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-new/count_by_k_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:50:45,493 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:50:45,496 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:50:45,509 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:50:45,510 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:50:45,511 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:50:45,512 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:50:45,514 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:50:45,516 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:50:45,517 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:50:45,517 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:50:45,518 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:50:45,519 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:50:45,520 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:50:45,521 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:50:45,522 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:50:45,523 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:50:45,524 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:50:45,526 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:50:45,528 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:50:45,529 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:50:45,531 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:50:45,533 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:50:45,548 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 15:50:45,580 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:50:45,580 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:50:45,581 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:50:45,581 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:50:45,582 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:50:45,582 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:50:45,582 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:50:45,582 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:50:45,584 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:50:45,584 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:50:45,584 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:50:45,584 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:50:45,584 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:50:45,585 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:50:45,585 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:50:45,585 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:50:45,585 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:50:45,585 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:50:45,586 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:50:45,586 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:50:45,586 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:50:45,586 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:50:45,586 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:50:45,587 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:50:45,587 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:50:45,587 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:50:45,587 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:50:45,587 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:50:45,652 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:50:45,670 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:50:45,675 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:50:45,677 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:50:45,677 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:50:45,678 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-10-22 15:50:45,741 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/32bfee9b0/189b1659240b460eba4c5092a8daa06a/FLAGf4dc9278f [2018-10-22 15:50:46,185 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:50:46,185 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-10-22 15:50:46,191 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/32bfee9b0/189b1659240b460eba4c5092a8daa06a/FLAGf4dc9278f [2018-10-22 15:50:46,209 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/32bfee9b0/189b1659240b460eba4c5092a8daa06a [2018-10-22 15:50:46,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:50:46,221 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:50:46,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:46,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:50:46,226 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:50:46,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d04e47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46, skipping insertion in model container [2018-10-22 15:50:46,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:50:46,267 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:50:46,460 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:46,466 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:50:46,487 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:46,507 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:50:46,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46 WrapperNode [2018-10-22 15:50:46,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:46,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:46,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:50:46,509 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:50:46,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:46,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:50:46,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:50:46,551 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:50:46,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (1/1) ... [2018-10-22 15:50:46,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:50:46,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:50:46,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:50:46,575 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:50:46,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (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 15:50:46,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:50:46,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:50:46,933 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:50:46,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:46 BoogieIcfgContainer [2018-10-22 15:50:46,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:50:46,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:50:46,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:50:46,938 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:50:46,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:50:46" (1/3) ... [2018-10-22 15:50:46,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bebaf72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:46, skipping insertion in model container [2018-10-22 15:50:46,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:46" (2/3) ... [2018-10-22 15:50:46,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bebaf72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:46, skipping insertion in model container [2018-10-22 15:50:46,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:46" (3/3) ... [2018-10-22 15:50:46,942 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k_true-unreach-call_true-termination.i [2018-10-22 15:50:46,952 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:50:46,959 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:50:46,977 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:50:47,011 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:50:47,012 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:50:47,013 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:50:47,013 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:50:47,013 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:50:47,013 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:50:47,013 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:50:47,013 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:50:47,013 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:50:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-22 15:50:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:50:47,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,033 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:47,035 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:47,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:47,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1807151048, now seen corresponding path program 1 times [2018-10-22 15:50:47,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:47,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:47,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:47,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:47,162 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 15:50:47,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:47,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:50:47,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:50:47,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:50:47,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:50:47,185 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-22 15:50:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:47,200 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-22 15:50:47,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:50:47,202 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-10-22 15:50:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:47,212 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:50:47,213 INFO L226 Difference]: Without dead ends: 10 [2018-10-22 15:50:47,216 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 15:50:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-22 15:50:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-22 15:50:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-22 15:50:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-22 15:50:47,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-22 15:50:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:47,254 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-22 15:50:47,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:50:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-22 15:50:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-22 15:50:47,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,255 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:47,255 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:47,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash 178554705, now seen corresponding path program 1 times [2018-10-22 15:50:47,256 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:47,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:47,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:47,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:47,460 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-22 15:50:47,740 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2018-10-22 15:50:47,761 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 15:50:47,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:47,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:50:47,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:50:47,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:50:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:50:47,764 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2018-10-22 15:50:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:47,900 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-22 15:50:47,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:50:47,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-22 15:50:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:47,903 INFO L225 Difference]: With dead ends: 16 [2018-10-22 15:50:47,903 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:50:47,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:50:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:50:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 15:50:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 15:50:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-22 15:50:47,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2018-10-22 15:50:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:47,912 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-22 15:50:47,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:50:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-22 15:50:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:50:47,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,915 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:47,915 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:47,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash -494066964, now seen corresponding path program 1 times [2018-10-22 15:50:47,916 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:47,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:47,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:47,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,007 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 15:50:48,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:48,009 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 15:50:48,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:48,251 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 15:50:48,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:48,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-22 15:50:48,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:50:48,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:50:48,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:50:48,275 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-10-22 15:50:48,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:48,529 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-22 15:50:48,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:50:48,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-22 15:50:48,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:48,530 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:50:48,531 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:50:48,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:50:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:50:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-22 15:50:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:50:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-22 15:50:48,536 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 11 [2018-10-22 15:50:48,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:48,536 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-22 15:50:48,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:50:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-22 15:50:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:50:48,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:48,537 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:48,538 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:48,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:48,538 INFO L82 PathProgramCache]: Analyzing trace with hash 211590033, now seen corresponding path program 2 times [2018-10-22 15:50:48,538 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:48,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:48,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:48,709 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 15:50:48,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:48,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:48,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:48,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:48,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-10-22 15:50:48,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:50:48,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:50:48,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:50:48,886 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2018-10-22 15:50:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:49,668 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-10-22 15:50:49,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:50:49,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-22 15:50:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:49,673 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:50:49,673 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:50:49,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:50:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:50:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-22 15:50:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-22 15:50:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-22 15:50:49,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 20 [2018-10-22 15:50:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:49,680 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-22 15:50:49,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:50:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-22 15:50:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 15:50:49,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:49,682 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:49,682 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:49,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:49,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1547039604, now seen corresponding path program 3 times [2018-10-22 15:50:49,682 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:49,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:49,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:49,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:49,930 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:50:49,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:49,969 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-22 15:50:49,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:49,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:50,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2018-10-22 15:50:50,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:50:50,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:50:50,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:50,098 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 13 states. [2018-10-22 15:50:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:50,555 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-10-22 15:50:50,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:50:50,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2018-10-22 15:50:50,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:50,558 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:50:50,558 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:50:50,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:50:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-22 15:50:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-22 15:50:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-22 15:50:50,566 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 29 [2018-10-22 15:50:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:50,566 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-22 15:50:50,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:50:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-22 15:50:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 15:50:50,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:50,568 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:50,568 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:50,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1958512113, now seen corresponding path program 4 times [2018-10-22 15:50:50,569 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:50,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:50,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:50,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:51,178 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 15:50:51,189 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:51,201 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:51,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:51,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:51,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-10-22 15:50:51,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:50:51,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:50:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:51,824 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 25 states. [2018-10-22 15:50:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:52,930 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-10-22 15:50:52,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:50:52,934 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-10-22 15:50:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:52,935 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:50:52,936 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 15:50:52,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 15:50:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-22 15:50:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-22 15:50:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-22 15:50:52,946 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2018-10-22 15:50:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:52,947 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-22 15:50:52,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:50:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-22 15:50:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 15:50:52,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:52,949 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:52,950 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:52,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:52,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1417949652, now seen corresponding path program 5 times [2018-10-22 15:50:52,950 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:52,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:52,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:52,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:53,255 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 15:50:53,271 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:53,301 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-22 15:50:53,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:53,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:53,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2018-10-22 15:50:53,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:50:53,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:50:53,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:53,429 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 19 states. [2018-10-22 15:50:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:54,235 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-10-22 15:50:54,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:50:54,236 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2018-10-22 15:50:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:54,238 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:50:54,238 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 15:50:54,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:50:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 15:50:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-22 15:50:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-22 15:50:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-22 15:50:54,248 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 47 [2018-10-22 15:50:54,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:54,249 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-22 15:50:54,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:50:54,249 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-22 15:50:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 15:50:54,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:54,251 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:54,251 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:54,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:54,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1873110959, now seen corresponding path program 6 times [2018-10-22 15:50:54,252 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:54,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:54,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:54,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:54,918 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 15:50:54,927 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:54,950 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-22 15:50:54,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:54,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:55,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2018-10-22 15:50:55,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:50:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:50:55,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:55,083 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 22 states. [2018-10-22 15:50:56,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:56,132 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2018-10-22 15:50:56,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:50:56,133 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2018-10-22 15:50:56,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:56,134 INFO L225 Difference]: With dead ends: 70 [2018-10-22 15:50:56,134 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:50:56,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=423, Invalid=1137, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:50:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:50:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-22 15:50:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-22 15:50:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-22 15:50:56,144 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 56 [2018-10-22 15:50:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:56,144 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-22 15:50:56,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:50:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-22 15:50:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-22 15:50:56,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:56,146 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:56,147 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:56,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181556, now seen corresponding path program 7 times [2018-10-22 15:50:56,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:56,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:56,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:56,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:56,587 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 15:50:56,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:56,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:56,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:56,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2018-10-22 15:50:56,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:50:56,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:50:56,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:56,760 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 25 states. [2018-10-22 15:50:56,940 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 8 [2018-10-22 15:50:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:58,150 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-10-22 15:50:58,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:50:58,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2018-10-22 15:50:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:58,152 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:50:58,153 INFO L226 Difference]: Without dead ends: 75 [2018-10-22 15:50:58,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:50:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-22 15:50:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-22 15:50:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-22 15:50:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-22 15:50:58,162 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 65 [2018-10-22 15:50:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:58,162 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-22 15:50:58,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:50:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-22 15:50:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-22 15:50:58,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:58,164 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:58,164 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:58,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:58,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1530712753, now seen corresponding path program 8 times [2018-10-22 15:50:58,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:58,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:58,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:58,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:58,594 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 15:50:58,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:58,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:58,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:58,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:58,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2018-10-22 15:50:58,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:50:58,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:50:58,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:50:58,940 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 28 states. [2018-10-22 15:50:59,344 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2018-10-22 15:51:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:00,717 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2018-10-22 15:51:00,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:51:00,718 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2018-10-22 15:51:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:00,719 INFO L225 Difference]: With dead ends: 88 [2018-10-22 15:51:00,719 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 15:51:00,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=705, Invalid=1947, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 15:51:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-22 15:51:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-22 15:51:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-22 15:51:00,729 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 74 [2018-10-22 15:51:00,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:00,730 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-22 15:51:00,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:51:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-22 15:51:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-22 15:51:00,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:00,731 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:00,732 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:00,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:00,732 INFO L82 PathProgramCache]: Analyzing trace with hash 430299500, now seen corresponding path program 9 times [2018-10-22 15:51:00,732 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:00,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:00,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:00,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:01,498 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 15:51:01,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:01,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-22 15:51:01,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:01,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:01,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2018-10-22 15:51:01,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:51:01,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:51:01,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:51:01,735 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 31 states. [2018-10-22 15:51:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:03,580 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2018-10-22 15:51:03,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:51:03,580 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 83 [2018-10-22 15:51:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:03,582 INFO L225 Difference]: With dead ends: 97 [2018-10-22 15:51:03,582 INFO L226 Difference]: Without dead ends: 93 [2018-10-22 15:51:03,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:51:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-22 15:51:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-22 15:51:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-22 15:51:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-22 15:51:03,592 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 83 [2018-10-22 15:51:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:03,593 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-22 15:51:03,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:51:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-22 15:51:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-22 15:51:03,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:03,595 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:03,595 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:03,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:03,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1414974191, now seen corresponding path program 10 times [2018-10-22 15:51:03,596 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:03,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:03,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:03,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:03,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:04,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:04,301 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 15:51:04,315 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:04,352 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:04,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:04,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:04,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:04,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2018-10-22 15:51:04,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:51:04,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:51:04,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:51:04,541 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 34 states. [2018-10-22 15:51:04,829 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 8 [2018-10-22 15:51:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:07,297 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2018-10-22 15:51:07,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:51:07,297 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2018-10-22 15:51:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:07,299 INFO L225 Difference]: With dead ends: 106 [2018-10-22 15:51:07,299 INFO L226 Difference]: Without dead ends: 102 [2018-10-22 15:51:07,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:51:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-22 15:51:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-22 15:51:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-22 15:51:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-22 15:51:07,309 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 92 [2018-10-22 15:51:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:07,309 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-22 15:51:07,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:51:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-22 15:51:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-22 15:51:07,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:07,311 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:07,311 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:07,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash 999432972, now seen corresponding path program 11 times [2018-10-22 15:51:07,312 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:07,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:07,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:07,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:08,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:08,419 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 15:51:08,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:08,503 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-22 15:51:08,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:08,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:08,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:08,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2018-10-22 15:51:08,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:51:08,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:51:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1256, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:08,702 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 37 states. [2018-10-22 15:51:09,993 WARN L179 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 11 [2018-10-22 15:51:12,004 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 11 [2018-10-22 15:51:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:12,326 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-10-22 15:51:12,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:51:12,326 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 101 [2018-10-22 15:51:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:12,328 INFO L225 Difference]: With dead ends: 115 [2018-10-22 15:51:12,328 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:51:12,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1263, Invalid=3567, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:51:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:51:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-22 15:51:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-22 15:51:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-22 15:51:12,339 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 101 [2018-10-22 15:51:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:12,339 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-22 15:51:12,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:51:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-22 15:51:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-22 15:51:12,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:12,341 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:12,342 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:12,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:12,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1838825615, now seen corresponding path program 12 times [2018-10-22 15:51:12,342 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:12,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:12,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:12,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:13,616 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 15:51:13,624 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:13,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-22 15:51:13,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:13,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:13,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2018-10-22 15:51:13,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:51:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:51:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:51:13,898 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 40 states. [2018-10-22 15:51:14,452 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 11 [2018-10-22 15:51:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:16,990 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-10-22 15:51:16,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:51:16,991 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 110 [2018-10-22 15:51:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:16,992 INFO L225 Difference]: With dead ends: 124 [2018-10-22 15:51:16,992 INFO L226 Difference]: Without dead ends: 120 [2018-10-22 15:51:16,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1485, Invalid=4215, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:51:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-22 15:51:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-22 15:51:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-22 15:51:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-22 15:51:17,002 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 110 [2018-10-22 15:51:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:17,002 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-22 15:51:17,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:51:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-22 15:51:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-22 15:51:17,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:17,004 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:17,005 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:17,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1524319404, now seen corresponding path program 13 times [2018-10-22 15:51:17,005 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:17,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:17,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:17,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:17,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:18,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:18,190 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 15:51:18,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:18,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:18,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:18,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2018-10-22 15:51:18,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:51:18,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:51:18,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1718, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:18,524 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 43 states. [2018-10-22 15:51:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:22,244 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2018-10-22 15:51:22,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:51:22,244 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 119 [2018-10-22 15:51:22,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:22,245 INFO L225 Difference]: With dead ends: 133 [2018-10-22 15:51:22,246 INFO L226 Difference]: Without dead ends: 129 [2018-10-22 15:51:22,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1725, Invalid=4917, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:51:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-22 15:51:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-22 15:51:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-22 15:51:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-22 15:51:22,255 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 119 [2018-10-22 15:51:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:22,256 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-22 15:51:22,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:51:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-22 15:51:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-22 15:51:22,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:22,257 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:22,258 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:22,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:22,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1162317359, now seen corresponding path program 14 times [2018-10-22 15:51:22,258 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:22,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:22,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:22,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:22,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:24,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:24,110 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 15:51:24,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:24,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:24,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:24,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:24,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:24,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2018-10-22 15:51:24,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:51:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:51:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:51:24,461 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 46 states. [2018-10-22 15:51:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:29,053 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2018-10-22 15:51:29,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:51:29,060 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 128 [2018-10-22 15:51:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:29,061 INFO L225 Difference]: With dead ends: 142 [2018-10-22 15:51:29,061 INFO L226 Difference]: Without dead ends: 138 [2018-10-22 15:51:29,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1983, Invalid=5673, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:51:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-22 15:51:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-22 15:51:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-22 15:51:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-22 15:51:29,071 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 128 [2018-10-22 15:51:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:29,071 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-22 15:51:29,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:51:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-22 15:51:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-22 15:51:29,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:29,073 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:29,073 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:29,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash 452673100, now seen corresponding path program 15 times [2018-10-22 15:51:29,074 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:29,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:29,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:29,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:29,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:30,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:30,399 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 15:51:30,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:30,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-10-22 15:51:30,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:30,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:30,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:30,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2018-10-22 15:51:30,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:51:30,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:51:30,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2252, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:30,664 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 49 states. [2018-10-22 15:51:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:35,711 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-10-22 15:51:35,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:51:35,711 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 137 [2018-10-22 15:51:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:35,713 INFO L225 Difference]: With dead ends: 151 [2018-10-22 15:51:35,713 INFO L226 Difference]: Without dead ends: 147 [2018-10-22 15:51:35,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2259, Invalid=6483, Unknown=0, NotChecked=0, Total=8742 [2018-10-22 15:51:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-22 15:51:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-22 15:51:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-22 15:51:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-22 15:51:35,724 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 137 [2018-10-22 15:51:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:35,724 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-22 15:51:35,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:51:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-22 15:51:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-22 15:51:35,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:35,725 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:35,725 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:35,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:35,726 INFO L82 PathProgramCache]: Analyzing trace with hash -899199951, now seen corresponding path program 16 times [2018-10-22 15:51:35,726 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:35,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:35,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:35,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:37,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:37,126 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 15:51:37,133 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:37,187 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:37,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:37,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:37,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:37,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 52 [2018-10-22 15:51:37,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:51:37,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:51:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:37,413 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 52 states. [2018-10-22 15:51:37,785 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-10-22 15:51:37,914 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-22 15:51:38,057 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-22 15:51:38,192 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-22 15:51:38,470 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-22 15:51:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:43,261 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2018-10-22 15:51:43,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:51:43,261 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 146 [2018-10-22 15:51:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:43,263 INFO L225 Difference]: With dead ends: 160 [2018-10-22 15:51:43,263 INFO L226 Difference]: Without dead ends: 156 [2018-10-22 15:51:43,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2553, Invalid=7347, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:51:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-22 15:51:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-22 15:51:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-22 15:51:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-22 15:51:43,271 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 146 [2018-10-22 15:51:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:43,272 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-22 15:51:43,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:51:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-22 15:51:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-22 15:51:43,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:43,273 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:43,273 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:43,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:43,274 INFO L82 PathProgramCache]: Analyzing trace with hash -185856020, now seen corresponding path program 17 times [2018-10-22 15:51:43,274 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:43,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:43,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:43,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:43,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:44,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:44,950 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 15:51:44,959 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:45,170 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-10-22 15:51:45,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:45,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:45,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:45,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2018-10-22 15:51:45,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-22 15:51:45,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-22 15:51:45,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2858, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:51:45,383 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 55 states. [2018-10-22 15:51:45,671 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 8 [2018-10-22 15:51:45,794 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2018-10-22 15:51:45,918 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:51:46,045 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-22 15:51:46,184 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:51:46,315 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-22 15:51:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:52,224 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2018-10-22 15:51:52,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:51:52,225 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 155 [2018-10-22 15:51:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:52,226 INFO L225 Difference]: With dead ends: 169 [2018-10-22 15:51:52,226 INFO L226 Difference]: Without dead ends: 165 [2018-10-22 15:51:52,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2865, Invalid=8265, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 15:51:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-22 15:51:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-22 15:51:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-22 15:51:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-22 15:51:52,234 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 155 [2018-10-22 15:51:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:52,234 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-22 15:51:52,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-22 15:51:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-22 15:51:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-22 15:51:52,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:52,235 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:52,235 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:52,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1044885871, now seen corresponding path program 18 times [2018-10-22 15:51:52,235 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:52,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:52,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:52,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:52,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:54,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:54,352 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 15:51:54,360 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:54,423 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2018-10-22 15:51:54,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:54,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:54,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:54,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 58 [2018-10-22 15:51:54,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-22 15:51:54,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-22 15:51:54,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:51:54,632 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 58 states. [2018-10-22 15:51:54,805 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 8 [2018-10-22 15:51:54,935 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-10-22 15:51:55,065 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-10-22 15:51:55,201 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:51:55,341 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:51:55,478 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:51:55,623 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:51:55,777 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-22 15:51:55,927 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:51:56,081 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-22 15:51:56,271 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-22 15:52:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:02,339 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2018-10-22 15:52:02,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:52:02,339 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 164 [2018-10-22 15:52:02,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:02,341 INFO L225 Difference]: With dead ends: 178 [2018-10-22 15:52:02,341 INFO L226 Difference]: Without dead ends: 174 [2018-10-22 15:52:02,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3195, Invalid=9237, Unknown=0, NotChecked=0, Total=12432 [2018-10-22 15:52:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-22 15:52:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-22 15:52:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-22 15:52:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-10-22 15:52:02,350 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 164 [2018-10-22 15:52:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:02,351 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-10-22 15:52:02,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-22 15:52:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-10-22 15:52:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-22 15:52:02,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:02,352 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:02,352 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:02,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:02,352 INFO L82 PathProgramCache]: Analyzing trace with hash -685262452, now seen corresponding path program 19 times [2018-10-22 15:52:02,353 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:02,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:02,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:02,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:02,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:04,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:04,515 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 15:52:04,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:04,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:05,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:05,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 61 [2018-10-22 15:52:05,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-22 15:52:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-22 15:52:05,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3536, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:52:05,187 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 61 states. [2018-10-22 15:52:05,389 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-10-22 15:52:05,521 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 8 [2018-10-22 15:52:05,665 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2018-10-22 15:52:05,806 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-22 15:52:05,962 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-22 15:52:06,110 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-22 15:52:06,274 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:52:06,436 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:52:06,598 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:52:06,759 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:52:06,929 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-22 15:52:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:14,147 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-10-22 15:52:14,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-22 15:52:14,147 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 173 [2018-10-22 15:52:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:14,148 INFO L225 Difference]: With dead ends: 187 [2018-10-22 15:52:14,148 INFO L226 Difference]: Without dead ends: 183 [2018-10-22 15:52:14,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3543, Invalid=10263, Unknown=0, NotChecked=0, Total=13806 [2018-10-22 15:52:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-22 15:52:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-22 15:52:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-22 15:52:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-22 15:52:14,157 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 173 [2018-10-22 15:52:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:14,158 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-22 15:52:14,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-22 15:52:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-22 15:52:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-22 15:52:14,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:14,159 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:14,159 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:14,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:14,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1534163185, now seen corresponding path program 20 times [2018-10-22 15:52:14,160 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:14,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:14,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:14,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:14,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:16,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:16,238 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 15:52:16,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:16,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:16,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:16,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:16,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:16,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 64 [2018-10-22 15:52:16,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-22 15:52:16,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-22 15:52:16,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3902, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:52:16,936 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 64 states. [2018-10-22 15:52:17,139 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 8 [2018-10-22 15:52:17,286 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-10-22 15:52:17,437 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-10-22 15:52:17,599 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-22 15:52:17,763 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-22 15:52:17,921 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-22 15:52:18,085 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-22 15:52:18,254 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-22 15:52:18,429 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-22 15:52:18,603 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:52:18,791 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:52:18,976 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:52:19,162 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:52:19,397 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-22 15:52:19,617 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:52:20,201 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-22 15:52:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:27,153 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-10-22 15:52:27,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-22 15:52:27,154 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 182 [2018-10-22 15:52:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:27,156 INFO L225 Difference]: With dead ends: 196 [2018-10-22 15:52:27,156 INFO L226 Difference]: Without dead ends: 192 [2018-10-22 15:52:27,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3909, Invalid=11343, Unknown=0, NotChecked=0, Total=15252 [2018-10-22 15:52:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-22 15:52:27,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-10-22 15:52:27,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-22 15:52:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-10-22 15:52:27,165 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 182 [2018-10-22 15:52:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:27,165 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-10-22 15:52:27,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-22 15:52:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-10-22 15:52:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-22 15:52:27,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:27,167 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:27,167 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:27,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash -978830548, now seen corresponding path program 21 times [2018-10-22 15:52:27,167 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:27,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:27,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:27,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:27,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:29,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:29,873 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:52:29,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:29,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2018-10-22 15:52:29,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:29,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:30,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:30,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 67 [2018-10-22 15:52:30,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-22 15:52:30,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-22 15:52:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4286, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:52:30,239 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 67 states. [2018-10-22 15:52:30,452 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-10-22 15:52:30,611 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2018-10-22 15:52:30,780 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 9 [2018-10-22 15:52:30,962 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-22 15:52:31,142 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-22 15:52:31,317 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-22 15:52:31,494 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-22 15:52:31,678 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-22 15:52:31,860 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-22 15:52:32,059 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-22 15:52:32,249 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-22 15:52:32,457 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-22 15:52:32,663 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:52:32,870 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:52:33,064 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:52:33,273 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:52:33,478 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-22 15:52:33,688 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:52:33,900 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-22 15:52:34,758 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-22 15:52:40,478 WARN L179 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2018-10-22 15:52:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:43,138 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2018-10-22 15:52:43,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-22 15:52:43,139 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 191 [2018-10-22 15:52:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:43,140 INFO L225 Difference]: With dead ends: 205 [2018-10-22 15:52:43,140 INFO L226 Difference]: Without dead ends: 201 [2018-10-22 15:52:43,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=4293, Invalid=12477, Unknown=0, NotChecked=0, Total=16770 [2018-10-22 15:52:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-22 15:52:43,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-22 15:52:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-22 15:52:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-22 15:52:43,147 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 191 [2018-10-22 15:52:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:43,148 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-22 15:52:43,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-22 15:52:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-22 15:52:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-22 15:52:43,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:43,149 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:43,149 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:43,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:43,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1826147153, now seen corresponding path program 22 times [2018-10-22 15:52:43,149 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:43,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:43,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:43,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:43,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:46,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:46,202 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 15:52:46,215 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:46,468 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:46,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:46,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:46,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:46,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2018-10-22 15:52:46,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-22 15:52:46,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-22 15:52:46,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4688, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:52:46,922 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 70 states. [2018-10-22 15:52:47,156 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 8 [2018-10-22 15:52:47,327 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-10-22 15:52:47,502 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-10-22 15:52:47,687 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-22 15:52:47,880 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-22 15:52:48,065 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-22 15:52:48,263 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-22 15:52:48,463 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-22 15:52:48,654 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-22 15:52:48,844 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-22 15:52:49,052 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-22 15:52:49,260 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-22 15:52:49,471 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-22 15:52:49,691 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-22 15:52:49,920 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-22 15:52:50,161 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:52:50,382 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:52:50,595 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:52:50,819 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:52:51,039 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-22 15:52:51,261 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:52:51,719 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-22 15:52:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:59,504 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2018-10-22 15:52:59,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-22 15:52:59,504 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 200 [2018-10-22 15:52:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:59,506 INFO L225 Difference]: With dead ends: 214 [2018-10-22 15:52:59,507 INFO L226 Difference]: Without dead ends: 210 [2018-10-22 15:52:59,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=4695, Invalid=13665, Unknown=0, NotChecked=0, Total=18360 [2018-10-22 15:52:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-22 15:52:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-10-22 15:52:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-22 15:52:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-10-22 15:52:59,515 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 200 [2018-10-22 15:52:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:59,516 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-10-22 15:52:59,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-22 15:52:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-10-22 15:52:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-22 15:52:59,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:59,517 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:59,517 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:59,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:59,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2045220044, now seen corresponding path program 23 times [2018-10-22 15:52:59,518 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:59,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:59,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:59,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:59,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:02,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:02,629 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 15:53:02,644 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:03,146 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2018-10-22 15:53:03,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:03,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:04,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:04,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2018-10-22 15:53:04,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-22 15:53:04,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-22 15:53:04,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5108, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:53:04,628 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 73 states. [2018-10-22 15:53:04,959 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-10-22 15:53:05,146 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 8 [2018-10-22 15:53:05,331 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2018-10-22 15:53:05,542 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-22 15:53:05,753 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-22 15:53:05,947 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-22 15:53:06,153 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-22 15:53:06,371 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-22 15:53:06,592 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-22 15:53:06,812 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-22 15:53:07,036 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-22 15:53:07,265 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-22 15:53:07,497 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-22 15:53:07,720 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-22 15:53:07,946 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-22 15:53:08,177 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-22 15:53:08,412 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-22 15:53:08,654 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-22 15:53:08,893 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:53:09,130 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:53:09,367 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:53:09,835 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-22 15:53:10,084 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:53:10,331 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-22 15:53:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:19,096 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-10-22 15:53:19,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-22 15:53:19,096 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 209 [2018-10-22 15:53:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:19,098 INFO L225 Difference]: With dead ends: 223 [2018-10-22 15:53:19,098 INFO L226 Difference]: Without dead ends: 219 [2018-10-22 15:53:19,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=5115, Invalid=14907, Unknown=0, NotChecked=0, Total=20022 [2018-10-22 15:53:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-22 15:53:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-22 15:53:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-22 15:53:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-22 15:53:19,108 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 209 [2018-10-22 15:53:19,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:19,109 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-22 15:53:19,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-22 15:53:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-22 15:53:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-22 15:53:19,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:19,110 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:19,111 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:19,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:19,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1169442225, now seen corresponding path program 24 times [2018-10-22 15:53:19,111 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:19,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:19,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:19,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:19,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:22,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:22,117 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:53:22,124 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:22,213 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2018-10-22 15:53:22,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:22,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:22,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:22,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2018-10-22 15:53:22,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-22 15:53:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-22 15:53:22,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5546, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:53:22,652 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 76 states. [2018-10-22 15:53:23,004 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 8 [2018-10-22 15:53:23,202 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-10-22 15:53:23,402 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-10-22 15:53:23,612 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-22 15:53:23,837 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-22 15:53:24,057 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-22 15:53:24,287 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-22 15:53:24,527 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-22 15:53:24,752 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-22 15:53:24,990 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-22 15:53:25,236 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-22 15:53:25,484 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-22 15:53:25,731 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-22 15:53:25,974 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-22 15:53:26,233 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-22 15:53:26,490 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-22 15:53:26,747 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-22 15:53:26,997 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-22 15:53:27,245 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-22 15:53:27,503 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-22 15:53:27,761 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-22 15:53:28,010 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:53:28,281 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:53:28,541 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:53:28,811 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:53:29,083 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-22 15:53:29,343 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:53:29,624 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-22 15:53:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:38,727 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2018-10-22 15:53:38,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-22 15:53:38,728 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 218 [2018-10-22 15:53:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:38,730 INFO L225 Difference]: With dead ends: 232 [2018-10-22 15:53:38,730 INFO L226 Difference]: Without dead ends: 228 [2018-10-22 15:53:38,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=5553, Invalid=16203, Unknown=0, NotChecked=0, Total=21756 [2018-10-22 15:53:38,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-22 15:53:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-22 15:53:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-22 15:53:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-10-22 15:53:38,739 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 218 [2018-10-22 15:53:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:38,740 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-10-22 15:53:38,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-22 15:53:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-10-22 15:53:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-22 15:53:38,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:38,741 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:38,742 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:38,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash 48219756, now seen corresponding path program 25 times [2018-10-22 15:53:38,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:38,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:38,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:38,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:38,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:41,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:41,850 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 15:53:41,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:42,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:43,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:43,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 79 [2018-10-22 15:53:43,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-22 15:53:43,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-22 15:53:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6002, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:53:43,145 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 79 states. [2018-10-22 15:53:43,415 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-10-22 15:53:43,630 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 8 [2018-10-22 15:53:43,848 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 9 [2018-10-22 15:53:44,074 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-22 15:53:44,303 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-22 15:53:44,531 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-22 15:53:44,767 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-22 15:53:45,013 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-22 15:53:45,247 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-22 15:53:45,493 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-22 15:53:45,756 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-22 15:53:46,015 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-22 15:53:46,269 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-22 15:53:46,543 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-22 15:53:46,812 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-22 15:53:47,071 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-22 15:53:47,353 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-22 15:53:47,637 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-22 15:53:47,919 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-22 15:53:48,196 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-22 15:53:48,471 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-22 15:53:48,753 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-22 15:53:49,030 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-22 15:53:49,307 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-22 15:53:49,574 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:53:49,846 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:53:50,126 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:53:50,410 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:53:50,692 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-22 15:53:50,975 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:53:51,276 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-22 15:54:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:00,798 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-10-22 15:54:00,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-22 15:54:00,798 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 227 [2018-10-22 15:54:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:00,801 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:54:00,801 INFO L226 Difference]: Without dead ends: 237 [2018-10-22 15:54:00,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=6009, Invalid=17553, Unknown=0, NotChecked=0, Total=23562 [2018-10-22 15:54:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-22 15:54:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-10-22 15:54:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-10-22 15:54:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-10-22 15:54:00,811 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 227 [2018-10-22 15:54:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:00,812 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-10-22 15:54:00,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-22 15:54:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-10-22 15:54:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-22 15:54:00,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:00,813 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:00,814 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:00,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:00,814 INFO L82 PathProgramCache]: Analyzing trace with hash 273278993, now seen corresponding path program 26 times [2018-10-22 15:54:00,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:00,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:00,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:00,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:00,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:04,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:04,346 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 15:54:04,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:54:05,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:54:05,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:05,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:05,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:05,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2018-10-22 15:54:05,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-22 15:54:05,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-22 15:54:05,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6476, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:54:05,850 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 82 states. [2018-10-22 15:54:06,145 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 8 [2018-10-22 15:54:06,367 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 8 [2018-10-22 15:54:06,595 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2018-10-22 15:54:06,830 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-22 15:54:07,086 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-22 15:54:07,322 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-22 15:54:07,582 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-22 15:54:07,837 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-22 15:54:08,097 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-22 15:54:08,363 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-22 15:54:08,688 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-22 15:54:08,955 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-22 15:54:09,237 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-22 15:54:09,517 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-22 15:54:09,799 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-22 15:54:10,087 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-22 15:54:10,377 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-22 15:54:10,669 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-22 15:54:10,967 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-22 15:54:11,267 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-22 15:54:11,562 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-22 15:54:11,849 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-22 15:54:12,145 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-22 15:54:12,446 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-22 15:54:12,749 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-22 15:54:13,054 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-22 15:54:13,351 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-22 15:54:13,653 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:54:13,958 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:54:14,249 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:54:14,546 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:54:15,332 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:54:15,647 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-22 15:54:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:25,609 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2018-10-22 15:54:25,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-22 15:54:25,610 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 236 [2018-10-22 15:54:25,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:25,612 INFO L225 Difference]: With dead ends: 250 [2018-10-22 15:54:25,612 INFO L226 Difference]: Without dead ends: 246 [2018-10-22 15:54:25,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=6483, Invalid=18957, Unknown=0, NotChecked=0, Total=25440 [2018-10-22 15:54:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-22 15:54:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-22 15:54:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-22 15:54:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2018-10-22 15:54:25,622 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 236 [2018-10-22 15:54:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:25,623 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2018-10-22 15:54:25,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-22 15:54:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2018-10-22 15:54:25,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-22 15:54:25,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:25,624 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:25,624 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:25,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:25,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1695207436, now seen corresponding path program 27 times [2018-10-22 15:54:25,625 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:25,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:25,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:25,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:25,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:30,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:30,464 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:54:30,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:54:30,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 80 check-sat command(s) [2018-10-22 15:54:30,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:30,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:31,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:31,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 85 [2018-10-22 15:54:31,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-22 15:54:31,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-22 15:54:31,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=6968, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:54:31,779 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand 85 states. [2018-10-22 15:54:32,095 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 8 [2018-10-22 15:54:32,330 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 8 [2018-10-22 15:54:32,572 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 9 [2018-10-22 15:54:32,812 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-22 15:54:33,069 WARN L179 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-22 15:54:33,327 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-22 15:54:33,591 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-22 15:54:33,863 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-22 15:54:34,148 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-22 15:54:34,427 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-22 15:54:34,718 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-22 15:54:35,004 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-22 15:54:35,295 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-22 15:54:35,589 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-22 15:54:35,887 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-22 15:54:36,172 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-22 15:54:36,467 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-22 15:54:36,772 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-22 15:54:37,090 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-22 15:54:37,393 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-22 15:54:37,697 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-22 15:54:38,001 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-22 15:54:38,320 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-22 15:54:38,627 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-22 15:54:38,927 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-22 15:54:39,245 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-22 15:54:39,575 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-22 15:54:39,893 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-22 15:54:40,203 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-22 15:54:40,524 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-22 15:54:40,833 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-22 15:54:41,139 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-22 15:54:41,459 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-22 15:54:41,768 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-22 15:54:42,406 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-22 15:54:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:52,970 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-10-22 15:54:52,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-22 15:54:52,970 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 245 [2018-10-22 15:54:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:52,973 INFO L225 Difference]: With dead ends: 259 [2018-10-22 15:54:52,973 INFO L226 Difference]: Without dead ends: 255 [2018-10-22 15:54:52,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=6975, Invalid=20415, Unknown=0, NotChecked=0, Total=27390 [2018-10-22 15:54:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-22 15:54:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-22 15:54:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-22 15:54:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-10-22 15:54:52,983 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 245 [2018-10-22 15:54:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:52,983 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-10-22 15:54:52,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-22 15:54:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-10-22 15:54:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-22 15:54:52,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:52,985 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:52,985 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:52,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash 828355185, now seen corresponding path program 28 times [2018-10-22 15:54:52,985 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:52,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:52,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:52,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:52,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-22 15:54:55,518 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:54:55,522 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:54:55,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:54:55 BoogieIcfgContainer [2018-10-22 15:54:55,522 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:54:55,523 INFO L168 Benchmark]: Toolchain (without parser) took 249303.32 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 663.7 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -665.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:55,524 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:55,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.45 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:55,524 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:55,525 INFO L168 Benchmark]: Boogie Preprocessor took 23.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:55,525 INFO L168 Benchmark]: RCFGBuilder took 359.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 733.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -793.3 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:55,525 INFO L168 Benchmark]: TraceAbstraction took 248587.67 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -69.2 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 117.3 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:55,527 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.45 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 359.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 733.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -793.3 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248587.67 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -69.2 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 117.3 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 255 with TraceHistMax 83,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 51 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. TIMEOUT Result, 248.5s OverallTime, 30 OverallIterations, 83 TraceHistogramMax, 186.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 273 SDtfs, 4086 SDslu, 4852 SDs, 0 SdLazy, 6340 SolverSat, 2545 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5747 GetRequests, 3424 SyntacticMatches, 0 SemanticMatches, 2323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31773 ImplicationChecksByTransitivity, 220.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=255occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 29 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 49.5s InterpolantComputationTime, 6927 NumberOfCodeBlocks, 6927 NumberOfCodeBlocksAsserted, 612 NumberOfCheckSat, 6871 ConstructedInterpolants, 0 QuantifiedInterpolants, 5566483 SizeOfPredicates, 54 NumberOfNonLiveVariables, 4806 ConjunctsInSsa, 1161 ConjunctsInUnsatCore, 56 InterpolantComputations, 2 PerfectInterpolantSequences, 0/174906 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown