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/eca-rers2012/Problem15_label50_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 19:25:46,412 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 19:25:46,416 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 19:25:46,436 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 19:25:46,437 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 19:25:46,438 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 19:25:46,439 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 19:25:46,441 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 19:25:46,442 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 19:25:46,443 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 19:25:46,444 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 19:25:46,444 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 19:25:46,445 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 19:25:46,446 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 19:25:46,447 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 19:25:46,448 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 19:25:46,449 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 19:25:46,451 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 19:25:46,453 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 19:25:46,455 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 19:25:46,456 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 19:25:46,458 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 19:25:46,461 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 19:25:46,461 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 19:25:46,461 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 19:25:46,463 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 19:25:46,464 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 19:25:46,465 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 19:25:46,466 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 19:25:46,467 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 19:25:46,468 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 19:25:46,468 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 19:25:46,469 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 19:25:46,469 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 19:25:46,470 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 19:25:46,471 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 19:25:46,472 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 [2018-10-26 19:25:46,497 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 19:25:46,498 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 19:25:46,499 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 19:25:46,499 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 19:25:46,500 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 19:25:46,501 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 19:25:46,501 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 19:25:46,501 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 19:25:46,502 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 19:25:46,502 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 19:25:46,502 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 19:25:46,502 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 19:25:46,503 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 19:25:46,503 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 19:25:46,504 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 19:25:46,504 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 19:25:46,504 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 19:25:46,504 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 19:25:46,504 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 19:25:46,505 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:25:46,505 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 19:25:46,505 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 19:25:46,505 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 19:25:46,505 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 19:25:46,506 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 19:25:46,507 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 19:25:46,507 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 19:25:46,508 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 19:25:46,581 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 19:25:46,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 19:25:46,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 19:25:46,605 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 19:25:46,606 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 19:25:46,607 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label50_false-unreach-call.c [2018-10-26 19:25:46,663 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fd223eccd/e59c619e746b4d8d8a2bda4fe39d580c/FLAG437202a54 [2018-10-26 19:25:47,317 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 19:25:47,317 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label50_false-unreach-call.c [2018-10-26 19:25:47,339 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fd223eccd/e59c619e746b4d8d8a2bda4fe39d580c/FLAG437202a54 [2018-10-26 19:25:47,358 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fd223eccd/e59c619e746b4d8d8a2bda4fe39d580c [2018-10-26 19:25:47,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 19:25:47,372 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 19:25:47,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 19:25:47,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 19:25:47,380 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 19:25:47,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:47" (1/1) ... [2018-10-26 19:25:47,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be7802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:47, skipping insertion in model container [2018-10-26 19:25:47,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:47" (1/1) ... [2018-10-26 19:25:47,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 19:25:47,491 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 19:25:48,266 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:25:48,271 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 19:25:48,582 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:25:48,604 INFO L193 MainTranslator]: Completed translation [2018-10-26 19:25:48,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48 WrapperNode [2018-10-26 19:25:48,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 19:25:48,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 19:25:48,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 19:25:48,606 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 19:25:48,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (1/1) ... [2018-10-26 19:25:48,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (1/1) ... [2018-10-26 19:25:48,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 19:25:48,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 19:25:48,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 19:25:48,990 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 19:25:49,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (1/1) ... [2018-10-26 19:25:49,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (1/1) ... [2018-10-26 19:25:49,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (1/1) ... [2018-10-26 19:25:49,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (1/1) ... [2018-10-26 19:25:49,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (1/1) ... [2018-10-26 19:25:49,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (1/1) ... [2018-10-26 19:25:49,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (1/1) ... [2018-10-26 19:25:49,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 19:25:49,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 19:25:49,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 19:25:49,214 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 19:25:49,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (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 [2018-10-26 19:25:49,292 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 19:25:49,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 19:25:49,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 19:25:55,921 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 19:25:55,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:55 BoogieIcfgContainer [2018-10-26 19:25:55,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 19:25:55,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 19:25:55,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 19:25:55,927 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 19:25:55,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:47" (1/3) ... [2018-10-26 19:25:55,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b25c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:55, skipping insertion in model container [2018-10-26 19:25:55,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:48" (2/3) ... [2018-10-26 19:25:55,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b25c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:55, skipping insertion in model container [2018-10-26 19:25:55,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:55" (3/3) ... [2018-10-26 19:25:55,931 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label50_false-unreach-call.c [2018-10-26 19:25:55,944 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 19:25:55,952 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 19:25:55,971 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 19:25:56,014 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 19:25:56,014 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 19:25:56,015 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 19:25:56,015 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 19:25:56,015 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 19:25:56,015 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 19:25:56,015 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 19:25:56,015 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 19:25:56,016 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 19:25:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-26 19:25:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 19:25:56,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:25:56,069 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:25:56,072 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:25:56,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:25:56,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1534999810, now seen corresponding path program 1 times [2018-10-26 19:25:56,080 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:25:56,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:25:56,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:25:56,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:25:56,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:25:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:25:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:25:56,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:25:56,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:25:56,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:25:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:25:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:25:56,450 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-26 19:26:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:04,427 INFO L93 Difference]: Finished difference Result 1461 states and 2710 transitions. [2018-10-26 19:26:04,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:26:04,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-26 19:26:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:04,459 INFO L225 Difference]: With dead ends: 1461 [2018-10-26 19:26:04,459 INFO L226 Difference]: Without dead ends: 1029 [2018-10-26 19:26:04,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2018-10-26 19:26:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 724. [2018-10-26 19:26:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-26 19:26:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1102 transitions. [2018-10-26 19:26:04,559 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1102 transitions. Word has length 13 [2018-10-26 19:26:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:04,560 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 1102 transitions. [2018-10-26 19:26:04,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:26:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1102 transitions. [2018-10-26 19:26:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-26 19:26:04,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:04,565 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:04,565 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:04,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -333126330, now seen corresponding path program 1 times [2018-10-26 19:26:04,566 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:04,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:04,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:04,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:04,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:26:04,868 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:04,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:26:04,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:26:04,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:26:04,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:04,871 INFO L87 Difference]: Start difference. First operand 724 states and 1102 transitions. Second operand 4 states. [2018-10-26 19:26:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:11,000 INFO L93 Difference]: Finished difference Result 2663 states and 4123 transitions. [2018-10-26 19:26:11,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:26:11,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2018-10-26 19:26:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:11,015 INFO L225 Difference]: With dead ends: 2663 [2018-10-26 19:26:11,015 INFO L226 Difference]: Without dead ends: 1941 [2018-10-26 19:26:11,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2018-10-26 19:26:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1937. [2018-10-26 19:26:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2018-10-26 19:26:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2684 transitions. [2018-10-26 19:26:11,103 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2684 transitions. Word has length 79 [2018-10-26 19:26:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:11,104 INFO L481 AbstractCegarLoop]: Abstraction has 1937 states and 2684 transitions. [2018-10-26 19:26:11,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:26:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2684 transitions. [2018-10-26 19:26:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-26 19:26:11,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:11,117 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:11,117 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:11,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:11,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1522522951, now seen corresponding path program 1 times [2018-10-26 19:26:11,118 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:11,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:11,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:11,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:11,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-26 19:26:11,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:26:11,713 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 [2018-10-26 19:26:11,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:11,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:26:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:26:12,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:26:12,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-26 19:26:12,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:26:12,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:26:12,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:12,112 INFO L87 Difference]: Start difference. First operand 1937 states and 2684 transitions. Second operand 4 states. [2018-10-26 19:26:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:20,806 INFO L93 Difference]: Finished difference Result 6939 states and 9819 transitions. [2018-10-26 19:26:20,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:26:20,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2018-10-26 19:26:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:20,836 INFO L225 Difference]: With dead ends: 6939 [2018-10-26 19:26:20,836 INFO L226 Difference]: Without dead ends: 5004 [2018-10-26 19:26:20,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2018-10-26 19:26:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 2838. [2018-10-26 19:26:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2838 states. [2018-10-26 19:26:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 3816 transitions. [2018-10-26 19:26:20,921 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 3816 transitions. Word has length 225 [2018-10-26 19:26:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:20,924 INFO L481 AbstractCegarLoop]: Abstraction has 2838 states and 3816 transitions. [2018-10-26 19:26:20,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:26:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 3816 transitions. [2018-10-26 19:26:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-26 19:26:20,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:20,933 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:20,933 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:20,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:20,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1243449501, now seen corresponding path program 1 times [2018-10-26 19:26:20,934 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:20,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:20,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:20,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:20,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:21,699 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-26 19:26:22,055 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-26 19:26:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-26 19:26:22,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:22,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:26:22,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:26:22,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:26:22,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:26:22,424 INFO L87 Difference]: Start difference. First operand 2838 states and 3816 transitions. Second operand 5 states. [2018-10-26 19:26:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:29,038 INFO L93 Difference]: Finished difference Result 6876 states and 8952 transitions. [2018-10-26 19:26:29,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:26:29,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 293 [2018-10-26 19:26:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:29,058 INFO L225 Difference]: With dead ends: 6876 [2018-10-26 19:26:29,058 INFO L226 Difference]: Without dead ends: 4040 [2018-10-26 19:26:29,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:26:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2018-10-26 19:26:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 3739. [2018-10-26 19:26:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3739 states. [2018-10-26 19:26:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 4777 transitions. [2018-10-26 19:26:29,131 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 4777 transitions. Word has length 293 [2018-10-26 19:26:29,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:29,132 INFO L481 AbstractCegarLoop]: Abstraction has 3739 states and 4777 transitions. [2018-10-26 19:26:29,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:26:29,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 4777 transitions. [2018-10-26 19:26:29,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-10-26 19:26:29,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:29,140 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:29,141 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:29,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:29,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1902589867, now seen corresponding path program 1 times [2018-10-26 19:26:29,141 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:29,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:29,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:29,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:29,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:26:29,653 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:26:29,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:26:29,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:26:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:26:29,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:29,654 INFO L87 Difference]: Start difference. First operand 3739 states and 4777 transitions. Second operand 4 states. [2018-10-26 19:26:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:26:36,211 INFO L93 Difference]: Finished difference Result 9287 states and 12129 transitions. [2018-10-26 19:26:36,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:26:36,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 367 [2018-10-26 19:26:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:26:36,237 INFO L225 Difference]: With dead ends: 9287 [2018-10-26 19:26:36,237 INFO L226 Difference]: Without dead ends: 5550 [2018-10-26 19:26:36,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:26:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2018-10-26 19:26:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5547. [2018-10-26 19:26:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5547 states. [2018-10-26 19:26:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5547 states to 5547 states and 6932 transitions. [2018-10-26 19:26:36,345 INFO L78 Accepts]: Start accepts. Automaton has 5547 states and 6932 transitions. Word has length 367 [2018-10-26 19:26:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:26:36,346 INFO L481 AbstractCegarLoop]: Abstraction has 5547 states and 6932 transitions. [2018-10-26 19:26:36,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:26:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 5547 states and 6932 transitions. [2018-10-26 19:26:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-10-26 19:26:36,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:26:36,356 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:26:36,356 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:26:36,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:26:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash 948428002, now seen corresponding path program 1 times [2018-10-26 19:26:36,357 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:26:36,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:26:36,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:36,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:36,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:26:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-26 19:26:37,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:26:37,201 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 [2018-10-26 19:26:37,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:26:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:26:37,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:27:11,670 WARN L179 SmtUtils]: Spent 28.04 s on a formula simplification. DAG size of input: 17263 DAG size of output: 23 [2018-10-26 19:27:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-26 19:27:11,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:27:11,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-26 19:27:11,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 19:27:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 19:27:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:27:11,855 INFO L87 Difference]: Start difference. First operand 5547 states and 6932 transitions. Second operand 6 states. [2018-10-26 19:28:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:28:06,463 INFO L93 Difference]: Finished difference Result 25662 states and 33373 transitions. [2018-10-26 19:28:06,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 19:28:06,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 392 [2018-10-26 19:28:06,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:28:06,530 INFO L225 Difference]: With dead ends: 25662 [2018-10-26 19:28:06,531 INFO L226 Difference]: Without dead ends: 16745 [2018-10-26 19:28:06,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-26 19:28:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16745 states. [2018-10-26 19:28:06,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16745 to 16737. [2018-10-26 19:28:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16737 states. [2018-10-26 19:28:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16737 states to 16737 states and 19046 transitions. [2018-10-26 19:28:06,911 INFO L78 Accepts]: Start accepts. Automaton has 16737 states and 19046 transitions. Word has length 392 [2018-10-26 19:28:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:28:06,912 INFO L481 AbstractCegarLoop]: Abstraction has 16737 states and 19046 transitions. [2018-10-26 19:28:06,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 19:28:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 16737 states and 19046 transitions. [2018-10-26 19:28:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2018-10-26 19:28:06,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:28:06,929 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:28:06,929 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:28:06,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:28:06,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2047248038, now seen corresponding path program 1 times [2018-10-26 19:28:06,930 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:28:06,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:28:06,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:06,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:06,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:07,759 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 19:28:07,913 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-26 19:28:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 195 proven. 136 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-26 19:28:08,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:28:08,355 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 [2018-10-26 19:28:08,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:08,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:28:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-26 19:28:08,769 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:28:08,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-26 19:28:08,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 19:28:08,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 19:28:08,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-26 19:28:08,771 INFO L87 Difference]: Start difference. First operand 16737 states and 19046 transitions. Second operand 9 states. [2018-10-26 19:28:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:28:17,333 INFO L93 Difference]: Finished difference Result 32754 states and 37318 transitions. [2018-10-26 19:28:17,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 19:28:17,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 516 [2018-10-26 19:28:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:28:17,377 INFO L225 Difference]: With dead ends: 32754 [2018-10-26 19:28:17,377 INFO L226 Difference]: Without dead ends: 16319 [2018-10-26 19:28:17,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 520 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-26 19:28:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16319 states. [2018-10-26 19:28:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16319 to 15515. [2018-10-26 19:28:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15515 states. [2018-10-26 19:28:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15515 states to 15515 states and 16731 transitions. [2018-10-26 19:28:17,712 INFO L78 Accepts]: Start accepts. Automaton has 15515 states and 16731 transitions. Word has length 516 [2018-10-26 19:28:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:28:17,714 INFO L481 AbstractCegarLoop]: Abstraction has 15515 states and 16731 transitions. [2018-10-26 19:28:17,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 19:28:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 15515 states and 16731 transitions. [2018-10-26 19:28:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-10-26 19:28:17,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:28:17,733 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:28:17,733 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:28:17,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:28:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1508555345, now seen corresponding path program 1 times [2018-10-26 19:28:17,734 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:28:17,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:28:17,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:17,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:17,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:18,878 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 19:28:19,426 WARN L179 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2018-10-26 19:28:20,010 WARN L179 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 18 [2018-10-26 19:28:20,229 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2018-10-26 19:28:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 274 proven. 107 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-26 19:28:20,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:28:20,878 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 [2018-10-26 19:28:20,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:21,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:28:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 284 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:28:22,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 19:28:22,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2018-10-26 19:28:22,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 19:28:22,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 19:28:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-10-26 19:28:22,311 INFO L87 Difference]: Start difference. First operand 15515 states and 16731 transitions. Second operand 12 states. [2018-10-26 19:28:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:28:39,278 INFO L93 Difference]: Finished difference Result 40366 states and 43586 transitions. [2018-10-26 19:28:39,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 19:28:39,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 538 [2018-10-26 19:28:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:28:39,324 INFO L225 Difference]: With dead ends: 40366 [2018-10-26 19:28:39,324 INFO L226 Difference]: Without dead ends: 25153 [2018-10-26 19:28:39,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 537 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-10-26 19:28:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25153 states. [2018-10-26 19:28:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25153 to 24527. [2018-10-26 19:28:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24527 states. [2018-10-26 19:28:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24527 states to 24527 states and 26060 transitions. [2018-10-26 19:28:39,669 INFO L78 Accepts]: Start accepts. Automaton has 24527 states and 26060 transitions. Word has length 538 [2018-10-26 19:28:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:28:39,670 INFO L481 AbstractCegarLoop]: Abstraction has 24527 states and 26060 transitions. [2018-10-26 19:28:39,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 19:28:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 24527 states and 26060 transitions. [2018-10-26 19:28:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2018-10-26 19:28:39,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:28:39,685 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:28:39,686 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:28:39,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:28:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1217611752, now seen corresponding path program 1 times [2018-10-26 19:28:39,686 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:28:39,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:28:39,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:39,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:39,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:28:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:40,281 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 19:28:40,655 WARN L179 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-26 19:28:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 204 proven. 155 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-26 19:28:41,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:28:41,085 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 [2018-10-26 19:28:41,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:28:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:28:41,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:28:41,853 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2018-10-26 19:28:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 289 proven. 3 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-26 19:28:42,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 19:28:42,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2018-10-26 19:28:42,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 19:28:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 19:28:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-10-26 19:28:42,503 INFO L87 Difference]: Start difference. First operand 24527 states and 26060 transitions. Second operand 13 states. [2018-10-26 19:28:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:28:59,244 INFO L93 Difference]: Finished difference Result 75129 states and 79990 transitions. [2018-10-26 19:28:59,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-26 19:28:59,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 557 [2018-10-26 19:28:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:28:59,342 INFO L225 Difference]: With dead ends: 75129 [2018-10-26 19:28:59,343 INFO L226 Difference]: Without dead ends: 50904 [2018-10-26 19:28:59,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 591 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=557, Invalid=1795, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 19:28:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50904 states. [2018-10-26 19:28:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50904 to 38940. [2018-10-26 19:28:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38940 states. [2018-10-26 19:28:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38940 states to 38940 states and 41215 transitions. [2018-10-26 19:28:59,962 INFO L78 Accepts]: Start accepts. Automaton has 38940 states and 41215 transitions. Word has length 557 [2018-10-26 19:28:59,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:28:59,964 INFO L481 AbstractCegarLoop]: Abstraction has 38940 states and 41215 transitions. [2018-10-26 19:28:59,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 19:28:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 38940 states and 41215 transitions. [2018-10-26 19:29:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2018-10-26 19:29:00,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:29:00,183 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:29:00,183 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:29:00,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:29:00,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1261418195, now seen corresponding path program 1 times [2018-10-26 19:29:00,186 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:29:00,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:29:00,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:29:00,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:29:00,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:29:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:29:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-10-26 19:29:00,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:29:00,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:29:00,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:29:00,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:29:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:29:00,796 INFO L87 Difference]: Start difference. First operand 38940 states and 41215 transitions. Second operand 3 states. [2018-10-26 19:29:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:29:03,101 INFO L93 Difference]: Finished difference Result 79357 states and 84116 transitions. [2018-10-26 19:29:03,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:29:03,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 635 [2018-10-26 19:29:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:29:03,157 INFO L225 Difference]: With dead ends: 79357 [2018-10-26 19:29:03,157 INFO L226 Difference]: Without dead ends: 44936 [2018-10-26 19:29:03,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:29:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44936 states. [2018-10-26 19:29:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44936 to 44634. [2018-10-26 19:29:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44634 states. [2018-10-26 19:29:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44634 states to 44634 states and 46983 transitions. [2018-10-26 19:29:03,725 INFO L78 Accepts]: Start accepts. Automaton has 44634 states and 46983 transitions. Word has length 635 [2018-10-26 19:29:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:29:03,726 INFO L481 AbstractCegarLoop]: Abstraction has 44634 states and 46983 transitions. [2018-10-26 19:29:03,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:29:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand 44634 states and 46983 transitions. [2018-10-26 19:29:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2018-10-26 19:29:03,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:29:03,745 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:29:03,745 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:29:03,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:29:03,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2078233916, now seen corresponding path program 1 times [2018-10-26 19:29:03,746 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:29:03,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:29:03,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:29:03,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:29:03,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:29:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:29:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 527 proven. 196 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-10-26 19:29:04,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:29:04,773 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 [2018-10-26 19:29:04,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:29:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:29:04,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:29:07,447 WARN L179 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 140 DAG size of output: 23 [2018-10-26 19:29:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 431 proven. 215 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2018-10-26 19:29:08,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 19:29:08,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-26 19:29:08,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 19:29:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 19:29:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-26 19:29:08,524 INFO L87 Difference]: Start difference. First operand 44634 states and 46983 transitions. Second operand 7 states. Received shutdown request... [2018-10-26 19:29:51,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 19:29:51,408 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 19:29:51,414 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 19:29:51,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:29:51 BoogieIcfgContainer [2018-10-26 19:29:51,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 19:29:51,415 INFO L168 Benchmark]: Toolchain (without parser) took 244044.34 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -763.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-26 19:29:51,416 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-10-26 19:29:51,416 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1231.70 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-26 19:29:51,417 INFO L168 Benchmark]: Boogie Procedure Inliner took 383.69 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 776.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -894.5 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-26 19:29:51,418 INFO L168 Benchmark]: Boogie Preprocessor took 223.27 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 41.1 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. [2018-10-26 19:29:51,419 INFO L168 Benchmark]: RCFGBuilder took 6708.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 309.3 MB). Peak memory consumption was 309.3 MB. Max. memory is 7.1 GB. [2018-10-26 19:29:51,420 INFO L168 Benchmark]: TraceAbstraction took 235491.29 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 2.2 GB in the end (delta: -325.0 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-10-26 19:29:51,424 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 1231.70 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 383.69 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 776.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -894.5 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 223.27 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 41.1 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6708.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 309.3 MB). Peak memory consumption was 309.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235491.29 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 2.2 GB in the end (delta: -325.0 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 43]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 43). Cancelled while BasicCegarLoop was constructing difference of abstraction (44634states) and FLOYD_HOARE automaton (currently 10 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (22144 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 235.4s OverallTime, 11 OverallIterations, 5 TraceHistogramMax, 178.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3283 SDtfs, 21704 SDslu, 3547 SDs, 0 SdLazy, 47504 SolverSat, 6325 SolverUnsat, 34 SolverUnknown, 0 SolverNotchecked, 163.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3091 GetRequests, 2970 SyntacticMatches, 24 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 42.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44634occurred in iteration=10, 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: 2.5s AutomataMinimizationTime, 10 MinimizatonAttempts, 16483 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 49.3s InterpolantComputationTime, 7239 NumberOfCodeBlocks, 7239 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 7222 ConstructedInterpolants, 273 QuantifiedInterpolants, 19346151 SizeOfPredicates, 6 NumberOfNonLiveVariables, 3528 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 4432/5377 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown