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/Problem16_label22_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 18:20:16,606 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 18:20:16,608 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 18:20:16,622 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 18:20:16,622 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 18:20:16,624 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 18:20:16,625 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 18:20:16,627 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 18:20:16,628 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 18:20:16,629 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 18:20:16,630 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 18:20:16,630 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 18:20:16,631 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 18:20:16,632 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 18:20:16,634 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 18:20:16,634 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 18:20:16,635 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 18:20:16,637 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 18:20:16,639 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 18:20:16,641 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 18:20:16,642 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 18:20:16,643 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 18:20:16,648 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 18:20:16,648 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 18:20:16,648 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 18:20:16,649 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 18:20:16,650 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 18:20:16,651 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 18:20:16,652 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 18:20:16,653 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 18:20:16,654 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 18:20:16,654 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 18:20:16,654 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 18:20:16,655 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 18:20:16,656 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 18:20:16,656 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 18:20:16,657 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 18:20:16,673 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 18:20:16,674 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 18:20:16,675 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 18:20:16,675 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 18:20:16,676 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 18:20:16,679 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 18:20:16,679 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 18:20:16,679 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 18:20:16,680 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 18:20:16,680 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 18:20:16,680 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 18:20:16,680 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 18:20:16,680 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 18:20:16,681 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 18:20:16,681 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 18:20:16,681 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 18:20:16,681 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 18:20:16,682 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 18:20:16,682 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 18:20:16,682 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:20:16,682 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 18:20:16,682 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 18:20:16,683 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 18:20:16,683 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 18:20:16,683 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 18:20:16,683 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 18:20:16,684 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 18:20:16,685 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 18:20:16,750 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 18:20:16,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 18:20:16,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 18:20:16,776 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 18:20:16,777 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 18:20:16,778 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label22_false-unreach-call.c [2018-10-23 18:20:16,844 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/76ff0774a/8d2e40230f4c4752bf82a35160ec3c98/FLAGfe6efb4c6 [2018-10-23 18:20:17,481 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 18:20:17,482 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label22_false-unreach-call.c [2018-10-23 18:20:17,506 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/76ff0774a/8d2e40230f4c4752bf82a35160ec3c98/FLAGfe6efb4c6 [2018-10-23 18:20:17,525 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/76ff0774a/8d2e40230f4c4752bf82a35160ec3c98 [2018-10-23 18:20:17,538 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 18:20:17,540 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 18:20:17,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 18:20:17,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 18:20:17,548 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 18:20:17,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:20:17" (1/1) ... [2018-10-23 18:20:17,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad6d500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:17, skipping insertion in model container [2018-10-23 18:20:17,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:20:17" (1/1) ... [2018-10-23 18:20:17,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 18:20:17,644 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 18:20:18,331 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:20:18,336 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 18:20:18,590 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:20:18,614 INFO L193 MainTranslator]: Completed translation [2018-10-23 18:20:18,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18 WrapperNode [2018-10-23 18:20:18,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 18:20:18,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 18:20:18,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 18:20:18,617 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 18:20:18,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (1/1) ... [2018-10-23 18:20:18,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (1/1) ... [2018-10-23 18:20:18,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 18:20:18,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 18:20:18,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 18:20:18,952 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 18:20:18,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (1/1) ... [2018-10-23 18:20:18,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (1/1) ... [2018-10-23 18:20:18,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (1/1) ... [2018-10-23 18:20:18,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (1/1) ... [2018-10-23 18:20:19,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (1/1) ... [2018-10-23 18:20:19,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (1/1) ... [2018-10-23 18:20:19,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (1/1) ... [2018-10-23 18:20:19,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 18:20:19,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 18:20:19,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 18:20:19,122 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 18:20:19,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (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 18:20:19,200 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 18:20:19,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 18:20:19,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 18:20:25,974 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 18:20:25,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:20:25 BoogieIcfgContainer [2018-10-23 18:20:25,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 18:20:25,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 18:20:25,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 18:20:25,984 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 18:20:25,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:20:17" (1/3) ... [2018-10-23 18:20:25,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512d1fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:20:25, skipping insertion in model container [2018-10-23 18:20:25,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:20:18" (2/3) ... [2018-10-23 18:20:25,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512d1fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:20:25, skipping insertion in model container [2018-10-23 18:20:25,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:20:25" (3/3) ... [2018-10-23 18:20:25,988 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label22_false-unreach-call.c [2018-10-23 18:20:25,998 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 18:20:26,012 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 18:20:26,032 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 18:20:26,078 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 18:20:26,079 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 18:20:26,080 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 18:20:26,080 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 18:20:26,080 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 18:20:26,080 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 18:20:26,080 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 18:20:26,080 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 18:20:26,081 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 18:20:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-23 18:20:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-23 18:20:26,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:26,118 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:20:26,120 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:26,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash 340357962, now seen corresponding path program 1 times [2018-10-23 18:20:26,129 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:26,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:26,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:26,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:26,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:26,476 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-23 18:20:26,482 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 18:20:26,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:26,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:20:26,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:20:26,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:20:26,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:20:26,512 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 4 states. [2018-10-23 18:20:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:33,302 INFO L93 Difference]: Finished difference Result 1473 states and 2781 transitions. [2018-10-23 18:20:33,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:20:33,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-23 18:20:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:33,336 INFO L225 Difference]: With dead ends: 1473 [2018-10-23 18:20:33,336 INFO L226 Difference]: Without dead ends: 1069 [2018-10-23 18:20:33,342 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 18:20:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2018-10-23 18:20:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1069. [2018-10-23 18:20:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2018-10-23 18:20:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1914 transitions. [2018-10-23 18:20:33,496 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1914 transitions. Word has length 14 [2018-10-23 18:20:33,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:33,497 INFO L481 AbstractCegarLoop]: Abstraction has 1069 states and 1914 transitions. [2018-10-23 18:20:33,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:20:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1914 transitions. [2018-10-23 18:20:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-23 18:20:33,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:33,503 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:20:33,503 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:33,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash 549376810, now seen corresponding path program 1 times [2018-10-23 18:20:33,504 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:33,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:33,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:33,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:33,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:20:33,817 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:33,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:20:33,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:20:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:20:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:20:33,820 INFO L87 Difference]: Start difference. First operand 1069 states and 1914 transitions. Second operand 4 states. [2018-10-23 18:20:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:39,146 INFO L93 Difference]: Finished difference Result 4116 states and 7498 transitions. [2018-10-23 18:20:39,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:20:39,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2018-10-23 18:20:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:39,165 INFO L225 Difference]: With dead ends: 4116 [2018-10-23 18:20:39,166 INFO L226 Difference]: Without dead ends: 3049 [2018-10-23 18:20:39,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:20:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2018-10-23 18:20:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 3049. [2018-10-23 18:20:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3049 states. [2018-10-23 18:20:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 4881 transitions. [2018-10-23 18:20:39,241 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 4881 transitions. Word has length 81 [2018-10-23 18:20:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:39,241 INFO L481 AbstractCegarLoop]: Abstraction has 3049 states and 4881 transitions. [2018-10-23 18:20:39,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:20:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 4881 transitions. [2018-10-23 18:20:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-23 18:20:39,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:39,250 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:20:39,250 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:39,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:39,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1240645888, now seen corresponding path program 1 times [2018-10-23 18:20:39,251 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:39,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:39,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:39,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:39,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:39,760 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-10-23 18:20:39,869 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-10-23 18:20:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:20:40,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:40,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 18:20:40,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 18:20:40,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 18:20:40,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:20:40,012 INFO L87 Difference]: Start difference. First operand 3049 states and 4881 transitions. Second operand 7 states. [2018-10-23 18:20:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:48,315 INFO L93 Difference]: Finished difference Result 9395 states and 14329 transitions. [2018-10-23 18:20:48,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:20:48,317 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2018-10-23 18:20:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:48,351 INFO L225 Difference]: With dead ends: 9395 [2018-10-23 18:20:48,351 INFO L226 Difference]: Without dead ends: 6348 [2018-10-23 18:20:48,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:20:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2018-10-23 18:20:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 6016. [2018-10-23 18:20:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6016 states. [2018-10-23 18:20:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 8749 transitions. [2018-10-23 18:20:48,475 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 8749 transitions. Word has length 149 [2018-10-23 18:20:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:48,476 INFO L481 AbstractCegarLoop]: Abstraction has 6016 states and 8749 transitions. [2018-10-23 18:20:48,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 18:20:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 8749 transitions. [2018-10-23 18:20:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-23 18:20:48,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:48,480 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:48,481 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:48,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1900838013, now seen corresponding path program 1 times [2018-10-23 18:20:48,481 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:48,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:48,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:48,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:48,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:48,873 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 18:20:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-23 18:20:49,215 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:49,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 18:20:49,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 18:20:49,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 18:20:49,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:20:49,216 INFO L87 Difference]: Start difference. First operand 6016 states and 8749 transitions. Second operand 7 states. [2018-10-23 18:20:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:55,601 INFO L93 Difference]: Finished difference Result 12419 states and 17899 transitions. [2018-10-23 18:20:55,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:20:55,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 241 [2018-10-23 18:20:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:55,631 INFO L225 Difference]: With dead ends: 12419 [2018-10-23 18:20:55,631 INFO L226 Difference]: Without dead ends: 6405 [2018-10-23 18:20:55,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:20:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6405 states. [2018-10-23 18:20:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6405 to 6346. [2018-10-23 18:20:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6346 states. [2018-10-23 18:20:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6346 states to 6346 states and 9085 transitions. [2018-10-23 18:20:55,757 INFO L78 Accepts]: Start accepts. Automaton has 6346 states and 9085 transitions. Word has length 241 [2018-10-23 18:20:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:55,757 INFO L481 AbstractCegarLoop]: Abstraction has 6346 states and 9085 transitions. [2018-10-23 18:20:55,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 18:20:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6346 states and 9085 transitions. [2018-10-23 18:20:55,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-23 18:20:55,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:55,761 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:55,761 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:55,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:55,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1428658561, now seen corresponding path program 1 times [2018-10-23 18:20:55,762 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:55,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:55,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:55,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:55,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-23 18:20:56,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:56,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:20:56,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:20:56,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:20:56,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:20:56,143 INFO L87 Difference]: Start difference. First operand 6346 states and 9085 transitions. Second operand 4 states. [2018-10-23 18:20:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:58,414 INFO L93 Difference]: Finished difference Result 16980 states and 24791 transitions. [2018-10-23 18:20:58,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:20:58,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2018-10-23 18:20:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:58,463 INFO L225 Difference]: With dead ends: 16980 [2018-10-23 18:20:58,463 INFO L226 Difference]: Without dead ends: 10966 [2018-10-23 18:20:58,474 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 18:20:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10966 states. [2018-10-23 18:20:58,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10966 to 10966. [2018-10-23 18:20:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10966 states. [2018-10-23 18:20:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10966 states to 10966 states and 14706 transitions. [2018-10-23 18:20:58,642 INFO L78 Accepts]: Start accepts. Automaton has 10966 states and 14706 transitions. Word has length 244 [2018-10-23 18:20:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:58,643 INFO L481 AbstractCegarLoop]: Abstraction has 10966 states and 14706 transitions. [2018-10-23 18:20:58,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:20:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 10966 states and 14706 transitions. [2018-10-23 18:20:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-23 18:20:58,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:58,651 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:58,651 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:58,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:58,651 INFO L82 PathProgramCache]: Analyzing trace with hash 697681205, now seen corresponding path program 1 times [2018-10-23 18:20:58,652 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:58,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:58,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:58,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:58,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-23 18:20:58,936 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:58,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:20:59,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:20:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:20:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:20:59,084 INFO L87 Difference]: Start difference. First operand 10966 states and 14706 transitions. Second operand 3 states. [2018-10-23 18:21:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:01,746 INFO L93 Difference]: Finished difference Result 26550 states and 35820 transitions. [2018-10-23 18:21:01,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:21:01,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 394 [2018-10-23 18:21:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:01,773 INFO L225 Difference]: With dead ends: 26550 [2018-10-23 18:21:01,773 INFO L226 Difference]: Without dead ends: 12590 [2018-10-23 18:21:01,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:21:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12590 states. [2018-10-23 18:21:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12590 to 12590. [2018-10-23 18:21:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12590 states. [2018-10-23 18:21:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12590 states to 12590 states and 14003 transitions. [2018-10-23 18:21:01,949 INFO L78 Accepts]: Start accepts. Automaton has 12590 states and 14003 transitions. Word has length 394 [2018-10-23 18:21:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:01,949 INFO L481 AbstractCegarLoop]: Abstraction has 12590 states and 14003 transitions. [2018-10-23 18:21:01,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:21:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 12590 states and 14003 transitions. [2018-10-23 18:21:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-10-23 18:21:01,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:01,958 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 18:21:01,958 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:01,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:01,958 INFO L82 PathProgramCache]: Analyzing trace with hash 201322050, now seen corresponding path program 1 times [2018-10-23 18:21:01,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:01,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:01,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:01,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:01,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:21:02,331 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:21:02,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:21:02,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:21:02,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:21:02,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:21:02,332 INFO L87 Difference]: Start difference. First operand 12590 states and 14003 transitions. Second operand 4 states. [2018-10-23 18:21:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:04,955 INFO L93 Difference]: Finished difference Result 31778 states and 35523 transitions. [2018-10-23 18:21:04,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:21:04,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 410 [2018-10-23 18:21:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:04,992 INFO L225 Difference]: With dead ends: 31778 [2018-10-23 18:21:04,992 INFO L226 Difference]: Without dead ends: 19520 [2018-10-23 18:21:05,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:21:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19520 states. [2018-10-23 18:21:05,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19520 to 18530. [2018-10-23 18:21:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18530 states. [2018-10-23 18:21:05,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18530 states to 18530 states and 20230 transitions. [2018-10-23 18:21:05,250 INFO L78 Accepts]: Start accepts. Automaton has 18530 states and 20230 transitions. Word has length 410 [2018-10-23 18:21:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:05,252 INFO L481 AbstractCegarLoop]: Abstraction has 18530 states and 20230 transitions. [2018-10-23 18:21:05,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:21:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 18530 states and 20230 transitions. [2018-10-23 18:21:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-10-23 18:21:05,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:05,262 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:05,263 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:05,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:05,263 INFO L82 PathProgramCache]: Analyzing trace with hash -175545890, now seen corresponding path program 1 times [2018-10-23 18:21:05,263 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:05,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:05,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:05,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:05,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:05,851 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:21:06,239 WARN L179 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-23 18:21:06,839 WARN L179 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2018-10-23 18:21:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 67 proven. 130 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-23 18:21:07,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:21:07,438 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 18:21:07,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:07,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:21:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2018-10-23 18:21:07,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:21:07,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 10 [2018-10-23 18:21:07,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 18:21:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 18:21:07,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-23 18:21:07,819 INFO L87 Difference]: Start difference. First operand 18530 states and 20230 transitions. Second operand 11 states. [2018-10-23 18:21:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:16,693 INFO L93 Difference]: Finished difference Result 44021 states and 47868 transitions. [2018-10-23 18:21:16,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 18:21:16,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 422 [2018-10-23 18:21:16,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:16,742 INFO L225 Difference]: With dead ends: 44021 [2018-10-23 18:21:16,742 INFO L226 Difference]: Without dead ends: 25823 [2018-10-23 18:21:16,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2018-10-23 18:21:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25823 states. [2018-10-23 18:21:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25823 to 23809. [2018-10-23 18:21:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23809 states. [2018-10-23 18:21:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23809 states to 23809 states and 25479 transitions. [2018-10-23 18:21:17,146 INFO L78 Accepts]: Start accepts. Automaton has 23809 states and 25479 transitions. Word has length 422 [2018-10-23 18:21:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:17,147 INFO L481 AbstractCegarLoop]: Abstraction has 23809 states and 25479 transitions. [2018-10-23 18:21:17,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 18:21:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 23809 states and 25479 transitions. [2018-10-23 18:21:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2018-10-23 18:21:17,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:17,157 INFO L375 BasicCegarLoop]: trace histogram [5, 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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:17,158 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:17,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:17,158 INFO L82 PathProgramCache]: Analyzing trace with hash 77242414, now seen corresponding path program 1 times [2018-10-23 18:21:17,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:17,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:17,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:17,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:17,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:17,814 WARN L179 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 18:21:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 457 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-10-23 18:21:18,101 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:21:18,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:21:18,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:21:18,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:21:18,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:21:18,103 INFO L87 Difference]: Start difference. First operand 23809 states and 25479 transitions. Second operand 4 states. [2018-10-23 18:21:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:20,814 INFO L93 Difference]: Finished difference Result 47286 states and 50624 transitions. [2018-10-23 18:21:20,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:21:20,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 548 [2018-10-23 18:21:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:20,862 INFO L225 Difference]: With dead ends: 47286 [2018-10-23 18:21:20,862 INFO L226 Difference]: Without dead ends: 23809 [2018-10-23 18:21:20,879 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 18:21:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23809 states. [2018-10-23 18:21:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23809 to 23809. [2018-10-23 18:21:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23809 states. [2018-10-23 18:21:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23809 states to 23809 states and 25204 transitions. [2018-10-23 18:21:21,157 INFO L78 Accepts]: Start accepts. Automaton has 23809 states and 25204 transitions. Word has length 548 [2018-10-23 18:21:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:21,160 INFO L481 AbstractCegarLoop]: Abstraction has 23809 states and 25204 transitions. [2018-10-23 18:21:21,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:21:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 23809 states and 25204 transitions. [2018-10-23 18:21:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2018-10-23 18:21:21,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:21,171 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 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] [2018-10-23 18:21:21,172 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:21,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1898482885, now seen corresponding path program 1 times [2018-10-23 18:21:21,172 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:21,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:21,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:21,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:21,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2018-10-23 18:21:21,767 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:21:21,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:21:21,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:21:21,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:21:21,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:21:21,768 INFO L87 Difference]: Start difference. First operand 23809 states and 25204 transitions. Second operand 4 states. [2018-10-23 18:21:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:24,533 INFO L93 Difference]: Finished difference Result 50585 states and 53469 transitions. [2018-10-23 18:21:24,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:21:24,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 571 [2018-10-23 18:21:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:24,558 INFO L225 Difference]: With dead ends: 50585 [2018-10-23 18:21:24,558 INFO L226 Difference]: Without dead ends: 27108 [2018-10-23 18:21:24,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:21:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27108 states. [2018-10-23 18:21:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27108 to 23806. [2018-10-23 18:21:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23806 states. [2018-10-23 18:21:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23806 states to 23806 states and 24891 transitions. [2018-10-23 18:21:24,834 INFO L78 Accepts]: Start accepts. Automaton has 23806 states and 24891 transitions. Word has length 571 [2018-10-23 18:21:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:24,836 INFO L481 AbstractCegarLoop]: Abstraction has 23806 states and 24891 transitions. [2018-10-23 18:21:24,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:21:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 23806 states and 24891 transitions. [2018-10-23 18:21:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1364 [2018-10-23 18:21:24,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:24,892 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2018-10-23 18:21:24,892 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:24,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash 533836620, now seen corresponding path program 1 times [2018-10-23 18:21:24,893 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:24,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:24,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:24,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:24,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2927 backedges. 2056 proven. 0 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2018-10-23 18:21:26,617 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:21:26,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:21:26,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:21:26,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:21:26,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:21:26,620 INFO L87 Difference]: Start difference. First operand 23806 states and 24891 transitions. Second operand 4 states. [2018-10-23 18:21:28,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:28,698 INFO L93 Difference]: Finished difference Result 47275 states and 49410 transitions. [2018-10-23 18:21:28,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:21:28,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1363 [2018-10-23 18:21:28,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:28,726 INFO L225 Difference]: With dead ends: 47275 [2018-10-23 18:21:28,726 INFO L226 Difference]: Without dead ends: 23471 [2018-10-23 18:21:28,741 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 18:21:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23471 states. [2018-10-23 18:21:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23471 to 23141. [2018-10-23 18:21:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23141 states. [2018-10-23 18:21:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23141 states to 23141 states and 23922 transitions. [2018-10-23 18:21:28,995 INFO L78 Accepts]: Start accepts. Automaton has 23141 states and 23922 transitions. Word has length 1363 [2018-10-23 18:21:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:28,996 INFO L481 AbstractCegarLoop]: Abstraction has 23141 states and 23922 transitions. [2018-10-23 18:21:28,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:21:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 23141 states and 23922 transitions. [2018-10-23 18:21:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1365 [2018-10-23 18:21:29,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:29,039 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2018-10-23 18:21:29,040 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:29,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash -385920212, now seen corresponding path program 1 times [2018-10-23 18:21:29,042 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:29,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:29,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:29,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:29,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 2160 proven. 0 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2018-10-23 18:21:32,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:21:32,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-23 18:21:32,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:21:32,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:21:32,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:21:32,823 INFO L87 Difference]: Start difference. First operand 23141 states and 23922 transitions. Second operand 9 states. [2018-10-23 18:21:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:36,991 INFO L93 Difference]: Finished difference Result 46519 states and 48110 transitions. [2018-10-23 18:21:36,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 18:21:36,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1364 [2018-10-23 18:21:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:37,020 INFO L225 Difference]: With dead ends: 46519 [2018-10-23 18:21:37,020 INFO L226 Difference]: Without dead ends: 23380 [2018-10-23 18:21:37,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2018-10-23 18:21:37,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23380 states. [2018-10-23 18:21:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23380 to 21160. [2018-10-23 18:21:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21160 states. [2018-10-23 18:21:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21160 states to 21160 states and 21730 transitions. [2018-10-23 18:21:37,279 INFO L78 Accepts]: Start accepts. Automaton has 21160 states and 21730 transitions. Word has length 1364 [2018-10-23 18:21:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:37,281 INFO L481 AbstractCegarLoop]: Abstraction has 21160 states and 21730 transitions. [2018-10-23 18:21:37,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:21:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 21160 states and 21730 transitions. [2018-10-23 18:21:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1775 [2018-10-23 18:21:37,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:37,333 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2018-10-23 18:21:37,333 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:37,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1375269529, now seen corresponding path program 1 times [2018-10-23 18:21:37,336 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:37,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:37,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:37,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:37,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4982 backedges. 3529 proven. 0 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2018-10-23 18:21:40,719 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:21:40,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 18:21:40,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 18:21:40,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 18:21:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:21:40,721 INFO L87 Difference]: Start difference. First operand 21160 states and 21730 transitions. Second operand 6 states. [2018-10-23 18:21:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:43,233 INFO L93 Difference]: Finished difference Result 42982 states and 44140 transitions. [2018-10-23 18:21:43,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:21:43,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1774 [2018-10-23 18:21:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:43,254 INFO L225 Difference]: With dead ends: 42982 [2018-10-23 18:21:43,254 INFO L226 Difference]: Without dead ends: 21824 [2018-10-23 18:21:43,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:21:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21824 states. [2018-10-23 18:21:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21824 to 21490. [2018-10-23 18:21:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21490 states. [2018-10-23 18:21:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21490 states to 21490 states and 22068 transitions. [2018-10-23 18:21:43,446 INFO L78 Accepts]: Start accepts. Automaton has 21490 states and 22068 transitions. Word has length 1774 [2018-10-23 18:21:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:43,447 INFO L481 AbstractCegarLoop]: Abstraction has 21490 states and 22068 transitions. [2018-10-23 18:21:43,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 18:21:43,447 INFO L276 IsEmpty]: Start isEmpty. Operand 21490 states and 22068 transitions. [2018-10-23 18:21:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2033 [2018-10-23 18:21:43,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:43,486 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:43,486 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:43,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:43,487 INFO L82 PathProgramCache]: Analyzing trace with hash -802222378, now seen corresponding path program 1 times [2018-10-23 18:21:43,487 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:43,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:43,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:43,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:43,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 2793 proven. 243 refuted. 0 times theorem prover too weak. 3718 trivial. 0 not checked. [2018-10-23 18:21:49,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:21:49,465 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 18:21:49,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:49,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:21:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 2793 proven. 0 refuted. 0 times theorem prover too weak. 3961 trivial. 0 not checked. [2018-10-23 18:21:52,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:21:52,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-23 18:21:52,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:21:52,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:21:52,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:21:52,960 INFO L87 Difference]: Start difference. First operand 21490 states and 22068 transitions. Second operand 10 states. [2018-10-23 18:22:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:01,527 INFO L93 Difference]: Finished difference Result 45625 states and 46810 transitions. [2018-10-23 18:22:01,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 18:22:01,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2032 [2018-10-23 18:22:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:01,547 INFO L225 Difference]: With dead ends: 45625 [2018-10-23 18:22:01,547 INFO L226 Difference]: Without dead ends: 24137 [2018-10-23 18:22:01,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2048 GetRequests, 2031 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-10-23 18:22:01,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24137 states. [2018-10-23 18:22:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24137 to 21490. [2018-10-23 18:22:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21490 states. [2018-10-23 18:22:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21490 states to 21490 states and 22060 transitions. [2018-10-23 18:22:01,827 INFO L78 Accepts]: Start accepts. Automaton has 21490 states and 22060 transitions. Word has length 2032 [2018-10-23 18:22:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:01,827 INFO L481 AbstractCegarLoop]: Abstraction has 21490 states and 22060 transitions. [2018-10-23 18:22:01,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:22:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 21490 states and 22060 transitions. [2018-10-23 18:22:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2064 [2018-10-23 18:22:01,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:01,859 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:01,859 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:01,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash -16334730, now seen corresponding path program 1 times [2018-10-23 18:22:01,860 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:01,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:01,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:01,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:01,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:02,784 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-10-23 18:22:03,098 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-23 18:22:03,461 WARN L179 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-23 18:22:03,704 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2018-10-23 18:22:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7426 backedges. 2661 proven. 158 refuted. 0 times theorem prover too weak. 4607 trivial. 0 not checked. [2018-10-23 18:22:06,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:22:06,583 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 18:22:06,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:07,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:22:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7426 backedges. 2819 proven. 0 refuted. 0 times theorem prover too weak. 4607 trivial. 0 not checked. [2018-10-23 18:22:09,386 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:22:09,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-23 18:22:09,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:22:09,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:22:09,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:22:09,389 INFO L87 Difference]: Start difference. First operand 21490 states and 22060 transitions. Second operand 10 states. [2018-10-23 18:22:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:18,612 INFO L93 Difference]: Finished difference Result 55172 states and 56618 transitions. [2018-10-23 18:22:18,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 18:22:18,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2063 [2018-10-23 18:22:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:18,649 INFO L225 Difference]: With dead ends: 55172 [2018-10-23 18:22:18,649 INFO L226 Difference]: Without dead ends: 33684 [2018-10-23 18:22:18,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2093 GetRequests, 2073 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-10-23 18:22:18,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33684 states. [2018-10-23 18:22:18,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33684 to 26701. [2018-10-23 18:22:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26701 states. [2018-10-23 18:22:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26701 states to 26701 states and 27309 transitions. [2018-10-23 18:22:18,961 INFO L78 Accepts]: Start accepts. Automaton has 26701 states and 27309 transitions. Word has length 2063 [2018-10-23 18:22:18,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:18,962 INFO L481 AbstractCegarLoop]: Abstraction has 26701 states and 27309 transitions. [2018-10-23 18:22:18,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:22:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 26701 states and 27309 transitions. [2018-10-23 18:22:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2125 [2018-10-23 18:22:19,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:19,011 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:19,011 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:19,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1055198405, now seen corresponding path program 1 times [2018-10-23 18:22:19,012 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:19,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:19,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:19,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:19,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:20,280 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:22:20,449 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 18:22:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7734 backedges. 3547 proven. 251 refuted. 0 times theorem prover too weak. 3936 trivial. 0 not checked. [2018-10-23 18:22:25,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:22:25,261 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:22:25,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:25,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:22:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7734 backedges. 4284 proven. 0 refuted. 0 times theorem prover too weak. 3450 trivial. 0 not checked. [2018-10-23 18:22:28,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:22:28,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2018-10-23 18:22:28,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:22:28,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:22:28,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:22:28,013 INFO L87 Difference]: Start difference. First operand 26701 states and 27309 transitions. Second operand 9 states. [2018-10-23 18:22:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:35,859 INFO L93 Difference]: Finished difference Result 57319 states and 58689 transitions. [2018-10-23 18:22:35,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 18:22:35,859 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2124 [2018-10-23 18:22:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:35,890 INFO L225 Difference]: With dead ends: 57319 [2018-10-23 18:22:35,890 INFO L226 Difference]: Without dead ends: 30620 [2018-10-23 18:22:35,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2143 GetRequests, 2127 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-23 18:22:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30620 states. [2018-10-23 18:22:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30620 to 30138. [2018-10-23 18:22:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30138 states. [2018-10-23 18:22:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30138 states to 30138 states and 30770 transitions. [2018-10-23 18:22:36,188 INFO L78 Accepts]: Start accepts. Automaton has 30138 states and 30770 transitions. Word has length 2124 [2018-10-23 18:22:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:36,189 INFO L481 AbstractCegarLoop]: Abstraction has 30138 states and 30770 transitions. [2018-10-23 18:22:36,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:22:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 30138 states and 30770 transitions. [2018-10-23 18:22:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2436 [2018-10-23 18:22:36,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:36,243 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-10-23 18:22:36,244 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:36,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:36,245 INFO L82 PathProgramCache]: Analyzing trace with hash 223387130, now seen corresponding path program 1 times [2018-10-23 18:22:36,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:36,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:36,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:36,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:36,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:38,659 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 18:22:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9925 backedges. 4969 proven. 572 refuted. 0 times theorem prover too weak. 4384 trivial. 0 not checked. [2018-10-23 18:22:42,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:22:42,902 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:22:42,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:43,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:22:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9925 backedges. 5074 proven. 467 refuted. 0 times theorem prover too weak. 4384 trivial. 0 not checked. [2018-10-23 18:22:47,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:22:47,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2018-10-23 18:22:47,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:22:47,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:22:47,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:22:47,105 INFO L87 Difference]: Start difference. First operand 30138 states and 30770 transitions. Second operand 9 states. [2018-10-23 18:22:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:52,726 INFO L93 Difference]: Finished difference Result 60403 states and 61663 transitions. [2018-10-23 18:22:52,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 18:22:52,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2435 [2018-10-23 18:22:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:52,754 INFO L225 Difference]: With dead ends: 60403 [2018-10-23 18:22:52,754 INFO L226 Difference]: Without dead ends: 31257 [2018-10-23 18:22:52,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2448 GetRequests, 2435 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-23 18:22:52,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31257 states. [2018-10-23 18:22:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31257 to 29891. [2018-10-23 18:22:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29891 states. [2018-10-23 18:22:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29891 states to 29891 states and 30437 transitions. [2018-10-23 18:22:53,037 INFO L78 Accepts]: Start accepts. Automaton has 29891 states and 30437 transitions. Word has length 2435 [2018-10-23 18:22:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:53,038 INFO L481 AbstractCegarLoop]: Abstraction has 29891 states and 30437 transitions. [2018-10-23 18:22:53,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:22:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 29891 states and 30437 transitions. [2018-10-23 18:22:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2458 [2018-10-23 18:22:53,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:53,077 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-10-23 18:22:53,077 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:53,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1470984143, now seen corresponding path program 1 times [2018-10-23 18:22:53,078 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:53,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:53,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:53,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:53,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10083 backedges. 6953 proven. 889 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2018-10-23 18:23:01,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:23:01,478 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:23:01,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:02,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:23:12,701 WARN L179 SmtUtils]: Spent 10.29 s on a formula simplification. DAG size of input: 432 DAG size of output: 27 [2018-10-23 18:23:13,363 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-10-23 18:23:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10083 backedges. 7832 proven. 10 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2018-10-23 18:23:24,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:23:24,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-23 18:23:24,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 18:23:24,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 18:23:24,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-10-23 18:23:24,321 INFO L87 Difference]: Start difference. First operand 29891 states and 30437 transitions. Second operand 13 states. [2018-10-23 18:23:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:23:34,860 INFO L93 Difference]: Finished difference Result 80955 states and 82396 transitions. [2018-10-23 18:23:34,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 18:23:34,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 2457 [2018-10-23 18:23:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:23:34,911 INFO L225 Difference]: With dead ends: 80955 [2018-10-23 18:23:34,911 INFO L226 Difference]: Without dead ends: 52056 [2018-10-23 18:23:34,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2490 GetRequests, 2386 SyntacticMatches, 81 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2018-10-23 18:23:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52056 states. [2018-10-23 18:23:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52056 to 31528. [2018-10-23 18:23:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31528 states. [2018-10-23 18:23:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31528 states to 31528 states and 32008 transitions. [2018-10-23 18:23:35,320 INFO L78 Accepts]: Start accepts. Automaton has 31528 states and 32008 transitions. Word has length 2457 [2018-10-23 18:23:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:23:35,322 INFO L481 AbstractCegarLoop]: Abstraction has 31528 states and 32008 transitions. [2018-10-23 18:23:35,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 18:23:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31528 states and 32008 transitions. [2018-10-23 18:23:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2679 [2018-10-23 18:23:35,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:23:35,389 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-10-23 18:23:35,390 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:23:35,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:23:35,390 INFO L82 PathProgramCache]: Analyzing trace with hash 342412550, now seen corresponding path program 1 times [2018-10-23 18:23:35,390 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:23:35,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:23:35,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:35,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:35,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12206 backedges. 8936 proven. 1277 refuted. 0 times theorem prover too weak. 1993 trivial. 0 not checked. [2018-10-23 18:23:45,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:23:45,793 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:23:45,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:46,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:23:47,697 WARN L179 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2018-10-23 18:23:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12206 backedges. 9150 proven. 816 refuted. 0 times theorem prover too weak. 2240 trivial. 0 not checked. [2018-10-23 18:23:54,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:23:54,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-10-23 18:23:54,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 18:23:54,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 18:23:54,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-23 18:23:54,741 INFO L87 Difference]: Start difference. First operand 31528 states and 32008 transitions. Second operand 13 states. Received shutdown request... [2018-10-23 18:24:06,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 18:24:06,701 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 18:24:06,708 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 18:24:06,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:24:06 BoogieIcfgContainer [2018-10-23 18:24:06,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 18:24:06,709 INFO L168 Benchmark]: Toolchain (without parser) took 229170.40 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.6 GB in the end (delta: -2.1 GB). Peak memory consumption was 449.9 MB. Max. memory is 7.1 GB. [2018-10-23 18:24:06,710 INFO L168 Benchmark]: CDTParser took 0.27 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 18:24:06,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1071.85 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-23 18:24:06,711 INFO L168 Benchmark]: Boogie Procedure Inliner took 334.39 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -841.4 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2018-10-23 18:24:06,712 INFO L168 Benchmark]: Boogie Preprocessor took 169.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. [2018-10-23 18:24:06,712 INFO L168 Benchmark]: RCFGBuilder took 6854.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 268.6 MB). Peak memory consumption was 268.6 MB. Max. memory is 7.1 GB. [2018-10-23 18:24:06,713 INFO L168 Benchmark]: TraceAbstraction took 220728.16 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 3.6 GB in the end (delta: -1.7 GB). Peak memory consumption was 175.3 MB. Max. memory is 7.1 GB. [2018-10-23 18:24:06,718 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 1071.85 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 334.39 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -841.4 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 169.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6854.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 268.6 MB). Peak memory consumption was 268.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220728.16 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 3.6 GB in the end (delta: -1.7 GB). Peak memory consumption was 175.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 46). Cancelled while BasicCegarLoop was constructing difference of abstraction (31528states) and FLOYD_HOARE automaton (currently 13 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (17884 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 397 locations, 1 error locations. TIMEOUT Result, 220.6s OverallTime, 19 OverallIterations, 13 TraceHistogramMax, 112.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4839 SDtfs, 26164 SDslu, 3156 SDs, 0 SdLazy, 82188 SolverSat, 5740 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 90.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14430 GetRequests, 14175 SyntacticMatches, 103 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 23.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31528occurred in iteration=18, 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: 4.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 41587 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 60.5s InterpolantComputationTime, 35575 NumberOfCodeBlocks, 35575 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 35549 ConstructedInterpolants, 534 QuantifiedInterpolants, 317008903 SizeOfPredicates, 15 NumberOfNonLiveVariables, 16201 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 26 InterpolantComputations, 16 PerfectInterpolantSequences, 116593/121406 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown