and 268 transitions. Second operand 97 states. [2018-10-23 09:39:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:39:35,721 INFO L93 Difference]: Finished difference Result 2426 states and 2568 transitions. [2018-10-23 09:39:35,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-23 09:39:35,722 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 151 [2018-10-23 09:39:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:39:35,735 INFO L225 Difference]: With dead ends: 2426 [2018-10-23 09:39:35,735 INFO L226 Difference]: Without dead ends: 2328 [2018-10-23 09:39:35,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=7010, Invalid=13870, Unknown=0, NotChecked=0, Total=20880 [2018-10-23 09:39:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2018-10-23 09:39:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 484. [2018-10-23 09:39:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-10-23 09:39:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 532 transitions. [2018-10-23 09:39:35,778 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 532 transitions. Word has length 151 [2018-10-23 09:39:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:39:35,779 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 532 transitions. [2018-10-23 09:39:35,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-23 09:39:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 532 transitions. [2018-10-23 09:39:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-23 09:39:35,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:39:35,790 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:39:35,791 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:39:35,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:39:35,791 INFO L82 PathProgramCache]: Analyzing trace with hash -832556580, now seen corresponding path program 6 times [2018-10-23 09:39:35,791 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:39:35,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:39:35,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:35,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:39:35,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:39:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:39:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:39,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:39:39,705 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:39:39,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:39:40,198 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2018-10-23 09:39:40,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:39:40,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:39:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:39:50,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:39:50,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 193 [2018-10-23 09:39:50,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-10-23 09:39:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-10-23 09:39:50,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18338, Invalid=18718, Unknown=0, NotChecked=0, Total=37056 [2018-10-23 09:39:50,728 INFO L87 Difference]: Start difference. First operand 484 states and 532 transitions. Second operand 193 states. [2018-10-23 09:40:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:27,776 INFO L93 Difference]: Finished difference Result 8306 states and 8592 transitions. [2018-10-23 09:40:27,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2018-10-23 09:40:27,776 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 295 [2018-10-23 09:40:27,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:27,807 INFO L225 Difference]: With dead ends: 8306 [2018-10-23 09:40:27,807 INFO L226 Difference]: Without dead ends: 8112 [2018-10-23 09:40:27,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4843 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=27842, Invalid=55390, Unknown=0, NotChecked=0, Total=83232 [2018-10-23 09:40:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8112 states. [2018-10-23 09:40:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8112 to 964. [2018-10-23 09:40:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2018-10-23 09:40:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1060 transitions. [2018-10-23 09:40:27,863 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1060 transitions. Word has length 295 [2018-10-23 09:40:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:27,864 INFO L481 AbstractCegarLoop]: Abstraction has 964 states and 1060 transitions. [2018-10-23 09:40:27,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-10-23 09:40:27,864 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1060 transitions. [2018-10-23 09:40:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-10-23 09:40:27,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:27,877 INFO L375 BasicCegarLoop]: trace histogram [191, 191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:27,877 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:27,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:27,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1410468828, now seen corresponding path program 7 times [2018-10-23 09:40:27,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:27,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:27,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:27,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 54435 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:43,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:43,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [193] imperfect sequences [] total 193 [2018-10-23 09:40:43,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 193 states [2018-10-23 09:40:43,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2018-10-23 09:40:43,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-10-23 09:40:43,297 INFO L87 Difference]: Start difference. First operand 964 states and 1060 transitions. Second operand 193 states. [2018-10-23 09:40:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:45,717 INFO L93 Difference]: Finished difference Result 41829 states and 42015 transitions. [2018-10-23 09:40:45,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2018-10-23 09:40:45,717 INFO L78 Accepts]: Start accepts. Automaton has 193 states. Word has length 583 [2018-10-23 09:40:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:45,724 INFO L225 Difference]: With dead ends: 41829 [2018-10-23 09:40:45,724 INFO L226 Difference]: Without dead ends: 1786 [2018-10-23 09:40:45,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2018-10-23 09:40:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2018-10-23 09:40:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1770. [2018-10-23 09:40:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1770 states. [2018-10-23 09:40:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 1778 transitions. [2018-10-23 09:40:45,783 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 1778 transitions. Word has length 583 [2018-10-23 09:40:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:45,784 INFO L481 AbstractCegarLoop]: Abstraction has 1770 states and 1778 transitions. [2018-10-23 09:40:45,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 193 states. [2018-10-23 09:40:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 1778 transitions. [2018-10-23 09:40:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2018-10-23 09:40:45,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:45,799 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 92, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:45,799 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:45,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:45,800 INFO L82 PathProgramCache]: Analyzing trace with hash -895219466, now seen corresponding path program 1 times [2018-10-23 09:40:45,801 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:45,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:45,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:45,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:45,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 27408 backedges. 0 proven. 27408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:00,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:00,244 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:00,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:00,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 27408 backedges. 0 proven. 27408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:00,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:00,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 194 [2018-10-23 09:41:00,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-10-23 09:41:00,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-10-23 09:41:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2018-10-23 09:41:00,923 INFO L87 Difference]: Start difference. First operand 1770 states and 1778 transitions. Second operand 194 states. [2018-10-23 09:41:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:14,951 INFO L93 Difference]: Finished difference Result 3304 states and 3411 transitions. [2018-10-23 09:41:14,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2018-10-23 09:41:14,951 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 583 [2018-10-23 09:41:14,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:14,960 INFO L225 Difference]: With dead ends: 3304 [2018-10-23 09:41:14,960 INFO L226 Difference]: Without dead ends: 2999 [2018-10-23 09:41:14,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 583 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=18534, Invalid=19296, Unknown=0, NotChecked=0, Total=37830 [2018-10-23 09:41:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2018-10-23 09:41:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 1773. [2018-10-23 09:41:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1773 states. [2018-10-23 09:41:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 1781 transitions. [2018-10-23 09:41:14,993 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 1781 transitions. Word has length 583 [2018-10-23 09:41:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:14,994 INFO L481 AbstractCegarLoop]: Abstraction has 1773 states and 1781 transitions. [2018-10-23 09:41:14,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-10-23 09:41:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 1781 transitions. [2018-10-23 09:41:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-10-23 09:41:15,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:15,000 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 93, 93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:15,001 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:15,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash -582669855, now seen corresponding path program 2 times [2018-10-23 09:41:15,001 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:15,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:15,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:15,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:15,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 27684 backedges. 0 proven. 27684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:30,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:30,299 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:41:30,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:30,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:30,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:30,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 27684 backedges. 0 proven. 27684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:31,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:31,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [195, 195] total 195 [2018-10-23 09:41:31,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 195 states [2018-10-23 09:41:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2018-10-23 09:41:31,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18723, Invalid=19107, Unknown=0, NotChecked=0, Total=37830 [2018-10-23 09:41:31,134 INFO L87 Difference]: Start difference. First operand 1773 states and 1781 transitions. Second operand 195 states. [2018-10-23 09:41:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:49,450 INFO L93 Difference]: Finished difference Result 3028 states and 3135 transitions. [2018-10-23 09:41:49,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2018-10-23 09:41:49,451 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 586 [2018-10-23 09:41:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:49,461 INFO L225 Difference]: With dead ends: 3028 [2018-10-23 09:41:49,461 INFO L226 Difference]: Without dead ends: 2723 [2018-10-23 09:41:49,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=18727, Invalid=19493, Unknown=0, NotChecked=0, Total=38220 [2018-10-23 09:41:49,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2018-10-23 09:41:49,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 1776. [2018-10-23 09:41:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1776 states. [2018-10-23 09:41:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 1784 transitions. [2018-10-23 09:41:49,488 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 1784 transitions. Word has length 586 [2018-10-23 09:41:49,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:49,489 INFO L481 AbstractCegarLoop]: Abstraction has 1776 states and 1784 transitions. [2018-10-23 09:41:49,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 195 states. [2018-10-23 09:41:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 1784 transitions. [2018-10-23 09:41:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2018-10-23 09:41:49,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:49,496 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 94, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:49,496 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:49,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:49,496 INFO L82 PathProgramCache]: Analyzing trace with hash -906306282, now seen corresponding path program 3 times [2018-10-23 09:41:49,496 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:49,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:49,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:49,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:49,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27963 backedges. 0 proven. 27963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:04,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:04,338 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:04,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:04,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-23 09:42:04,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:04,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 27963 backedges. 0 proven. 27963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:05,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:05,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 196] total 196 [2018-10-23 09:42:05,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-10-23 09:42:05,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-10-23 09:42:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2018-10-23 09:42:05,321 INFO L87 Difference]: Start difference. First operand 1776 states and 1784 transitions. Second operand 196 states. [2018-10-23 09:42:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:17,129 INFO L93 Difference]: Finished difference Result 2749 states and 2856 transitions. [2018-10-23 09:42:17,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2018-10-23 09:42:17,129 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 589 [2018-10-23 09:42:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:17,140 INFO L225 Difference]: With dead ends: 2749 [2018-10-23 09:42:17,140 INFO L226 Difference]: Without dead ends: 2444 [2018-10-23 09:42:17,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 589 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=18921, Invalid=19691, Unknown=0, NotChecked=0, Total=38612 [2018-10-23 09:42:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2018-10-23 09:42:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1779. [2018-10-23 09:42:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1779 states. [2018-10-23 09:42:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 1787 transitions. [2018-10-23 09:42:17,166 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 1787 transitions. Word has length 589 [2018-10-23 09:42:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:17,166 INFO L481 AbstractCegarLoop]: Abstraction has 1779 states and 1787 transitions. [2018-10-23 09:42:17,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-10-23 09:42:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 1787 transitions. [2018-10-23 09:42:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2018-10-23 09:42:17,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:17,173 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 95, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:17,173 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:17,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash -157523519, now seen corresponding path program 4 times [2018-10-23 09:42:17,174 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:17,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:17,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:17,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:17,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 28245 backedges. 0 proven. 28245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:32,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:32,138 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:32,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:32,363 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:32,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:32,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 28245 backedges. 0 proven. 28245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:32,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:32,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 197] total 197 [2018-10-23 09:42:32,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-10-23 09:42:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-10-23 09:42:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19112, Invalid=19500, Unknown=0, NotChecked=0, Total=38612 [2018-10-23 09:42:32,785 INFO L87 Difference]: Start difference. First operand 1779 states and 1787 transitions. Second operand 197 states. [2018-10-23 09:42:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:48,420 INFO L93 Difference]: Finished difference Result 2467 states and 2574 transitions. [2018-10-23 09:42:48,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2018-10-23 09:42:48,420 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 592 [2018-10-23 09:42:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:48,427 INFO L225 Difference]: With dead ends: 2467 [2018-10-23 09:42:48,427 INFO L226 Difference]: Without dead ends: 2162 [2018-10-23 09:42:48,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=19116, Invalid=19890, Unknown=0, NotChecked=0, Total=39006 [2018-10-23 09:42:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2018-10-23 09:42:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1782. [2018-10-23 09:42:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2018-10-23 09:42:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 1790 transitions. [2018-10-23 09:42:48,449 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 1790 transitions. Word has length 592 [2018-10-23 09:42:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:48,450 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 1790 transitions. [2018-10-23 09:42:48,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-10-23 09:42:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 1790 transitions. [2018-10-23 09:42:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2018-10-23 09:42:48,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:48,456 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 96, 96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:48,457 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:48,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1230366410, now seen corresponding path program 5 times [2018-10-23 09:42:48,457 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:48,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:48,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:48,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:48,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 28530 backedges. 0 proven. 28530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:03,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:03,361 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:03,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:43:03,922 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 100 check-sat command(s) [2018-10-23 09:43:03,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:03,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 28530 backedges. 0 proven. 28530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:06,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:06,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198] total 198 [2018-10-23 09:43:06,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-10-23 09:43:06,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-10-23 09:43:06,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19308, Invalid=19698, Unknown=0, NotChecked=0, Total=39006 [2018-10-23 09:43:06,523 INFO L87 Difference]: Start difference. First operand 1782 states and 1790 transitions. Second operand 198 states. [2018-10-23 09:43:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:25,948 INFO L93 Difference]: Finished difference Result 2182 states and 2288 transitions. [2018-10-23 09:43:25,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-10-23 09:43:25,948 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 595 [2018-10-23 09:43:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:25,957 INFO L225 Difference]: With dead ends: 2182 [2018-10-23 09:43:25,957 INFO L226 Difference]: Without dead ends: 1877 [2018-10-23 09:43:25,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 595 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=19312, Invalid=20090, Unknown=0, NotChecked=0, Total=39402 [2018-10-23 09:43:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2018-10-23 09:43:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1493. [2018-10-23 09:43:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1493 states. [2018-10-23 09:43:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 1499 transitions. [2018-10-23 09:43:25,976 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 1499 transitions. Word has length 595 [2018-10-23 09:43:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:25,977 INFO L481 AbstractCegarLoop]: Abstraction has 1493 states and 1499 transitions. [2018-10-23 09:43:25,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-10-23 09:43:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 1499 transitions. [2018-10-23 09:43:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2018-10-23 09:43:25,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:25,983 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 99, 97, 97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:25,983 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:25,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:25,984 INFO L82 PathProgramCache]: Analyzing trace with hash 853684641, now seen corresponding path program 6 times [2018-10-23 09:43:25,984 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:25,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:25,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:25,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:25,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-23 09:43:26,911 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 09:43:26,915 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 09:43:26,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:43:26 BoogieIcfgContainer [2018-10-23 09:43:26,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 09:43:26,916 INFO L168 Benchmark]: Toolchain (without parser) took 252817.57 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-23 09:43:26,918 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:43:26,919 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-23 09:43:26,919 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.54 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:43:26,920 INFO L168 Benchmark]: Boogie Preprocessor took 21.07 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 09:43:26,920 INFO L168 Benchmark]: RCFGBuilder took 381.00 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -787.0 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-23 09:43:26,921 INFO L168 Benchmark]: TraceAbstraction took 252104.83 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 515.9 MB). Free memory was 2.2 GB in the beginning and 2.6 GB in the end (delta: -417.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-23 09:43:26,926 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 33.54 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.07 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 381.00 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -787.0 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 252104.83 ms. Allocated memory was 2.3 GB in the beginning and 2.8 GB in the end (delta: 515.9 MB). Free memory was 2.2 GB in the beginning and 2.6 GB in the end (delta: -417.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 599 with TraceHistMax 100,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 21 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. TIMEOUT Result, 252.0s OverallTime, 15 OverallIterations, 191 TraceHistogramMax, 130.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 522 SDtfs, 17595 SDslu, 6887 SDs, 0 SdLazy, 6536 SolverSat, 4045 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5118 GetRequests, 3377 SyntacticMatches, 11 SemanticMatches, 1730 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 125.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1782occurred in iteration=13, 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: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 13278 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 113.6s InterpolantComputationTime, 7713 NumberOfCodeBlocks, 7713 NumberOfCodeBlocksAsserted, 377 NumberOfCheckSat, 7688 ConstructedInterpolants, 0 QuantifiedInterpolants, 12038314 SizeOfPredicates, 33 NumberOfNonLiveVariables, 9578 ConjunctsInSsa, 1214 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 54435/369285 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown