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/Problem11_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:04:54,229 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:04:54,231 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:04:54,243 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:04:54,244 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:04:54,245 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:04:54,246 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:04:54,247 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:04:54,249 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:04:54,250 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:04:54,251 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:04:54,251 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:04:54,252 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:04:54,253 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:04:54,254 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:04:54,255 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:04:54,256 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:04:54,258 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:04:54,260 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:04:54,261 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:04:54,262 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:04:54,263 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:04:54,266 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 20:04:54,266 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 20:04:54,266 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 20:04:54,267 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 20:04:54,268 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 20:04:54,269 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 20:04:54,270 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 20:04:54,274 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 20:04:54,274 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 20:04:54,275 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 20:04:54,275 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 20:04:54,276 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 20:04:54,277 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 20:04:54,278 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 20:04:54,278 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 20:04:54,310 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:04:54,310 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:04:54,313 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:04:54,313 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:04:54,314 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:04:54,314 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:04:54,315 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:04:54,315 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:04:54,315 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:04:54,315 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:04:54,315 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:04:54,316 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:04:54,317 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:04:54,317 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:04:54,317 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:04:54,318 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:04:54,318 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:04:54,318 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:04:54,318 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:04:54,318 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:04:54,320 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:04:54,320 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:04:54,320 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:04:54,321 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:04:54,321 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:04:54,321 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:04:54,321 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:04:54,322 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:04:54,381 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:04:54,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:04:54,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:04:54,405 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:04:54,406 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:04:54,406 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-10-23 20:04:54,463 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/352baac18/8838ae79e4ca4998a7102a6dde720b53/FLAG1e3b24d81 [2018-10-23 20:04:55,047 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:04:55,048 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-10-23 20:04:55,078 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/352baac18/8838ae79e4ca4998a7102a6dde720b53/FLAG1e3b24d81 [2018-10-23 20:04:55,105 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/352baac18/8838ae79e4ca4998a7102a6dde720b53 [2018-10-23 20:04:55,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:04:55,120 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:04:55,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:04:55,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:04:55,125 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:04:55,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:04:55" (1/1) ... [2018-10-23 20:04:55,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33fe9958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:55, skipping insertion in model container [2018-10-23 20:04:55,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:04:55" (1/1) ... [2018-10-23 20:04:55,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:04:55,217 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:04:55,852 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:04:55,859 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:04:56,053 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:04:56,074 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:04:56,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56 WrapperNode [2018-10-23 20:04:56,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:04:56,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:04:56,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:04:56,076 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:04:56,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... [2018-10-23 20:04:56,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... [2018-10-23 20:04:56,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:04:56,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:04:56,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:04:56,406 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:04:56,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... [2018-10-23 20:04:56,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... [2018-10-23 20:04:56,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... [2018-10-23 20:04:56,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... [2018-10-23 20:04:56,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... [2018-10-23 20:04:56,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... [2018-10-23 20:04:56,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... [2018-10-23 20:04:56,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:04:56,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:04:56,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:04:56,523 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:04:56,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:04:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:04:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:04:56,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:05:01,396 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:05:01,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:05:01 BoogieIcfgContainer [2018-10-23 20:05:01,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:05:01,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:05:01,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:05:01,407 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:05:01,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:04:55" (1/3) ... [2018-10-23 20:05:01,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9b60b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:05:01, skipping insertion in model container [2018-10-23 20:05:01,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:04:56" (2/3) ... [2018-10-23 20:05:01,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9b60b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:05:01, skipping insertion in model container [2018-10-23 20:05:01,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:05:01" (3/3) ... [2018-10-23 20:05:01,412 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label54_true-unreach-call.c [2018-10-23 20:05:01,424 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:05:01,438 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:05:01,458 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:05:01,507 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:05:01,508 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:05:01,508 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:05:01,509 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:05:01,509 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:05:01,509 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:05:01,509 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:05:01,510 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:05:01,510 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:05:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states. [2018-10-23 20:05:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-23 20:05:01,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:01,565 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:05:01,567 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:01,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash -387853398, now seen corresponding path program 1 times [2018-10-23 20:05:01,577 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:01,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:01,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:01,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:01,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:05:02,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:05:02,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:05:02,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:05:02,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:05:02,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:02,064 INFO L87 Difference]: Start difference. First operand 284 states. Second operand 4 states. [2018-10-23 20:05:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:05,784 INFO L93 Difference]: Finished difference Result 974 states and 1747 transitions. [2018-10-23 20:05:05,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:05:05,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2018-10-23 20:05:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:05,811 INFO L225 Difference]: With dead ends: 974 [2018-10-23 20:05:05,811 INFO L226 Difference]: Without dead ends: 683 [2018-10-23 20:05:05,817 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 [2018-10-23 20:05:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-10-23 20:05:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 677. [2018-10-23 20:05:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2018-10-23 20:05:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1087 transitions. [2018-10-23 20:05:05,905 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1087 transitions. Word has length 38 [2018-10-23 20:05:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:05,906 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 1087 transitions. [2018-10-23 20:05:05,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:05:05,907 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1087 transitions. [2018-10-23 20:05:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-23 20:05:05,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:05,913 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:05:05,917 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:05,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1847844740, now seen corresponding path program 1 times [2018-10-23 20:05:05,917 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:05,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:05,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:05,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:05,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:05:06,374 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:05:06,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:05:06,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:05:06,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:05:06,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:05:06,378 INFO L87 Difference]: Start difference. First operand 677 states and 1087 transitions. Second operand 5 states. [2018-10-23 20:05:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:10,422 INFO L93 Difference]: Finished difference Result 2119 states and 3285 transitions. [2018-10-23 20:05:10,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:05:10,423 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2018-10-23 20:05:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:10,433 INFO L225 Difference]: With dead ends: 2119 [2018-10-23 20:05:10,433 INFO L226 Difference]: Without dead ends: 1444 [2018-10-23 20:05:10,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:05:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2018-10-23 20:05:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1240. [2018-10-23 20:05:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2018-10-23 20:05:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1789 transitions. [2018-10-23 20:05:10,487 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1789 transitions. Word has length 108 [2018-10-23 20:05:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:10,487 INFO L481 AbstractCegarLoop]: Abstraction has 1240 states and 1789 transitions. [2018-10-23 20:05:10,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:05:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1789 transitions. [2018-10-23 20:05:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-23 20:05:10,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:10,494 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:05:10,494 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:10,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:10,494 INFO L82 PathProgramCache]: Analyzing trace with hash -768396831, now seen corresponding path program 1 times [2018-10-23 20:05:10,495 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:10,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:10,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:10,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:10,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-23 20:05:10,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:05:10,940 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:05:10,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:11,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:05:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:05:11,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:05:11,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-23 20:05:11,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:05:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:05:11,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:11,163 INFO L87 Difference]: Start difference. First operand 1240 states and 1789 transitions. Second operand 4 states. [2018-10-23 20:05:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:15,550 INFO L93 Difference]: Finished difference Result 3779 states and 5665 transitions. [2018-10-23 20:05:15,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:05:15,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2018-10-23 20:05:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:15,565 INFO L225 Difference]: With dead ends: 3779 [2018-10-23 20:05:15,565 INFO L226 Difference]: Without dead ends: 2541 [2018-10-23 20:05:15,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2018-10-23 20:05:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1978. [2018-10-23 20:05:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2018-10-23 20:05:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2674 transitions. [2018-10-23 20:05:15,614 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2674 transitions. Word has length 182 [2018-10-23 20:05:15,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:15,615 INFO L481 AbstractCegarLoop]: Abstraction has 1978 states and 2674 transitions. [2018-10-23 20:05:15,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:05:15,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2674 transitions. [2018-10-23 20:05:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-23 20:05:15,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:15,620 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:05:15,620 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:15,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash 546145324, now seen corresponding path program 1 times [2018-10-23 20:05:15,621 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:15,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:15,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:15,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:15,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-23 20:05:15,898 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:05:15,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:05:15,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:05:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:05:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:15,899 INFO L87 Difference]: Start difference. First operand 1978 states and 2674 transitions. Second operand 4 states. [2018-10-23 20:05:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:20,663 INFO L93 Difference]: Finished difference Result 6746 states and 9325 transitions. [2018-10-23 20:05:20,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:05:20,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 188 [2018-10-23 20:05:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:20,687 INFO L225 Difference]: With dead ends: 6746 [2018-10-23 20:05:20,687 INFO L226 Difference]: Without dead ends: 4770 [2018-10-23 20:05:20,691 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 [2018-10-23 20:05:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2018-10-23 20:05:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 4754. [2018-10-23 20:05:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4754 states. [2018-10-23 20:05:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4754 states to 4754 states and 6178 transitions. [2018-10-23 20:05:20,779 INFO L78 Accepts]: Start accepts. Automaton has 4754 states and 6178 transitions. Word has length 188 [2018-10-23 20:05:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:20,779 INFO L481 AbstractCegarLoop]: Abstraction has 4754 states and 6178 transitions. [2018-10-23 20:05:20,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:05:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4754 states and 6178 transitions. [2018-10-23 20:05:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-23 20:05:20,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:20,784 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:05:20,784 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:20,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:20,785 INFO L82 PathProgramCache]: Analyzing trace with hash 802358184, now seen corresponding path program 1 times [2018-10-23 20:05:20,785 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:20,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:20,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:20,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:20,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-23 20:05:21,059 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:05:21,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:05:21,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:05:21,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:05:21,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:21,060 INFO L87 Difference]: Start difference. First operand 4754 states and 6178 transitions. Second operand 4 states. [2018-10-23 20:05:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:23,391 INFO L93 Difference]: Finished difference Result 12112 states and 15989 transitions. [2018-10-23 20:05:23,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:05:23,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 232 [2018-10-23 20:05:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:23,428 INFO L225 Difference]: With dead ends: 12112 [2018-10-23 20:05:23,428 INFO L226 Difference]: Without dead ends: 7545 [2018-10-23 20:05:23,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7545 states. [2018-10-23 20:05:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7545 to 7160. [2018-10-23 20:05:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7160 states. [2018-10-23 20:05:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 9159 transitions. [2018-10-23 20:05:23,571 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 9159 transitions. Word has length 232 [2018-10-23 20:05:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:23,572 INFO L481 AbstractCegarLoop]: Abstraction has 7160 states and 9159 transitions. [2018-10-23 20:05:23,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:05:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 9159 transitions. [2018-10-23 20:05:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-23 20:05:23,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:23,579 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:05:23,579 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:23,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1805515545, now seen corresponding path program 1 times [2018-10-23 20:05:23,580 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:23,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:23,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:23,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:23,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:24,005 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 20:05:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:05:24,095 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:05:24,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:05:24,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:05:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:05:24,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:05:24,096 INFO L87 Difference]: Start difference. First operand 7160 states and 9159 transitions. Second operand 5 states. [2018-10-23 20:05:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:27,407 INFO L93 Difference]: Finished difference Result 16935 states and 21983 transitions. [2018-10-23 20:05:27,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:05:27,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2018-10-23 20:05:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:27,447 INFO L225 Difference]: With dead ends: 16935 [2018-10-23 20:05:27,447 INFO L226 Difference]: Without dead ends: 9777 [2018-10-23 20:05:27,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:05:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9777 states. [2018-10-23 20:05:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9777 to 9573. [2018-10-23 20:05:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9573 states. [2018-10-23 20:05:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9573 states to 9573 states and 11910 transitions. [2018-10-23 20:05:27,627 INFO L78 Accepts]: Start accepts. Automaton has 9573 states and 11910 transitions. Word has length 236 [2018-10-23 20:05:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:27,627 INFO L481 AbstractCegarLoop]: Abstraction has 9573 states and 11910 transitions. [2018-10-23 20:05:27,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:05:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 9573 states and 11910 transitions. [2018-10-23 20:05:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-23 20:05:27,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:27,634 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:05:27,634 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:27,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:27,635 INFO L82 PathProgramCache]: Analyzing trace with hash 686440571, now seen corresponding path program 1 times [2018-10-23 20:05:27,635 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:27,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:27,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:27,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:27,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:28,221 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-10-23 20:05:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 136 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:05:28,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:05:28,337 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:05:28,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:28,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:05:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:05:28,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:05:28,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-23 20:05:28,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:05:28,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:05:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:05:28,818 INFO L87 Difference]: Start difference. First operand 9573 states and 11910 transitions. Second operand 7 states. [2018-10-23 20:05:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:34,866 INFO L93 Difference]: Finished difference Result 23404 states and 29625 transitions. [2018-10-23 20:05:34,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 20:05:34,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 252 [2018-10-23 20:05:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:34,895 INFO L225 Difference]: With dead ends: 23404 [2018-10-23 20:05:34,895 INFO L226 Difference]: Without dead ends: 13274 [2018-10-23 20:05:34,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-23 20:05:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13274 states. [2018-10-23 20:05:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13274 to 10857. [2018-10-23 20:05:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10857 states. [2018-10-23 20:05:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10857 states to 10857 states and 12865 transitions. [2018-10-23 20:05:35,073 INFO L78 Accepts]: Start accepts. Automaton has 10857 states and 12865 transitions. Word has length 252 [2018-10-23 20:05:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:35,074 INFO L481 AbstractCegarLoop]: Abstraction has 10857 states and 12865 transitions. [2018-10-23 20:05:35,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:05:35,074 INFO L276 IsEmpty]: Start isEmpty. Operand 10857 states and 12865 transitions. [2018-10-23 20:05:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-23 20:05:35,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:35,084 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-23 20:05:35,085 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:35,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1339864948, now seen corresponding path program 1 times [2018-10-23 20:05:35,085 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:35,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:35,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:35,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:35,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:35,620 WARN L179 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 20:05:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-23 20:05:35,688 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:05:35,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:05:35,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:05:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:05:35,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:35,689 INFO L87 Difference]: Start difference. First operand 10857 states and 12865 transitions. Second operand 4 states. [2018-10-23 20:05:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:38,955 INFO L93 Difference]: Finished difference Result 22292 states and 26350 transitions. [2018-10-23 20:05:38,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:05:38,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 298 [2018-10-23 20:05:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:38,977 INFO L225 Difference]: With dead ends: 22292 [2018-10-23 20:05:38,977 INFO L226 Difference]: Without dead ends: 11437 [2018-10-23 20:05:38,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11437 states. [2018-10-23 20:05:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11437 to 10672. [2018-10-23 20:05:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10672 states. [2018-10-23 20:05:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10672 states to 10672 states and 12366 transitions. [2018-10-23 20:05:39,133 INFO L78 Accepts]: Start accepts. Automaton has 10672 states and 12366 transitions. Word has length 298 [2018-10-23 20:05:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:39,134 INFO L481 AbstractCegarLoop]: Abstraction has 10672 states and 12366 transitions. [2018-10-23 20:05:39,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:05:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 10672 states and 12366 transitions. [2018-10-23 20:05:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-10-23 20:05:39,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:39,143 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:05:39,144 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:39,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:39,144 INFO L82 PathProgramCache]: Analyzing trace with hash 125047579, now seen corresponding path program 1 times [2018-10-23 20:05:39,144 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:39,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:39,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:39,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:39,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 160 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:05:39,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:05:39,533 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:05:39,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:39,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:05:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-23 20:05:39,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:05:39,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2018-10-23 20:05:39,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:05:39,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:05:39,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:39,767 INFO L87 Difference]: Start difference. First operand 10672 states and 12366 transitions. Second operand 4 states. [2018-10-23 20:05:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:41,385 INFO L93 Difference]: Finished difference Result 20783 states and 24090 transitions. [2018-10-23 20:05:41,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:05:41,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 301 [2018-10-23 20:05:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:41,404 INFO L225 Difference]: With dead ends: 20783 [2018-10-23 20:05:41,405 INFO L226 Difference]: Without dead ends: 10113 [2018-10-23 20:05:41,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:05:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10113 states. [2018-10-23 20:05:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10113 to 9925. [2018-10-23 20:05:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9925 states. [2018-10-23 20:05:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 11283 transitions. [2018-10-23 20:05:41,546 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 11283 transitions. Word has length 301 [2018-10-23 20:05:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:41,547 INFO L481 AbstractCegarLoop]: Abstraction has 9925 states and 11283 transitions. [2018-10-23 20:05:41,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:05:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 11283 transitions. [2018-10-23 20:05:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-23 20:05:41,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:41,560 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 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] [2018-10-23 20:05:41,560 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:41,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1507023947, now seen corresponding path program 1 times [2018-10-23 20:05:41,561 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:41,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:41,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:41,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:41,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 210 proven. 97 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-23 20:05:41,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:05:41,939 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) [2018-10-23 20:05:41,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:05:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:42,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:05:42,300 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-23 20:05:46,550 WARN L179 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 555 DAG size of output: 28 [2018-10-23 20:05:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 65 proven. 181 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-23 20:05:46,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:05:46,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2018-10-23 20:05:46,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:05:46,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:05:46,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:05:46,878 INFO L87 Difference]: Start difference. First operand 9925 states and 11283 transitions. Second operand 9 states. [2018-10-23 20:07:03,408 WARN L179 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-10-23 20:07:13,163 WARN L179 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-23 20:07:14,585 WARN L179 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2018-10-23 20:07:17,495 WARN L179 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2018-10-23 20:07:18,342 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-23 20:07:24,342 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2018-10-23 20:07:43,253 WARN L179 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 32 [2018-10-23 20:08:21,806 WARN L179 SmtUtils]: Spent 628.00 ms on a formula simplification that was a NOOP. DAG size: 40 Received shutdown request... [2018-10-23 20:09:20,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-23 20:09:20,613 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:09:20,619 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:09:20,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:09:20 BoogieIcfgContainer [2018-10-23 20:09:20,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:09:20,621 INFO L168 Benchmark]: Toolchain (without parser) took 265502.85 ms. Allocated memory was 1.5 GB in the beginning and 3.0 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -240.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-23 20:09:20,622 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:09:20,622 INFO L168 Benchmark]: CACSL2BoogieTranslator took 953.87 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: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-10-23 20:09:20,623 INFO L168 Benchmark]: Boogie Procedure Inliner took 329.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -839.8 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2018-10-23 20:09:20,624 INFO L168 Benchmark]: Boogie Preprocessor took 117.10 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:09:20,624 INFO L168 Benchmark]: RCFGBuilder took 4878.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 187.2 MB). Peak memory consumption was 187.2 MB. Max. memory is 7.1 GB. [2018-10-23 20:09:20,625 INFO L168 Benchmark]: TraceAbstraction took 259216.65 ms. Allocated memory was 2.3 GB in the beginning and 3.0 GB in the end (delta: 693.1 MB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 345.7 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-10-23 20:09:20,630 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 953.87 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: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 329.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -839.8 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.10 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4878.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 187.2 MB). Peak memory consumption was 187.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 259216.65 ms. Allocated memory was 2.3 GB in the beginning and 3.0 GB in the end (delta: 693.1 MB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 345.7 MB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 117). Cancelled while BasicCegarLoop was constructing difference of abstraction (9925states) and FLOYD_HOARE automaton (currently 29 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (23942 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 284 locations, 1 error locations. TIMEOUT Result, 259.1s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 247.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2497 SDtfs, 8464 SDslu, 2075 SDs, 0 SdLazy, 22201 SolverSat, 4038 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 226.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1116 GetRequests, 1058 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 20.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10857occurred in iteration=7, 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: 0.9s AutomataMinimizationTime, 9 MinimizatonAttempts, 4748 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 3208 NumberOfCodeBlocks, 3208 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 3194 ConstructedInterpolants, 36 QuantifiedInterpolants, 3457471 SizeOfPredicates, 5 NumberOfNonLiveVariables, 1439 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 14 InterpolantComputations, 9 PerfectInterpolantSequences, 1920/2215 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown