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/Problem17_label41_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:49:52,636 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:49:52,640 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:49:52,652 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:49:52,652 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:49:52,653 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:49:52,654 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:49:52,656 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:49:52,658 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:49:52,659 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:49:52,660 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:49:52,660 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:49:52,661 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:49:52,662 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:49:52,663 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:49:52,664 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:49:52,665 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:49:52,667 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:49:52,669 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:49:52,670 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:49:52,671 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:49:52,673 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:49:52,675 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:49:52,675 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:49:52,676 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:49:52,676 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:49:52,678 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:49:52,678 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:49:52,679 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:49:52,680 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:49:52,681 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:49:52,681 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 16:49:52,681 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 16:49:52,682 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 16:49:52,683 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 16:49:52,683 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 16:49:52,684 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 [2018-10-24 16:49:52,712 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:49:52,713 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:49:52,714 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:49:52,714 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:49:52,718 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:49:52,718 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:49:52,718 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:49:52,718 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:49:52,719 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:49:52,719 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:49:52,719 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:49:52,719 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:49:52,719 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:49:52,719 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:49:52,720 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:49:52,720 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:49:52,720 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:49:52,721 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:49:52,721 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:49:52,721 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:49:52,721 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:49:52,721 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:49:52,722 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:49:52,722 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:49:52,722 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:49:52,722 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:49:52,722 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:49:52,723 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:49:52,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:49:52,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:49:52,805 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:49:52,807 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:49:52,807 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:49:52,808 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label41_true-unreach-call.c [2018-10-24 16:49:52,877 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9aec0fbb0/b4645c58bbab45339369bb5276ce0cf7/FLAGe64346567 [2018-10-24 16:49:53,606 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:49:53,607 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label41_true-unreach-call.c [2018-10-24 16:49:53,631 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9aec0fbb0/b4645c58bbab45339369bb5276ce0cf7/FLAGe64346567 [2018-10-24 16:49:53,648 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9aec0fbb0/b4645c58bbab45339369bb5276ce0cf7 [2018-10-24 16:49:53,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:49:53,664 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:49:53,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:49:53,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:49:53,669 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:49:53,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:49:53" (1/1) ... [2018-10-24 16:49:53,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8de4687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:53, skipping insertion in model container [2018-10-24 16:49:53,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:49:53" (1/1) ... [2018-10-24 16:49:53,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:49:53,813 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:49:54,810 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:49:54,816 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:49:55,219 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:49:55,245 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:49:55,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55 WrapperNode [2018-10-24 16:49:55,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:49:55,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:49:55,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:49:55,247 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:49:55,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (1/1) ... [2018-10-24 16:49:55,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (1/1) ... [2018-10-24 16:49:55,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:49:55,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:49:55,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:49:55,785 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:49:55,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (1/1) ... [2018-10-24 16:49:55,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (1/1) ... [2018-10-24 16:49:55,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (1/1) ... [2018-10-24 16:49:55,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (1/1) ... [2018-10-24 16:49:55,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (1/1) ... [2018-10-24 16:49:55,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (1/1) ... [2018-10-24 16:49:56,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (1/1) ... [2018-10-24 16:49:56,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:49:56,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:49:56,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:49:56,084 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:49:56,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (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 [2018-10-24 16:49:56,145 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:49:56,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:49:56,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:50:07,412 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:50:07,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:50:07 BoogieIcfgContainer [2018-10-24 16:50:07,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:50:07,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:50:07,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:50:07,418 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:50:07,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:49:53" (1/3) ... [2018-10-24 16:50:07,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e23a5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:50:07, skipping insertion in model container [2018-10-24 16:50:07,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:49:55" (2/3) ... [2018-10-24 16:50:07,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e23a5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:50:07, skipping insertion in model container [2018-10-24 16:50:07,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:50:07" (3/3) ... [2018-10-24 16:50:07,422 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label41_true-unreach-call.c [2018-10-24 16:50:07,431 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:50:07,441 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:50:07,458 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:50:07,499 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:50:07,500 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:50:07,500 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:50:07,500 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:50:07,500 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:50:07,500 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:50:07,501 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:50:07,501 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:50:07,501 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:50:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2018-10-24 16:50:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 16:50:07,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:07,541 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:50:07,544 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:07,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1433927590, now seen corresponding path program 1 times [2018-10-24 16:50:07,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:07,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:07,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:07,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:07,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:50:07,923 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:07,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:50:07,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:50:07,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:50:07,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:50:07,948 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 4 states. [2018-10-24 16:50:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:18,663 INFO L93 Difference]: Finished difference Result 2126 states and 3956 transitions. [2018-10-24 16:50:18,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:50:18,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-10-24 16:50:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:18,707 INFO L225 Difference]: With dead ends: 2126 [2018-10-24 16:50:18,707 INFO L226 Difference]: Without dead ends: 1528 [2018-10-24 16:50:18,714 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 [2018-10-24 16:50:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2018-10-24 16:50:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1048. [2018-10-24 16:50:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-10-24 16:50:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1826 transitions. [2018-10-24 16:50:18,844 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1826 transitions. Word has length 35 [2018-10-24 16:50:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:18,844 INFO L481 AbstractCegarLoop]: Abstraction has 1048 states and 1826 transitions. [2018-10-24 16:50:18,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:50:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1826 transitions. [2018-10-24 16:50:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-24 16:50:18,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:18,853 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:50:18,853 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:18,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash -950653749, now seen corresponding path program 1 times [2018-10-24 16:50:18,854 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:18,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:18,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:18,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:18,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:50:19,163 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:19,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:50:19,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:50:19,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:50:19,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:50:19,165 INFO L87 Difference]: Start difference. First operand 1048 states and 1826 transitions. Second operand 4 states. [2018-10-24 16:50:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:30,445 INFO L93 Difference]: Finished difference Result 3810 states and 6822 transitions. [2018-10-24 16:50:30,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:50:30,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2018-10-24 16:50:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:30,461 INFO L225 Difference]: With dead ends: 3810 [2018-10-24 16:50:30,461 INFO L226 Difference]: Without dead ends: 2764 [2018-10-24 16:50:30,464 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 [2018-10-24 16:50:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2018-10-24 16:50:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2018-10-24 16:50:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2764 states. [2018-10-24 16:50:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 4043 transitions. [2018-10-24 16:50:30,522 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 4043 transitions. Word has length 107 [2018-10-24 16:50:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:30,522 INFO L481 AbstractCegarLoop]: Abstraction has 2764 states and 4043 transitions. [2018-10-24 16:50:30,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:50:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 4043 transitions. [2018-10-24 16:50:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-24 16:50:30,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:30,528 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:50:30,528 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:30,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:30,529 INFO L82 PathProgramCache]: Analyzing trace with hash 828676186, now seen corresponding path program 1 times [2018-10-24 16:50:30,529 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:30,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:30,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:30,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:30,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-24 16:50:30,804 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:30,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:50:30,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:50:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:50:30,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:50:30,805 INFO L87 Difference]: Start difference. First operand 2764 states and 4043 transitions. Second operand 3 states. [2018-10-24 16:50:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:37,091 INFO L93 Difference]: Finished difference Result 8080 states and 11868 transitions. [2018-10-24 16:50:37,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:50:37,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2018-10-24 16:50:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:37,117 INFO L225 Difference]: With dead ends: 8080 [2018-10-24 16:50:37,118 INFO L226 Difference]: Without dead ends: 5318 [2018-10-24 16:50:37,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:50:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5318 states. [2018-10-24 16:50:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5318 to 5318. [2018-10-24 16:50:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5318 states. [2018-10-24 16:50:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 6872 transitions. [2018-10-24 16:50:37,214 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 6872 transitions. Word has length 191 [2018-10-24 16:50:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:37,215 INFO L481 AbstractCegarLoop]: Abstraction has 5318 states and 6872 transitions. [2018-10-24 16:50:37,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:50:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 6872 transitions. [2018-10-24 16:50:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-24 16:50:37,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:37,219 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:50:37,219 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:37,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash 920189744, now seen corresponding path program 1 times [2018-10-24 16:50:37,220 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:37,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:37,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:37,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:37,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:50:37,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:37,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:50:37,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:50:37,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:50:37,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:50:37,561 INFO L87 Difference]: Start difference. First operand 5318 states and 6872 transitions. Second operand 4 states. [2018-10-24 16:50:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:42,392 INFO L93 Difference]: Finished difference Result 11486 states and 14992 transitions. [2018-10-24 16:50:42,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:50:42,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 198 [2018-10-24 16:50:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:42,419 INFO L225 Difference]: With dead ends: 11486 [2018-10-24 16:50:42,419 INFO L226 Difference]: Without dead ends: 6170 [2018-10-24 16:50:42,427 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 [2018-10-24 16:50:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6170 states. [2018-10-24 16:50:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6170 to 6170. [2018-10-24 16:50:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6170 states. [2018-10-24 16:50:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 7379 transitions. [2018-10-24 16:50:42,536 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 7379 transitions. Word has length 198 [2018-10-24 16:50:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:42,536 INFO L481 AbstractCegarLoop]: Abstraction has 6170 states and 7379 transitions. [2018-10-24 16:50:42,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:50:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 7379 transitions. [2018-10-24 16:50:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-24 16:50:42,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:42,542 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:50:42,543 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:42,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1919608372, now seen corresponding path program 1 times [2018-10-24 16:50:42,543 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:42,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:42,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:42,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:42,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-24 16:50:42,921 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:50:42,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:50:42,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:50:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:50:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:50:42,923 INFO L87 Difference]: Start difference. First operand 6170 states and 7379 transitions. Second operand 4 states. [2018-10-24 16:50:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:50:50,832 INFO L93 Difference]: Finished difference Result 15787 states and 19066 transitions. [2018-10-24 16:50:50,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:50:50,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 257 [2018-10-24 16:50:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:50:50,865 INFO L225 Difference]: With dead ends: 15787 [2018-10-24 16:50:50,865 INFO L226 Difference]: Without dead ends: 9619 [2018-10-24 16:50:50,872 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 [2018-10-24 16:50:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9619 states. [2018-10-24 16:50:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9619 to 8309. [2018-10-24 16:50:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8309 states. [2018-10-24 16:50:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8309 states to 8309 states and 9781 transitions. [2018-10-24 16:50:50,999 INFO L78 Accepts]: Start accepts. Automaton has 8309 states and 9781 transitions. Word has length 257 [2018-10-24 16:50:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:50:51,000 INFO L481 AbstractCegarLoop]: Abstraction has 8309 states and 9781 transitions. [2018-10-24 16:50:51,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:50:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 8309 states and 9781 transitions. [2018-10-24 16:50:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-24 16:50:51,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:50:51,005 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:50:51,006 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:50:51,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:50:51,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2097900786, now seen corresponding path program 1 times [2018-10-24 16:50:51,006 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:50:51,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:50:51,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:51,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:51,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:50:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 206 proven. 71 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 16:50:51,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:50:51,585 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 [2018-10-24 16:50:51,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:50:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:50:51,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:50:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 206 proven. 71 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 16:50:52,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:50:52,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-24 16:50:52,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:50:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:50:52,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:50:52,043 INFO L87 Difference]: Start difference. First operand 8309 states and 9781 transitions. Second operand 5 states. [2018-10-24 16:51:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:51:01,464 INFO L93 Difference]: Finished difference Result 25598 states and 30810 transitions. [2018-10-24 16:51:01,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:51:01,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 262 [2018-10-24 16:51:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:51:01,506 INFO L225 Difference]: With dead ends: 25598 [2018-10-24 16:51:01,507 INFO L226 Difference]: Without dead ends: 15099 [2018-10-24 16:51:01,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 260 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:51:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15099 states. [2018-10-24 16:51:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15099 to 13389. [2018-10-24 16:51:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13389 states. [2018-10-24 16:51:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13389 states to 13389 states and 14998 transitions. [2018-10-24 16:51:01,748 INFO L78 Accepts]: Start accepts. Automaton has 13389 states and 14998 transitions. Word has length 262 [2018-10-24 16:51:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:51:01,748 INFO L481 AbstractCegarLoop]: Abstraction has 13389 states and 14998 transitions. [2018-10-24 16:51:01,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:51:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 13389 states and 14998 transitions. [2018-10-24 16:51:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-24 16:51:01,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:51:01,755 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:51:01,755 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:51:01,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:51:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash -914177385, now seen corresponding path program 1 times [2018-10-24 16:51:01,755 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:51:01,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:51:01,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:01,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:01,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:02,171 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 3 [2018-10-24 16:51:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-10-24 16:51:02,218 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:51:02,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:51:02,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:51:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:51:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:51:02,219 INFO L87 Difference]: Start difference. First operand 13389 states and 14998 transitions. Second operand 4 states. [2018-10-24 16:51:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:51:08,609 INFO L93 Difference]: Finished difference Result 36602 states and 41054 transitions. [2018-10-24 16:51:08,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:51:08,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 298 [2018-10-24 16:51:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:51:08,647 INFO L225 Difference]: With dead ends: 36602 [2018-10-24 16:51:08,648 INFO L226 Difference]: Without dead ends: 22779 [2018-10-24 16:51:08,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:51:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22779 states. [2018-10-24 16:51:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22779 to 18076. [2018-10-24 16:51:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18076 states. [2018-10-24 16:51:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18076 states to 18076 states and 19984 transitions. [2018-10-24 16:51:08,871 INFO L78 Accepts]: Start accepts. Automaton has 18076 states and 19984 transitions. Word has length 298 [2018-10-24 16:51:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:51:08,872 INFO L481 AbstractCegarLoop]: Abstraction has 18076 states and 19984 transitions. [2018-10-24 16:51:08,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:51:08,872 INFO L276 IsEmpty]: Start isEmpty. Operand 18076 states and 19984 transitions. [2018-10-24 16:51:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2018-10-24 16:51:08,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:51:08,890 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2018-10-24 16:51:08,890 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:51:08,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:51:08,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1544866570, now seen corresponding path program 1 times [2018-10-24 16:51:08,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:51:08,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:51:08,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:08,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:08,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:51:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 498 proven. 83 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2018-10-24 16:51:09,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:51:09,684 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 [2018-10-24 16:51:09,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:51:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:51:09,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:51:10,194 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2018-10-24 16:51:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 591 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-10-24 16:51:10,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:51:10,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2018-10-24 16:51:10,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:51:10,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:51:10,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:51:10,517 INFO L87 Difference]: Start difference. First operand 18076 states and 19984 transitions. Second operand 7 states. [2018-10-24 16:52:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:33,025 INFO L93 Difference]: Finished difference Result 87792 states and 96701 transitions. [2018-10-24 16:52:33,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:52:33,026 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 441 [2018-10-24 16:52:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:33,098 INFO L225 Difference]: With dead ends: 87792 [2018-10-24 16:52:33,098 INFO L226 Difference]: Without dead ends: 61155 [2018-10-24 16:52:33,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:52:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61155 states. [2018-10-24 16:52:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61155 to 53455. [2018-10-24 16:52:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53455 states. [2018-10-24 16:52:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53455 states to 53455 states and 57026 transitions. [2018-10-24 16:52:34,210 INFO L78 Accepts]: Start accepts. Automaton has 53455 states and 57026 transitions. Word has length 441 [2018-10-24 16:52:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:34,210 INFO L481 AbstractCegarLoop]: Abstraction has 53455 states and 57026 transitions. [2018-10-24 16:52:34,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:52:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 53455 states and 57026 transitions. [2018-10-24 16:52:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-10-24 16:52:34,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:34,240 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:52:34,240 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:34,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:34,241 INFO L82 PathProgramCache]: Analyzing trace with hash 502496031, now seen corresponding path program 1 times [2018-10-24 16:52:34,241 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:34,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:34,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:34,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:34,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2018-10-24 16:52:34,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:52:34,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:52:34,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:52:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:52:34,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:52:34,831 INFO L87 Difference]: Start difference. First operand 53455 states and 57026 transitions. Second operand 5 states. [2018-10-24 16:52:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:52:44,341 INFO L93 Difference]: Finished difference Result 136798 states and 146915 transitions. [2018-10-24 16:52:44,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:52:44,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 507 [2018-10-24 16:52:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:52:44,448 INFO L225 Difference]: With dead ends: 136798 [2018-10-24 16:52:44,449 INFO L226 Difference]: Without dead ends: 84628 [2018-10-24 16:52:44,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:52:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84628 states. [2018-10-24 16:52:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84628 to 62013. [2018-10-24 16:52:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62013 states. [2018-10-24 16:52:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62013 states to 62013 states and 66191 transitions. [2018-10-24 16:52:45,767 INFO L78 Accepts]: Start accepts. Automaton has 62013 states and 66191 transitions. Word has length 507 [2018-10-24 16:52:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:52:45,768 INFO L481 AbstractCegarLoop]: Abstraction has 62013 states and 66191 transitions. [2018-10-24 16:52:45,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:52:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 62013 states and 66191 transitions. [2018-10-24 16:52:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-10-24 16:52:45,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:52:45,791 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:52:45,791 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:52:45,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:52:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash -442904605, now seen corresponding path program 1 times [2018-10-24 16:52:45,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:52:45,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:52:45,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:45,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:45,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:52:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 33 proven. 528 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-10-24 16:52:46,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:52:46,561 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 [2018-10-24 16:52:46,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:52:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:52:46,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:53:03,776 WARN L179 SmtUtils]: Spent 16.95 s on a formula simplification. DAG size of input: 120 DAG size of output: 62 [2018-10-24 16:53:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-24 16:53:07,391 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:53:07,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 16:53:07,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:53:07,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:53:07,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:53:07,394 INFO L87 Difference]: Start difference. First operand 62013 states and 66191 transitions. Second operand 8 states. [2018-10-24 16:53:53,796 WARN L179 SmtUtils]: Spent 10.02 s on a formula simplification. DAG size of input: 66 DAG size of output: 52 Received shutdown request... [2018-10-24 16:54:10,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 16:54:10,500 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:54:10,505 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:54:10,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:54:10 BoogieIcfgContainer [2018-10-24 16:54:10,505 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:54:10,506 INFO L168 Benchmark]: Toolchain (without parser) took 256843.94 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-10-24 16:54:10,507 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:54:10,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1581.22 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:54:10,509 INFO L168 Benchmark]: Boogie Procedure Inliner took 537.54 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -896.0 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:54:10,510 INFO L168 Benchmark]: Boogie Preprocessor took 298.67 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: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:54:10,510 INFO L168 Benchmark]: RCFGBuilder took 11330.54 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 470.4 MB). Peak memory consumption was 470.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:54:10,511 INFO L168 Benchmark]: TraceAbstraction took 243090.63 ms. Allocated memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: 1.4 GB). Free memory was 1.7 GB in the beginning and 3.2 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-24 16:54:10,517 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1581.22 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 537.54 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -896.0 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 298.67 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: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11330.54 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 470.4 MB). Peak memory consumption was 470.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243090.63 ms. Allocated memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: 1.4 GB). Free memory was 1.7 GB in the beginning and 3.2 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 110). Cancelled while BasicCegarLoop was constructing difference of abstraction (62013states) and FLOYD_HOARE automaton (currently 8 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (2267 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 591 locations, 1 error locations. TIMEOUT Result, 243.0s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 212.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4188 SDtfs, 13767 SDslu, 2061 SDs, 0 SdLazy, 35966 SolverSat, 6186 SolverUnsat, 38 SolverUnknown, 0 SolverNotchecked, 190.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1263 GetRequests, 1224 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 29.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62013occurred in iteration=9, 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: 3.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 38518 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 24.8s InterpolantComputationTime, 4015 NumberOfCodeBlocks, 4015 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 4002 ConstructedInterpolants, 240 QuantifiedInterpolants, 20251869 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1631 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 4353/5106 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown