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-acceleration/array_true-unreach-call4_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:42:23,170 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:42:23,173 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:42:23,189 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:42:23,189 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:42:23,190 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:42:23,191 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:42:23,193 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:42:23,195 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:42:23,196 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:42:23,197 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:42:23,197 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:42:23,198 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:42:23,199 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:42:23,200 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:42:23,201 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:42:23,202 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:42:23,205 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:42:23,207 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:42:23,211 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:42:23,212 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:42:23,217 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:42:23,223 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:42:23,236 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:42:23,262 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:42:23,262 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:42:23,263 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:42:23,263 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:42:23,264 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:42:23,264 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:42:23,265 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:42:23,265 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:42:23,265 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:42:23,265 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:42:23,265 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:42:23,266 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:42:23,266 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:42:23,266 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:42:23,266 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:42:23,267 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:42:23,268 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:42:23,268 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:42:23,268 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:42:23,268 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:42:23,269 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:42:23,269 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:42:23,269 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:42:23,269 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:42:23,270 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:42:23,270 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:42:23,270 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:42:23,270 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:42:23,317 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:42:23,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:42:23,337 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:42:23,338 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:42:23,339 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:42:23,339 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i [2018-10-22 15:42:23,407 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5566a055f/67cf513a0f514386a7b1dba9cf843eb5/FLAG0506d601f [2018-10-22 15:42:23,897 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:42:23,898 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i [2018-10-22 15:42:23,907 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5566a055f/67cf513a0f514386a7b1dba9cf843eb5/FLAG0506d601f [2018-10-22 15:42:23,923 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5566a055f/67cf513a0f514386a7b1dba9cf843eb5 [2018-10-22 15:42:23,932 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:42:23,933 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:42:23,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:42:23,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:42:23,938 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:42:23,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:42:23" (1/1) ... [2018-10-22 15:42:23,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@619cc6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:23, skipping insertion in model container [2018-10-22 15:42:23,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:42:23" (1/1) ... [2018-10-22 15:42:23,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:42:23,971 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:42:24,171 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:42:24,176 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:42:24,200 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:42:24,226 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:42:24,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24 WrapperNode [2018-10-22 15:42:24,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:42:24,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:42:24,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:42:24,228 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:42:24,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... [2018-10-22 15:42:24,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... [2018-10-22 15:42:24,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:42:24,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:42:24,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:42:24,272 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:42:24,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... [2018-10-22 15:42:24,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... [2018-10-22 15:42:24,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... [2018-10-22 15:42:24,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... [2018-10-22 15:42:24,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... [2018-10-22 15:42:24,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... [2018-10-22 15:42:24,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... [2018-10-22 15:42:24,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:42:24,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:42:24,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:42:24,294 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:42:24,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:42:24,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-22 15:42:24,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:42:24,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:42:24,786 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:42:24,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:42:24 BoogieIcfgContainer [2018-10-22 15:42:24,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:42:24,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:42:24,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:42:24,791 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:42:24,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:42:23" (1/3) ... [2018-10-22 15:42:24,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d09523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:42:24, skipping insertion in model container [2018-10-22 15:42:24,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:42:24" (2/3) ... [2018-10-22 15:42:24,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d09523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:42:24, skipping insertion in model container [2018-10-22 15:42:24,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:42:24" (3/3) ... [2018-10-22 15:42:24,794 INFO L112 eAbstractionObserver]: Analyzing ICFG array_true-unreach-call4_true-termination.i [2018-10-22 15:42:24,804 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:42:24,812 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:42:24,830 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:42:24,863 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:42:24,863 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:42:24,864 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:42:24,864 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:42:24,864 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:42:24,864 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:42:24,864 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:42:24,864 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:42:24,865 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:42:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-22 15:42:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:42:24,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:24,886 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:24,888 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:24,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:24,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1760242803, now seen corresponding path program 1 times [2018-10-22 15:42:24,897 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:24,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:24,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:24,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:24,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:25,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:42:25,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:42:25,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:42:25,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:42:25,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:42:25,049 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-22 15:42:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:25,064 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-10-22 15:42:25,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:42:25,066 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-10-22 15:42:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:25,077 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:42:25,077 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:42:25,080 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 [2018-10-22 15:42:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:42:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:42:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:42:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-22 15:42:25,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2018-10-22 15:42:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:25,112 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-22 15:42:25,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:42:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-22 15:42:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:42:25,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:25,113 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:25,113 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:25,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash 559942139, now seen corresponding path program 1 times [2018-10-22 15:42:25,113 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:25,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:25,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:25,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:25,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:25,178 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:42:25,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:42:25,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:42:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:42:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:42:25,185 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2018-10-22 15:42:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:25,259 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-10-22 15:42:25,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:42:25,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-22 15:42:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:25,262 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:42:25,262 INFO L226 Difference]: Without dead ends: 28 [2018-10-22 15:42:25,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:42:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-22 15:42:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-22 15:42:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:42:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-22 15:42:25,268 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2018-10-22 15:42:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:25,268 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-22 15:42:25,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:42:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-22 15:42:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:42:25,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:25,269 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:25,270 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:25,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:25,270 INFO L82 PathProgramCache]: Analyzing trace with hash -57758920, now seen corresponding path program 1 times [2018-10-22 15:42:25,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:25,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:25,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:25,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:25,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:25,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:25,368 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:25,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:25,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:25,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:25,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-22 15:42:25,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:42:25,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:42:25,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:42:25,483 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2018-10-22 15:42:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:25,654 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-10-22 15:42:25,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:42:25,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-22 15:42:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:25,655 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:42:25,656 INFO L226 Difference]: Without dead ends: 40 [2018-10-22 15:42:25,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:42:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-22 15:42:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2018-10-22 15:42:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:42:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-22 15:42:25,664 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2018-10-22 15:42:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:25,665 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-22 15:42:25,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:42:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-22 15:42:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:42:25,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:25,666 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:25,666 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:25,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:25,667 INFO L82 PathProgramCache]: Analyzing trace with hash 309610523, now seen corresponding path program 2 times [2018-10-22 15:42:25,667 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:25,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:25,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:25,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:25,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:25,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:25,868 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:25,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:42:25,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-22 15:42:25,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:25,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:42:26,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:42:26,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-10-22 15:42:26,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:42:26,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:42:26,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:42:26,008 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2018-10-22 15:42:26,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:26,267 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-10-22 15:42:26,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:42:26,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-22 15:42:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:26,269 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:42:26,269 INFO L226 Difference]: Without dead ends: 40 [2018-10-22 15:42:26,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:42:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-22 15:42:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2018-10-22 15:42:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-22 15:42:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-22 15:42:26,276 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 21 [2018-10-22 15:42:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:26,276 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-22 15:42:26,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:42:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-22 15:42:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-22 15:42:26,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:26,278 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:26,278 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:26,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:26,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1620776846, now seen corresponding path program 1 times [2018-10-22 15:42:26,279 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:26,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:26,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:26,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:42:26,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:26,377 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:26,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:26,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:42:26,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:26,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-22 15:42:26,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:42:26,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:42:26,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:42:26,493 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 7 states. [2018-10-22 15:42:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:26,593 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-22 15:42:26,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:42:26,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2018-10-22 15:42:26,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:26,596 INFO L225 Difference]: With dead ends: 69 [2018-10-22 15:42:26,596 INFO L226 Difference]: Without dead ends: 52 [2018-10-22 15:42:26,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:42:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-22 15:42:26,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2018-10-22 15:42:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:42:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-22 15:42:26,604 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2018-10-22 15:42:26,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:26,604 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-22 15:42:26,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:42:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-22 15:42:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:42:26,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:26,606 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:26,606 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:26,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:26,607 INFO L82 PathProgramCache]: Analyzing trace with hash 813884079, now seen corresponding path program 2 times [2018-10-22 15:42:26,607 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:26,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:26,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:26,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:26,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:42:26,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:26,806 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:26,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:42:26,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:42:26,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:26,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:42:27,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:27,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-22 15:42:27,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:42:27,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:42:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:42:27,010 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 8 states. [2018-10-22 15:42:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:27,233 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-22 15:42:27,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:42:27,235 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-10-22 15:42:27,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:27,236 INFO L225 Difference]: With dead ends: 81 [2018-10-22 15:42:27,236 INFO L226 Difference]: Without dead ends: 64 [2018-10-22 15:42:27,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:42:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-22 15:42:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2018-10-22 15:42:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-22 15:42:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-22 15:42:27,244 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2018-10-22 15:42:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:27,244 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-22 15:42:27,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:42:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-22 15:42:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-22 15:42:27,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:27,246 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:27,246 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:27,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash -852965742, now seen corresponding path program 3 times [2018-10-22 15:42:27,247 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:27,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:27,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:27,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:27,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-22 15:42:27,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:27,385 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:27,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:42:27,455 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:42:27,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:27,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-22 15:42:27,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:27,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2018-10-22 15:42:27,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:42:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:42:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:42:27,641 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 10 states. [2018-10-22 15:42:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:28,163 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-10-22 15:42:28,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:42:28,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2018-10-22 15:42:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:28,165 INFO L225 Difference]: With dead ends: 87 [2018-10-22 15:42:28,165 INFO L226 Difference]: Without dead ends: 64 [2018-10-22 15:42:28,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:42:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-22 15:42:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-10-22 15:42:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-22 15:42:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-22 15:42:28,172 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 45 [2018-10-22 15:42:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:28,173 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-22 15:42:28,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:42:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-22 15:42:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-22 15:42:28,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:28,175 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:28,175 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:28,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:28,176 INFO L82 PathProgramCache]: Analyzing trace with hash -197540133, now seen corresponding path program 4 times [2018-10-22 15:42:28,176 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:28,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:28,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:28,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:28,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:28,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:28,394 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:28,404 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:42:28,463 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:42:28,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:28,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:28,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:28,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-22 15:42:28,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:42:28,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:42:28,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:42:28,616 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 10 states. [2018-10-22 15:42:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:28,862 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-22 15:42:28,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:42:28,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2018-10-22 15:42:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:28,865 INFO L225 Difference]: With dead ends: 102 [2018-10-22 15:42:28,865 INFO L226 Difference]: Without dead ends: 76 [2018-10-22 15:42:28,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:42:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-22 15:42:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2018-10-22 15:42:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 15:42:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-22 15:42:28,873 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2018-10-22 15:42:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:28,874 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-22 15:42:28,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:42:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-22 15:42:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:42:28,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:28,875 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:28,876 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:28,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:28,876 INFO L82 PathProgramCache]: Analyzing trace with hash -385082856, now seen corresponding path program 5 times [2018-10-22 15:42:28,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:28,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:28,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:28,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:28,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:29,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:29,031 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:29,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:42:29,096 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-22 15:42:29,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:29,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:29,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:29,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-22 15:42:29,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:42:29,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:42:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:42:29,154 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 11 states. [2018-10-22 15:42:29,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:29,274 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-22 15:42:29,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:42:29,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2018-10-22 15:42:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:29,276 INFO L225 Difference]: With dead ends: 114 [2018-10-22 15:42:29,276 INFO L226 Difference]: Without dead ends: 88 [2018-10-22 15:42:29,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:42:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-22 15:42:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2018-10-22 15:42:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-22 15:42:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-22 15:42:29,284 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2018-10-22 15:42:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:29,285 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-22 15:42:29,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:42:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-22 15:42:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-22 15:42:29,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:29,287 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:29,287 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:29,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash 835536123, now seen corresponding path program 6 times [2018-10-22 15:42:29,287 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:29,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:29,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:29,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:29,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:29,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:29,449 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:29,460 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:42:29,534 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-22 15:42:29,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:29,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:29,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:29,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-22 15:42:29,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:42:29,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:42:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:42:29,592 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 12 states. [2018-10-22 15:42:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:29,737 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-22 15:42:29,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:42:29,737 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2018-10-22 15:42:29,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:29,739 INFO L225 Difference]: With dead ends: 126 [2018-10-22 15:42:29,739 INFO L226 Difference]: Without dead ends: 100 [2018-10-22 15:42:29,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:42:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-22 15:42:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2018-10-22 15:42:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-22 15:42:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-22 15:42:29,748 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2018-10-22 15:42:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:29,748 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-22 15:42:29,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:42:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-22 15:42:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:42:29,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:29,750 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:29,750 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:29,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1754427384, now seen corresponding path program 7 times [2018-10-22 15:42:29,751 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:29,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:29,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:29,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:29,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:29,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:29,976 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:29,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:30,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:30,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:30,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-22 15:42:30,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:42:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:42:30,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:42:30,083 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 13 states. [2018-10-22 15:42:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:30,232 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-22 15:42:30,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:42:30,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2018-10-22 15:42:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:30,234 INFO L225 Difference]: With dead ends: 138 [2018-10-22 15:42:30,235 INFO L226 Difference]: Without dead ends: 112 [2018-10-22 15:42:30,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:42:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-22 15:42:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2018-10-22 15:42:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:42:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-22 15:42:30,245 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2018-10-22 15:42:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:30,245 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-22 15:42:30,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:42:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-22 15:42:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 15:42:30,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:30,247 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:30,247 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:30,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:30,248 INFO L82 PathProgramCache]: Analyzing trace with hash 3250971, now seen corresponding path program 8 times [2018-10-22 15:42:30,248 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:30,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:30,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:30,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:30,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:30,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:30,507 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:30,516 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:42:30,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:42:30,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:30,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:30,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:30,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-22 15:42:30,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:42:30,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:42:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:42:30,620 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 14 states. [2018-10-22 15:42:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:30,850 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-22 15:42:30,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:42:30,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2018-10-22 15:42:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:30,852 INFO L225 Difference]: With dead ends: 150 [2018-10-22 15:42:30,852 INFO L226 Difference]: Without dead ends: 124 [2018-10-22 15:42:30,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:42:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-22 15:42:30,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2018-10-22 15:42:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-22 15:42:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-22 15:42:30,858 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2018-10-22 15:42:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:30,859 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-22 15:42:30,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:42:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-22 15:42:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-22 15:42:30,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:30,860 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:30,860 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:30,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:30,861 INFO L82 PathProgramCache]: Analyzing trace with hash -267457064, now seen corresponding path program 9 times [2018-10-22 15:42:30,861 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:30,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:30,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:30,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:30,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-22 15:42:31,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:31,117 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:31,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:42:31,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-22 15:42:31,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:31,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-10-22 15:42:31,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:31,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 16 [2018-10-22 15:42:31,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:42:31,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:42:31,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:42:31,293 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 16 states. [2018-10-22 15:42:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:31,697 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2018-10-22 15:42:31,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:42:31,698 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84 [2018-10-22 15:42:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:31,699 INFO L225 Difference]: With dead ends: 150 [2018-10-22 15:42:31,699 INFO L226 Difference]: Without dead ends: 112 [2018-10-22 15:42:31,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:42:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-22 15:42:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2018-10-22 15:42:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-22 15:42:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-22 15:42:31,708 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 84 [2018-10-22 15:42:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:31,709 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-22 15:42:31,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:42:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-22 15:42:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-22 15:42:31,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:31,711 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:31,712 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:31,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:31,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1863306171, now seen corresponding path program 10 times [2018-10-22 15:42:31,712 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:31,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:31,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:31,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:31,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:32,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:32,863 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:32,878 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:42:32,944 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:42:32,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:32,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:33,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:33,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-22 15:42:33,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:42:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:42:33,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:42:33,010 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 16 states. [2018-10-22 15:42:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:33,166 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-22 15:42:33,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:42:33,166 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2018-10-22 15:42:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:33,168 INFO L225 Difference]: With dead ends: 168 [2018-10-22 15:42:33,168 INFO L226 Difference]: Without dead ends: 124 [2018-10-22 15:42:33,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:42:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-22 15:42:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2018-10-22 15:42:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-22 15:42:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-22 15:42:33,174 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 107 [2018-10-22 15:42:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:33,174 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-22 15:42:33,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:42:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-22 15:42:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-22 15:42:33,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:33,176 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:33,176 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:33,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:33,177 INFO L82 PathProgramCache]: Analyzing trace with hash 949604600, now seen corresponding path program 11 times [2018-10-22 15:42:33,177 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:33,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:33,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:33,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:33,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:33,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:33,571 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:33,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:42:33,661 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-22 15:42:33,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:33,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:33,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:33,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-22 15:42:33,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:42:33,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:42:33,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:42:33,724 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 17 states. [2018-10-22 15:42:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:33,861 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-10-22 15:42:33,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:42:33,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2018-10-22 15:42:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:33,863 INFO L225 Difference]: With dead ends: 180 [2018-10-22 15:42:33,863 INFO L226 Difference]: Without dead ends: 136 [2018-10-22 15:42:33,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:42:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-22 15:42:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2018-10-22 15:42:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:42:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-22 15:42:33,870 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 112 [2018-10-22 15:42:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:33,870 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-22 15:42:33,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:42:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-22 15:42:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-22 15:42:33,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:33,872 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:33,872 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:33,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash -979203621, now seen corresponding path program 12 times [2018-10-22 15:42:33,872 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:33,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:33,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:33,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:33,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:34,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:34,176 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:34,183 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:42:34,574 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-22 15:42:34,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:34,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:34,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:34,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-22 15:42:34,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:42:34,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:42:34,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:42:34,641 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 18 states. [2018-10-22 15:42:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:34,794 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2018-10-22 15:42:34,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:42:34,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 117 [2018-10-22 15:42:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:34,796 INFO L225 Difference]: With dead ends: 192 [2018-10-22 15:42:34,796 INFO L226 Difference]: Without dead ends: 148 [2018-10-22 15:42:34,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:42:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-22 15:42:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 123. [2018-10-22 15:42:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-22 15:42:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-22 15:42:34,804 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 117 [2018-10-22 15:42:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:34,808 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-22 15:42:34,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:42:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-22 15:42:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-22 15:42:34,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:34,809 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:34,809 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:34,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1666652456, now seen corresponding path program 13 times [2018-10-22 15:42:34,810 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:34,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:34,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:34,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:34,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:35,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:35,048 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:35,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:35,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:35,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:35,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-22 15:42:35,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:42:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:42:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:42:35,252 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 19 states. [2018-10-22 15:42:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:35,679 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-10-22 15:42:35,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:42:35,679 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 122 [2018-10-22 15:42:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:35,680 INFO L225 Difference]: With dead ends: 204 [2018-10-22 15:42:35,680 INFO L226 Difference]: Without dead ends: 160 [2018-10-22 15:42:35,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:42:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-22 15:42:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 128. [2018-10-22 15:42:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-22 15:42:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-10-22 15:42:35,685 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 122 [2018-10-22 15:42:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:35,686 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-10-22 15:42:35,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:42:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-10-22 15:42:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-22 15:42:35,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:35,687 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:35,688 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:35,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash -420077573, now seen corresponding path program 14 times [2018-10-22 15:42:35,688 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:35,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:35,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:35,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:35,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:36,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:36,577 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:36,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:42:36,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:42:36,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:36,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:36,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:36,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-22 15:42:36,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:42:36,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:42:36,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:42:36,705 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 20 states. [2018-10-22 15:42:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:36,913 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2018-10-22 15:42:36,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:42:36,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 127 [2018-10-22 15:42:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:36,916 INFO L225 Difference]: With dead ends: 216 [2018-10-22 15:42:36,916 INFO L226 Difference]: Without dead ends: 172 [2018-10-22 15:42:36,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:42:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-22 15:42:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 133. [2018-10-22 15:42:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-22 15:42:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-22 15:42:36,921 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 127 [2018-10-22 15:42:36,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:36,922 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-22 15:42:36,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:42:36,922 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-22 15:42:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-22 15:42:36,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:36,923 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:36,923 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:36,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:36,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2067913544, now seen corresponding path program 15 times [2018-10-22 15:42:36,924 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:36,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:36,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:36,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:36,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-22 15:42:37,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:37,279 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:37,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:42:37,495 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-22 15:42:37,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:37,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-22 15:42:37,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:37,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 22 [2018-10-22 15:42:37,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:42:37,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:42:37,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:42:37,594 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 22 states. [2018-10-22 15:42:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:37,922 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2018-10-22 15:42:37,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:42:37,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2018-10-22 15:42:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:37,924 INFO L225 Difference]: With dead ends: 216 [2018-10-22 15:42:37,925 INFO L226 Difference]: Without dead ends: 160 [2018-10-22 15:42:37,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:42:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-22 15:42:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2018-10-22 15:42:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-22 15:42:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-10-22 15:42:37,931 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 132 [2018-10-22 15:42:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:37,931 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-10-22 15:42:37,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:42:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-10-22 15:42:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-22 15:42:37,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:37,933 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:37,933 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:37,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash 467671195, now seen corresponding path program 16 times [2018-10-22 15:42:37,934 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:37,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:37,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:37,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:37,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:38,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:38,450 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:38,459 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:42:38,596 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:42:38,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:38,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:38,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:38,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-22 15:42:38,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:42:38,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:42:38,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:42:38,699 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 22 states. [2018-10-22 15:42:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:38,902 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2018-10-22 15:42:38,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:42:38,903 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 155 [2018-10-22 15:42:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:38,904 INFO L225 Difference]: With dead ends: 234 [2018-10-22 15:42:38,905 INFO L226 Difference]: Without dead ends: 172 [2018-10-22 15:42:38,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:42:38,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-22 15:42:38,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2018-10-22 15:42:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-22 15:42:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-22 15:42:38,910 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 155 [2018-10-22 15:42:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:38,910 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-22 15:42:38,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:42:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-22 15:42:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-22 15:42:38,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:38,912 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:38,912 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:38,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2100678616, now seen corresponding path program 17 times [2018-10-22 15:42:38,912 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:38,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:38,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:38,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:38,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:39,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:39,415 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:39,422 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:42:39,801 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-22 15:42:39,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:39,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:39,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:39,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-22 15:42:39,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:42:39,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:42:39,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:42:39,919 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 23 states. [2018-10-22 15:42:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:40,258 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2018-10-22 15:42:40,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:42:40,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2018-10-22 15:42:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:40,260 INFO L225 Difference]: With dead ends: 246 [2018-10-22 15:42:40,260 INFO L226 Difference]: Without dead ends: 184 [2018-10-22 15:42:40,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:42:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-22 15:42:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 166. [2018-10-22 15:42:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-22 15:42:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-10-22 15:42:40,266 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 160 [2018-10-22 15:42:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:40,266 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-10-22 15:42:40,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:42:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-10-22 15:42:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-22 15:42:40,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:40,267 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:40,267 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:40,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:40,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1475483323, now seen corresponding path program 18 times [2018-10-22 15:42:40,268 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:40,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:40,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:40,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:40,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:41,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:41,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:41,221 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:42:42,826 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-22 15:42:42,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:42,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:42,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:42,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-22 15:42:42,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:42:42,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:42:42,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:42:42,901 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 24 states. [2018-10-22 15:42:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:43,176 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2018-10-22 15:42:43,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:42:43,179 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 165 [2018-10-22 15:42:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:43,181 INFO L225 Difference]: With dead ends: 258 [2018-10-22 15:42:43,181 INFO L226 Difference]: Without dead ends: 196 [2018-10-22 15:42:43,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:42:43,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-22 15:42:43,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 171. [2018-10-22 15:42:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-22 15:42:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-22 15:42:43,188 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 165 [2018-10-22 15:42:43,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:43,188 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-22 15:42:43,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:42:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-22 15:42:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-22 15:42:43,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:43,189 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:43,189 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:43,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:43,190 INFO L82 PathProgramCache]: Analyzing trace with hash -917658184, now seen corresponding path program 19 times [2018-10-22 15:42:43,190 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:43,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:43,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:43,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:43,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:43,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:43,556 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:43,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:43,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:43,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:43,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-22 15:42:43,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:42:43,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:42:43,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:42:43,695 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 25 states. [2018-10-22 15:42:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:43,966 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2018-10-22 15:42:43,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:42:43,967 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 170 [2018-10-22 15:42:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:43,969 INFO L225 Difference]: With dead ends: 270 [2018-10-22 15:42:43,969 INFO L226 Difference]: Without dead ends: 208 [2018-10-22 15:42:43,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:42:43,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-22 15:42:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 176. [2018-10-22 15:42:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-22 15:42:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2018-10-22 15:42:43,974 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 170 [2018-10-22 15:42:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:43,975 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2018-10-22 15:42:43,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:42:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2018-10-22 15:42:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-22 15:42:43,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:43,976 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:43,976 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:43,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash -122360613, now seen corresponding path program 20 times [2018-10-22 15:42:43,977 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:43,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:43,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:43,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:43,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:44,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:44,513 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:44,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:42:44,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:42:44,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:44,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:44,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:44,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-22 15:42:44,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:42:44,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:42:44,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:42:44,684 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 26 states. [2018-10-22 15:42:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:45,547 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2018-10-22 15:42:45,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:42:45,548 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 175 [2018-10-22 15:42:45,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:45,550 INFO L225 Difference]: With dead ends: 282 [2018-10-22 15:42:45,550 INFO L226 Difference]: Without dead ends: 220 [2018-10-22 15:42:45,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:42:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-10-22 15:42:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 181. [2018-10-22 15:42:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-22 15:42:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-22 15:42:45,557 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 175 [2018-10-22 15:42:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:45,558 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-22 15:42:45,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:42:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-22 15:42:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-22 15:42:45,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:45,559 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:45,560 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:45,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1250188392, now seen corresponding path program 21 times [2018-10-22 15:42:45,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:45,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:45,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:45,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:45,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-22 15:42:46,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:46,102 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:46,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:42:47,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-22 15:42:47,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:47,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2018-10-22 15:42:47,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:47,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 28 [2018-10-22 15:42:47,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:42:47,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:42:47,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:42:47,582 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 28 states. [2018-10-22 15:42:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:49,184 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2018-10-22 15:42:49,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:42:49,184 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 180 [2018-10-22 15:42:49,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:49,186 INFO L225 Difference]: With dead ends: 282 [2018-10-22 15:42:49,186 INFO L226 Difference]: Without dead ends: 208 [2018-10-22 15:42:49,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=715, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:42:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-22 15:42:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-10-22 15:42:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-22 15:42:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-10-22 15:42:49,193 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 180 [2018-10-22 15:42:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:49,193 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-10-22 15:42:49,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:42:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-10-22 15:42:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-22 15:42:49,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:49,194 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:49,195 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:49,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1093184891, now seen corresponding path program 22 times [2018-10-22 15:42:49,195 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:49,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:49,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:49,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:49,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:42:50,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:50,472 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:50,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:42:50,871 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:42:50,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:50,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:42:50,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:50,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-22 15:42:50,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:42:50,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:42:50,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:42:50,942 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 28 states. [2018-10-22 15:42:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:51,883 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2018-10-22 15:42:51,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:42:51,883 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 203 [2018-10-22 15:42:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:51,885 INFO L225 Difference]: With dead ends: 300 [2018-10-22 15:42:51,885 INFO L226 Difference]: Without dead ends: 220 [2018-10-22 15:42:51,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:42:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-10-22 15:42:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 209. [2018-10-22 15:42:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-22 15:42:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-10-22 15:42:51,891 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 203 [2018-10-22 15:42:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:51,891 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-10-22 15:42:51,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:42:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-10-22 15:42:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-22 15:42:51,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:51,892 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:51,893 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:51,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:51,893 INFO L82 PathProgramCache]: Analyzing trace with hash 90052280, now seen corresponding path program 23 times [2018-10-22 15:42:51,893 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:51,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:51,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:51,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:51,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:42:52,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:52,961 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:52,973 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:42:53,537 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-22 15:42:53,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:53,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:42:53,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:53,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-22 15:42:53,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:42:53,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:42:53,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:42:53,700 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand 29 states. [2018-10-22 15:42:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:54,199 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2018-10-22 15:42:54,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:42:54,199 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 208 [2018-10-22 15:42:54,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:54,202 INFO L225 Difference]: With dead ends: 312 [2018-10-22 15:42:54,202 INFO L226 Difference]: Without dead ends: 232 [2018-10-22 15:42:54,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:42:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-10-22 15:42:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 214. [2018-10-22 15:42:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-22 15:42:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-10-22 15:42:54,207 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 208 [2018-10-22 15:42:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:54,207 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-10-22 15:42:54,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:42:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-10-22 15:42:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-22 15:42:54,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:54,209 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:54,209 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:54,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash 792325019, now seen corresponding path program 24 times [2018-10-22 15:42:54,209 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:54,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:54,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:54,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:54,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:42:56,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:56,540 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:42:56,554 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:43:00,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-22 15:43:00,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:00,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:43:00,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:00,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-22 15:43:00,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:43:00,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:43:00,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:43:00,817 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 30 states. [2018-10-22 15:43:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:01,246 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2018-10-22 15:43:01,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:43:01,247 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 213 [2018-10-22 15:43:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:01,248 INFO L225 Difference]: With dead ends: 324 [2018-10-22 15:43:01,248 INFO L226 Difference]: Without dead ends: 244 [2018-10-22 15:43:01,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:43:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-10-22 15:43:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 219. [2018-10-22 15:43:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-22 15:43:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-10-22 15:43:01,253 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 213 [2018-10-22 15:43:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:01,254 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-10-22 15:43:01,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:43:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-10-22 15:43:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-22 15:43:01,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:01,255 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:01,256 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:01,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1023323288, now seen corresponding path program 25 times [2018-10-22 15:43:01,256 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:01,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:01,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:01,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:01,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2685 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:43:02,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:02,505 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:02,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:02,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2685 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:43:02,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:02,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-22 15:43:02,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:43:02,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:43:02,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:43:02,676 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 31 states. [2018-10-22 15:43:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:02,960 INFO L93 Difference]: Finished difference Result 336 states and 338 transitions. [2018-10-22 15:43:02,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:43:02,960 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 218 [2018-10-22 15:43:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:02,962 INFO L225 Difference]: With dead ends: 336 [2018-10-22 15:43:02,962 INFO L226 Difference]: Without dead ends: 256 [2018-10-22 15:43:02,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:43:02,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-22 15:43:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 224. [2018-10-22 15:43:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-22 15:43:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2018-10-22 15:43:02,968 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 218 [2018-10-22 15:43:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:02,968 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2018-10-22 15:43:02,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:43:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2018-10-22 15:43:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-22 15:43:02,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:02,970 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:02,970 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:02,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2079064507, now seen corresponding path program 26 times [2018-10-22 15:43:02,971 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:02,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:02,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:02,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:02,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:43:03,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:03,482 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:03,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:43:03,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:43:03,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:03,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:43:03,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:03,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-22 15:43:03,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:43:03,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:43:03,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:43:03,732 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 32 states. [2018-10-22 15:43:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:04,090 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2018-10-22 15:43:04,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:43:04,091 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 223 [2018-10-22 15:43:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:04,093 INFO L225 Difference]: With dead ends: 348 [2018-10-22 15:43:04,093 INFO L226 Difference]: Without dead ends: 268 [2018-10-22 15:43:04,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:43:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-10-22 15:43:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 229. [2018-10-22 15:43:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-22 15:43:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2018-10-22 15:43:04,098 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 223 [2018-10-22 15:43:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:04,098 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2018-10-22 15:43:04,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:43:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2018-10-22 15:43:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-22 15:43:04,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:04,100 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:04,100 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:04,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:04,101 INFO L82 PathProgramCache]: Analyzing trace with hash -792368520, now seen corresponding path program 27 times [2018-10-22 15:43:04,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:04,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:04,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:04,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:04,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-22 15:43:04,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:04,599 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:04,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:43:07,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-22 15:43:07,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:07,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-10-22 15:43:07,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:07,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 34 [2018-10-22 15:43:07,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:43:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:43:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:43:07,928 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand 34 states. [2018-10-22 15:43:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:08,327 INFO L93 Difference]: Finished difference Result 348 states and 356 transitions. [2018-10-22 15:43:08,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:43:08,327 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 228 [2018-10-22 15:43:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:08,330 INFO L225 Difference]: With dead ends: 348 [2018-10-22 15:43:08,330 INFO L226 Difference]: Without dead ends: 256 [2018-10-22 15:43:08,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=584, Invalid=976, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:43:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-22 15:43:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2018-10-22 15:43:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-10-22 15:43:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-10-22 15:43:08,336 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 228 [2018-10-22 15:43:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:08,336 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-10-22 15:43:08,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:43:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-10-22 15:43:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-22 15:43:08,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:08,338 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:08,338 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:08,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:08,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1041790373, now seen corresponding path program 28 times [2018-10-22 15:43:08,339 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:08,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:08,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:08,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:08,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:43:09,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:09,271 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:09,278 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:43:09,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:43:09,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:09,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:43:09,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:09,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-22 15:43:09,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:43:09,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:43:09,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:43:09,856 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 34 states. [2018-10-22 15:43:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:10,172 INFO L93 Difference]: Finished difference Result 366 states and 368 transitions. [2018-10-22 15:43:10,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:43:10,172 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 251 [2018-10-22 15:43:10,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:10,174 INFO L225 Difference]: With dead ends: 366 [2018-10-22 15:43:10,174 INFO L226 Difference]: Without dead ends: 268 [2018-10-22 15:43:10,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:43:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-10-22 15:43:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 257. [2018-10-22 15:43:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-10-22 15:43:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2018-10-22 15:43:10,182 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 251 [2018-10-22 15:43:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:10,182 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2018-10-22 15:43:10,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:43:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2018-10-22 15:43:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-22 15:43:10,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:10,184 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:10,184 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:10,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:10,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1139759720, now seen corresponding path program 29 times [2018-10-22 15:43:10,185 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:10,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:10,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:10,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:10,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3752 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:43:10,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:10,788 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:10,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:43:11,991 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-22 15:43:11,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:11,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3752 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:43:12,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:12,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-22 15:43:12,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:43:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:43:12,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:43:12,098 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 35 states. [2018-10-22 15:43:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:12,473 INFO L93 Difference]: Finished difference Result 378 states and 380 transitions. [2018-10-22 15:43:12,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:43:12,473 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 256 [2018-10-22 15:43:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:12,476 INFO L225 Difference]: With dead ends: 378 [2018-10-22 15:43:12,476 INFO L226 Difference]: Without dead ends: 280 [2018-10-22 15:43:12,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:43:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-10-22 15:43:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 262. [2018-10-22 15:43:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-10-22 15:43:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-10-22 15:43:12,482 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 256 [2018-10-22 15:43:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:12,483 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-10-22 15:43:12,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:43:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-10-22 15:43:12,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-10-22 15:43:12,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:12,484 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:12,485 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:12,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash 779618427, now seen corresponding path program 30 times [2018-10-22 15:43:12,485 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:12,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:12,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:12,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:12,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3909 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-22 15:43:13,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:13,500 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:13,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:43:33,007 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-10-22 15:43:33,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:33,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3909 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2018-10-22 15:43:33,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:33,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 37 [2018-10-22 15:43:33,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:43:33,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:43:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:43:33,187 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 37 states. [2018-10-22 15:43:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:33,557 INFO L93 Difference]: Finished difference Result 384 states and 389 transitions. [2018-10-22 15:43:33,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:43:33,558 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 261 [2018-10-22 15:43:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:33,560 INFO L225 Difference]: With dead ends: 384 [2018-10-22 15:43:33,560 INFO L226 Difference]: Without dead ends: 280 [2018-10-22 15:43:33,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=650, Invalid=910, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:43:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-10-22 15:43:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2018-10-22 15:43:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-10-22 15:43:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2018-10-22 15:43:33,565 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 261 [2018-10-22 15:43:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:33,566 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2018-10-22 15:43:33,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:43:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2018-10-22 15:43:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-22 15:43:33,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:33,568 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:33,568 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:33,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1575822830, now seen corresponding path program 31 times [2018-10-22 15:43:33,568 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:33,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:33,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:33,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:33,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-22 15:43:34,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:34,949 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:34,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:35,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-22 15:43:35,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:35,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-22 15:43:35,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:43:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:43:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:43:35,252 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand 37 states. [2018-10-22 15:43:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:35,827 INFO L93 Difference]: Finished difference Result 399 states and 401 transitions. [2018-10-22 15:43:35,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:43:35,828 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 275 [2018-10-22 15:43:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:35,830 INFO L225 Difference]: With dead ends: 399 [2018-10-22 15:43:35,830 INFO L226 Difference]: Without dead ends: 292 [2018-10-22 15:43:35,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:43:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-22 15:43:35,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 281. [2018-10-22 15:43:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-10-22 15:43:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2018-10-22 15:43:35,836 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 275 [2018-10-22 15:43:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:35,837 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2018-10-22 15:43:35,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:43:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2018-10-22 15:43:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-22 15:43:35,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:35,839 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:35,839 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:35,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:35,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1998762417, now seen corresponding path program 32 times [2018-10-22 15:43:35,839 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:35,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:35,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:35,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:35,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-22 15:43:36,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:36,509 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:36,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:43:36,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:43:36,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:36,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-22 15:43:36,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:36,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-22 15:43:36,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:43:36,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:43:36,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:43:36,847 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand 38 states. [2018-10-22 15:43:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:37,856 INFO L93 Difference]: Finished difference Result 411 states and 413 transitions. [2018-10-22 15:43:37,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:43:37,856 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 280 [2018-10-22 15:43:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:37,858 INFO L225 Difference]: With dead ends: 411 [2018-10-22 15:43:37,858 INFO L226 Difference]: Without dead ends: 304 [2018-10-22 15:43:37,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:43:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-10-22 15:43:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2018-10-22 15:43:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-10-22 15:43:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2018-10-22 15:43:37,864 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 280 [2018-10-22 15:43:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:37,864 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2018-10-22 15:43:37,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:43:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2018-10-22 15:43:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-22 15:43:37,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:37,866 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:37,867 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:37,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:37,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1433208782, now seen corresponding path program 33 times [2018-10-22 15:43:37,867 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:37,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:37,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:37,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:37,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4695 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-22 15:43:38,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:38,972 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:38,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:43:52,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-22 15:43:52,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:52,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4695 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2018-10-22 15:43:53,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:53,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 40 [2018-10-22 15:43:53,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:43:53,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:43:53,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:43:53,382 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 40 states. [2018-10-22 15:43:53,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:53,795 INFO L93 Difference]: Finished difference Result 417 states and 422 transitions. [2018-10-22 15:43:53,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:43:53,795 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 285 [2018-10-22 15:43:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:53,797 INFO L225 Difference]: With dead ends: 417 [2018-10-22 15:43:53,797 INFO L226 Difference]: Without dead ends: 304 [2018-10-22 15:43:53,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=761, Invalid=1045, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:43:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-10-22 15:43:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2018-10-22 15:43:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-10-22 15:43:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 301 transitions. [2018-10-22 15:43:53,803 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 301 transitions. Word has length 285 [2018-10-22 15:43:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:53,803 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 301 transitions. [2018-10-22 15:43:53,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:43:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 301 transitions. [2018-10-22 15:43:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-10-22 15:43:53,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:53,805 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:53,805 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:53,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:53,805 INFO L82 PathProgramCache]: Analyzing trace with hash -40194245, now seen corresponding path program 34 times [2018-10-22 15:43:53,806 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:53,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:53,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:53,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:53,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:54,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:54,716 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:54,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:43:55,781 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:43:55,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:55,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:55,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:55,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-22 15:43:55,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:43:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:43:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:43:55,932 INFO L87 Difference]: Start difference. First operand 300 states and 301 transitions. Second operand 40 states. [2018-10-22 15:43:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:56,306 INFO L93 Difference]: Finished difference Result 432 states and 434 transitions. [2018-10-22 15:43:56,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:43:56,306 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 299 [2018-10-22 15:43:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:56,308 INFO L225 Difference]: With dead ends: 432 [2018-10-22 15:43:56,308 INFO L226 Difference]: Without dead ends: 316 [2018-10-22 15:43:56,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:43:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-10-22 15:43:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 305. [2018-10-22 15:43:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-22 15:43:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2018-10-22 15:43:56,314 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 299 [2018-10-22 15:43:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:56,315 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2018-10-22 15:43:56,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:43:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2018-10-22 15:43:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-22 15:43:56,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:56,317 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:56,317 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:56,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash 147553400, now seen corresponding path program 35 times [2018-10-22 15:43:56,317 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:56,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:56,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:56,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:56,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5366 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:57,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:57,177 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:57,185 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:43:58,907 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-10-22 15:43:58,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:58,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5366 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:43:59,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:59,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-22 15:43:59,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:43:59,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:43:59,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:43:59,066 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand 41 states. [2018-10-22 15:44:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:44:00,358 INFO L93 Difference]: Finished difference Result 444 states and 446 transitions. [2018-10-22 15:44:00,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:44:00,358 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 304 [2018-10-22 15:44:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:44:00,360 INFO L225 Difference]: With dead ends: 444 [2018-10-22 15:44:00,360 INFO L226 Difference]: Without dead ends: 328 [2018-10-22 15:44:00,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:44:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-10-22 15:44:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 310. [2018-10-22 15:44:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-10-22 15:44:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 311 transitions. [2018-10-22 15:44:00,367 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 311 transitions. Word has length 304 [2018-10-22 15:44:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:44:00,367 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 311 transitions. [2018-10-22 15:44:00,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:44:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 311 transitions. [2018-10-22 15:44:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-10-22 15:44:00,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:44:00,369 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:44:00,369 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:44:00,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:44:00,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1255510693, now seen corresponding path program 36 times [2018-10-22 15:44:00,370 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:44:00,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:44:00,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:00,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:44:00,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:44:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:44:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5553 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:44:01,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:44:01,293 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:44:01,300 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:45:02,647 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-22 15:45:02,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:02,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5553 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:45:02,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:02,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-22 15:45:02,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:45:02,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:45:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:45:02,781 INFO L87 Difference]: Start difference. First operand 310 states and 311 transitions. Second operand 42 states. [2018-10-22 15:45:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:03,224 INFO L93 Difference]: Finished difference Result 456 states and 458 transitions. [2018-10-22 15:45:03,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:45:03,224 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 309 [2018-10-22 15:45:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:03,226 INFO L225 Difference]: With dead ends: 456 [2018-10-22 15:45:03,226 INFO L226 Difference]: Without dead ends: 340 [2018-10-22 15:45:03,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:45:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-10-22 15:45:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 315. [2018-10-22 15:45:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-22 15:45:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-10-22 15:45:03,233 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 309 [2018-10-22 15:45:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:03,233 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-10-22 15:45:03,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:45:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-10-22 15:45:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-22 15:45:03,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:03,235 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:03,235 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:03,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:03,235 INFO L82 PathProgramCache]: Analyzing trace with hash 570266200, now seen corresponding path program 37 times [2018-10-22 15:45:03,236 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:03,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:03,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:03,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:03,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5745 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:45:04,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:04,769 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:45:04,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:04,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5745 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:45:04,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:04,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-22 15:45:04,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:45:04,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:45:04,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:45:04,985 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 43 states. [2018-10-22 15:45:05,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:05,414 INFO L93 Difference]: Finished difference Result 468 states and 470 transitions. [2018-10-22 15:45:05,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:45:05,415 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 314 [2018-10-22 15:45:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:05,416 INFO L225 Difference]: With dead ends: 468 [2018-10-22 15:45:05,416 INFO L226 Difference]: Without dead ends: 352 [2018-10-22 15:45:05,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:45:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-10-22 15:45:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 320. [2018-10-22 15:45:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-10-22 15:45:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 321 transitions. [2018-10-22 15:45:05,422 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 321 transitions. Word has length 314 [2018-10-22 15:45:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:05,422 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 321 transitions. [2018-10-22 15:45:05,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:45:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 321 transitions. [2018-10-22 15:45:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-22 15:45:05,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:05,424 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:05,424 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:05,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash -549780613, now seen corresponding path program 38 times [2018-10-22 15:45:05,425 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:05,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:05,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:05,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:45:05,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:45:07,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:07,381 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:45:07,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:45:07,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:45:07,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:07,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:45:07,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:07,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-22 15:45:07,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:45:07,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:45:07,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:45:07,732 INFO L87 Difference]: Start difference. First operand 320 states and 321 transitions. Second operand 44 states. [2018-10-22 15:45:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:08,561 INFO L93 Difference]: Finished difference Result 480 states and 482 transitions. [2018-10-22 15:45:08,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:45:08,561 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 319 [2018-10-22 15:45:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:08,563 INFO L225 Difference]: With dead ends: 480 [2018-10-22 15:45:08,563 INFO L226 Difference]: Without dead ends: 364 [2018-10-22 15:45:08,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:45:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2018-10-22 15:45:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 325. [2018-10-22 15:45:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-10-22 15:45:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2018-10-22 15:45:08,568 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 319 [2018-10-22 15:45:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:08,568 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2018-10-22 15:45:08,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:45:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2018-10-22 15:45:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-22 15:45:08,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:08,570 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:08,570 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:08,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:08,571 INFO L82 PathProgramCache]: Analyzing trace with hash -277491656, now seen corresponding path program 39 times [2018-10-22 15:45:08,571 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:08,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:08,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:08,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:08,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6144 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-22 15:45:09,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:09,993 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:45:10,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:45:34,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2018-10-22 15:45:34,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:34,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6144 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2018-10-22 15:45:34,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:34,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40] total 46 [2018-10-22 15:45:34,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:45:34,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:45:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:45:34,819 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 46 states. [2018-10-22 15:45:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:35,443 INFO L93 Difference]: Finished difference Result 480 states and 488 transitions. [2018-10-22 15:45:35,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:45:35,443 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 324 [2018-10-22 15:45:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:35,445 INFO L225 Difference]: With dead ends: 480 [2018-10-22 15:45:35,445 INFO L226 Difference]: Without dead ends: 352 [2018-10-22 15:45:35,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1046, Invalid=1606, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:45:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-10-22 15:45:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2018-10-22 15:45:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-10-22 15:45:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 349 transitions. [2018-10-22 15:45:35,452 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 349 transitions. Word has length 324 [2018-10-22 15:45:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:35,452 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 349 transitions. [2018-10-22 15:45:35,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:45:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 349 transitions. [2018-10-22 15:45:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-10-22 15:45:35,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:35,454 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:35,454 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:35,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:35,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1337975781, now seen corresponding path program 40 times [2018-10-22 15:45:35,455 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:35,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:35,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:35,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:35,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:45:36,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:36,507 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:45:36,515 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:45:37,512 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:45:37,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:37,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:45:37,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:37,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-22 15:45:37,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:45:37,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:45:37,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:45:37,662 INFO L87 Difference]: Start difference. First operand 348 states and 349 transitions. Second operand 46 states. [2018-10-22 15:45:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:38,081 INFO L93 Difference]: Finished difference Result 498 states and 500 transitions. [2018-10-22 15:45:38,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:45:38,082 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 347 [2018-10-22 15:45:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:38,084 INFO L225 Difference]: With dead ends: 498 [2018-10-22 15:45:38,084 INFO L226 Difference]: Without dead ends: 364 [2018-10-22 15:45:38,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:45:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2018-10-22 15:45:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 353. [2018-10-22 15:45:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2018-10-22 15:45:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 354 transitions. [2018-10-22 15:45:38,090 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 354 transitions. Word has length 347 [2018-10-22 15:45:38,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:38,090 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 354 transitions. [2018-10-22 15:45:38,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:45:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 354 transitions. [2018-10-22 15:45:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-10-22 15:45:38,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:38,092 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:38,093 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:38,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1349739688, now seen corresponding path program 41 times [2018-10-22 15:45:38,093 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:38,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:38,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:38,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:38,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7268 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:45:39,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:39,212 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:45:39,220 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:45:42,069 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2018-10-22 15:45:42,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:45:42,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:45:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7268 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:45:42,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:45:42,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-10-22 15:45:42,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:45:42,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:45:42,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:45:42,194 INFO L87 Difference]: Start difference. First operand 353 states and 354 transitions. Second operand 47 states. [2018-10-22 15:45:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:45:42,721 INFO L93 Difference]: Finished difference Result 510 states and 512 transitions. [2018-10-22 15:45:42,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:45:42,721 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 352 [2018-10-22 15:45:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:45:42,723 INFO L225 Difference]: With dead ends: 510 [2018-10-22 15:45:42,724 INFO L226 Difference]: Without dead ends: 376 [2018-10-22 15:45:42,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:45:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-10-22 15:45:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 358. [2018-10-22 15:45:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-10-22 15:45:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2018-10-22 15:45:42,728 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 352 [2018-10-22 15:45:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:45:42,728 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2018-10-22 15:45:42,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:45:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2018-10-22 15:45:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-10-22 15:45:42,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:45:42,730 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:45:42,730 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:45:42,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:45:42,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2135890491, now seen corresponding path program 42 times [2018-10-22 15:45:42,730 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:45:42,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:45:42,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:42,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:45:42,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:45:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:45:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7485 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-22 15:45:43,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:45:43,691 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:45:43,700 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown