./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 10:07:47,086 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 10:07:47,088 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 10:07:47,102 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 10:07:47,102 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 10:07:47,103 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 10:07:47,105 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 10:07:47,107 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 10:07:47,109 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 10:07:47,110 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 10:07:47,111 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 10:07:47,111 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 10:07:47,112 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 10:07:47,114 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 10:07:47,115 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 10:07:47,116 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 10:07:47,117 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 10:07:47,119 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 10:07:47,122 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 10:07:47,123 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 10:07:47,125 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 10:07:47,126 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 10:07:47,129 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 10:07:47,130 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 10:07:47,130 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 10:07:47,131 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 10:07:47,133 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 10:07:47,134 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 10:07:47,135 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 10:07:47,137 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 10:07:47,137 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 10:07:47,138 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 10:07:47,138 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 10:07:47,138 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 10:07:47,140 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 10:07:47,141 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 10:07:47,141 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 10:07:47,157 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 10:07:47,158 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 10:07:47,159 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 10:07:47,159 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 10:07:47,159 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 10:07:47,159 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 10:07:47,160 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 10:07:47,160 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 10:07:47,161 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 10:07:47,161 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 10:07:47,161 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 10:07:47,161 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 10:07:47,161 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 10:07:47,161 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 10:07:47,162 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 10:07:47,162 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 10:07:47,162 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 10:07:47,162 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 10:07:47,162 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 10:07:47,162 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 10:07:47,164 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 10:07:47,165 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:07:47,165 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 10:07:47,165 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 10:07:47,165 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 10:07:47,165 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 10:07:47,165 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 10:07:47,166 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 10:07:47,167 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 [2018-12-31 10:07:47,227 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 10:07:47,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 10:07:47,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 10:07:47,249 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 10:07:47,250 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 10:07:47,250 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c [2018-12-31 10:07:47,318 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b4fdbf7/8357f9d7af4144cbb74b4ec4ac4bf522/FLAGbca8b7053 [2018-12-31 10:07:47,806 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 10:07:47,807 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c [2018-12-31 10:07:47,813 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b4fdbf7/8357f9d7af4144cbb74b4ec4ac4bf522/FLAGbca8b7053 [2018-12-31 10:07:48,147 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b4fdbf7/8357f9d7af4144cbb74b4ec4ac4bf522 [2018-12-31 10:07:48,152 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 10:07:48,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 10:07:48,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:48,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 10:07:48,161 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 10:07:48,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7128d6b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48, skipping insertion in model container [2018-12-31 10:07:48,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 10:07:48,196 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 10:07:48,408 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:48,413 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 10:07:48,433 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:48,452 INFO L195 MainTranslator]: Completed translation [2018-12-31 10:07:48,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48 WrapperNode [2018-12-31 10:07:48,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:48,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:48,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 10:07:48,454 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 10:07:48,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:48,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 10:07:48,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 10:07:48,497 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 10:07:48,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... [2018-12-31 10:07:48,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 10:07:48,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 10:07:48,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 10:07:48,520 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 10:07:48,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:48,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 10:07:48,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 10:07:48,659 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-12-31 10:07:48,660 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-12-31 10:07:48,883 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 10:07:48,883 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 10:07:48,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:48 BoogieIcfgContainer [2018-12-31 10:07:48,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 10:07:48,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 10:07:48,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 10:07:48,888 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 10:07:48,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 10:07:48" (1/3) ... [2018-12-31 10:07:48,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5510bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:48, skipping insertion in model container [2018-12-31 10:07:48,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:48" (2/3) ... [2018-12-31 10:07:48,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5510bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:48, skipping insertion in model container [2018-12-31 10:07:48,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:48" (3/3) ... [2018-12-31 10:07:48,892 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0_true-unreach-call_true-termination.c [2018-12-31 10:07:48,902 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 10:07:48,909 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 10:07:48,924 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 10:07:48,957 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 10:07:48,958 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 10:07:48,958 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 10:07:48,958 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 10:07:48,958 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 10:07:48,958 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 10:07:48,958 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 10:07:48,958 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 10:07:48,959 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 10:07:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-31 10:07:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 10:07:48,986 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:48,987 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:48,989 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:48,995 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2018-12-31 10:07:48,998 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:48,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:49,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:49,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 10:07:49,331 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:07:49,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:07:49,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:07:49,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:07:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:49,358 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2018-12-31 10:07:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:49,513 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-31 10:07:49,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:07:49,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 10:07:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:49,526 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:07:49,526 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 10:07:49,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 10:07:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-31 10:07:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 10:07:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-31 10:07:49,574 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-12-31 10:07:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:49,575 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-31 10:07:49,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:07:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-31 10:07:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-31 10:07:49,578 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:49,578 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:49,578 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2018-12-31 10:07:49,579 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:49,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:49,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:49,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:07:49,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:49,689 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:49,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:49,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:07:49,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:49,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 10:07:49,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 10:07:49,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 10:07:49,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:49,816 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2018-12-31 10:07:50,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:50,155 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-31 10:07:50,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 10:07:50,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-12-31 10:07:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:50,157 INFO L225 Difference]: With dead ends: 21 [2018-12-31 10:07:50,157 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 10:07:50,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:07:50,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 10:07:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-31 10:07:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:07:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-31 10:07:50,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-12-31 10:07:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:50,165 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-31 10:07:50,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 10:07:50,166 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-31 10:07:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-31 10:07:50,167 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:50,167 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:50,167 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:50,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2018-12-31 10:07:50,168 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:50,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:50,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:50,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:50,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 10:07:50,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:50,358 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:50,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:50,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:50,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:50,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 10:07:50,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:50,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-31 10:07:50,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 10:07:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 10:07:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-31 10:07:50,486 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2018-12-31 10:07:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:50,707 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-31 10:07:50,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 10:07:50,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-12-31 10:07:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:50,711 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:07:50,711 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 10:07:50,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:07:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 10:07:50,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-31 10:07:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 10:07:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-31 10:07:50,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2018-12-31 10:07:50,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:50,719 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-31 10:07:50,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 10:07:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-31 10:07:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-31 10:07:50,720 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:50,720 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:50,721 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:50,721 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2018-12-31 10:07:50,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:50,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:50,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:50,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:50,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-31 10:07:50,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:50,898 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:50,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:50,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 10:07:50,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:50,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-31 10:07:51,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:51,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-31 10:07:51,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 10:07:51,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 10:07:51,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:07:51,016 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2018-12-31 10:07:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:51,473 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-31 10:07:51,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:07:51,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-12-31 10:07:51,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:51,476 INFO L225 Difference]: With dead ends: 27 [2018-12-31 10:07:51,477 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 10:07:51,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:07:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 10:07:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 10:07:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 10:07:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-31 10:07:51,483 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2018-12-31 10:07:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:51,484 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-31 10:07:51,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 10:07:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-31 10:07:51,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 10:07:51,485 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:51,486 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:51,486 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:51,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:51,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2018-12-31 10:07:51,486 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:51,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:51,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:51,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:51,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-31 10:07:51,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:51,668 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:51,679 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:51,710 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:51,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:51,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-31 10:07:51,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:51,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-31 10:07:51,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 10:07:51,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 10:07:51,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-31 10:07:51,755 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-12-31 10:07:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:51,978 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-12-31 10:07:51,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 10:07:51,979 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 10:07:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:51,980 INFO L225 Difference]: With dead ends: 30 [2018-12-31 10:07:51,980 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 10:07:51,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:07:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 10:07:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-31 10:07:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 10:07:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-31 10:07:51,988 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2018-12-31 10:07:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:51,988 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-31 10:07:51,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 10:07:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-31 10:07:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-31 10:07:51,991 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:51,991 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:51,991 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:51,992 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2018-12-31 10:07:51,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:51,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:51,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:51,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:51,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-31 10:07:52,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:52,310 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:52,332 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:52,367 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-31 10:07:52,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:52,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-31 10:07:52,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:52,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-31 10:07:52,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 10:07:52,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 10:07:52,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:07:52,424 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2018-12-31 10:07:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:52,648 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-12-31 10:07:52,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 10:07:52,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-31 10:07:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:52,651 INFO L225 Difference]: With dead ends: 33 [2018-12-31 10:07:52,651 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 10:07:52,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:07:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 10:07:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-31 10:07:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-31 10:07:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-31 10:07:52,659 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2018-12-31 10:07:52,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:52,659 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-31 10:07:52,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 10:07:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-31 10:07:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 10:07:52,662 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:52,663 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:52,663 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:52,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:52,663 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2018-12-31 10:07:52,663 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:52,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:52,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:52,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:52,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-31 10:07:52,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:52,868 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:52,879 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:52,917 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-31 10:07:52,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:52,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-31 10:07:52,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:52,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-31 10:07:52,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 10:07:52,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 10:07:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-31 10:07:52,971 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2018-12-31 10:07:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:53,149 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-31 10:07:53,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 10:07:53,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2018-12-31 10:07:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:53,153 INFO L225 Difference]: With dead ends: 36 [2018-12-31 10:07:53,153 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 10:07:53,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:07:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 10:07:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-31 10:07:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-31 10:07:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-12-31 10:07:53,161 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2018-12-31 10:07:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:53,162 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-12-31 10:07:53,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 10:07:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-12-31 10:07:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-31 10:07:53,165 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:53,165 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:53,165 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2018-12-31 10:07:53,166 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:53,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:53,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:53,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:53,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-31 10:07:53,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:53,352 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:53,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:53,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-31 10:07:53,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:53,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-12-31 10:07:53,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 10:07:53,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 10:07:53,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:07:53,467 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2018-12-31 10:07:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:53,829 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-31 10:07:53,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 10:07:53,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2018-12-31 10:07:53,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:53,831 INFO L225 Difference]: With dead ends: 39 [2018-12-31 10:07:53,831 INFO L226 Difference]: Without dead ends: 35 [2018-12-31 10:07:53,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:07:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-31 10:07:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-31 10:07:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-31 10:07:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-31 10:07:53,840 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2018-12-31 10:07:53,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:53,841 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-31 10:07:53,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 10:07:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-31 10:07:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 10:07:53,843 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:53,843 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:53,845 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2018-12-31 10:07:53,845 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:53,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:53,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:53,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:53,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-31 10:07:54,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:54,272 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:54,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:54,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:54,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:54,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-31 10:07:54,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:54,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-31 10:07:54,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 10:07:54,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 10:07:54,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-31 10:07:54,365 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2018-12-31 10:07:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:54,553 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2018-12-31 10:07:54,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 10:07:54,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-12-31 10:07:54,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:54,556 INFO L225 Difference]: With dead ends: 42 [2018-12-31 10:07:54,556 INFO L226 Difference]: Without dead ends: 38 [2018-12-31 10:07:54,558 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-12-31 10:07:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-31 10:07:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-12-31 10:07:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-31 10:07:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-12-31 10:07:54,565 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2018-12-31 10:07:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:54,565 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-12-31 10:07:54,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 10:07:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-12-31 10:07:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-31 10:07:54,567 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:54,569 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:54,569 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:54,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2018-12-31 10:07:54,569 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:54,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:54,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:54,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:54,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-31 10:07:54,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:54,821 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:54,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:54,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-31 10:07:54,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:54,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-31 10:07:54,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:54,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-31 10:07:54,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 10:07:54,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 10:07:54,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:07:54,982 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2018-12-31 10:07:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:55,199 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-12-31 10:07:55,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 10:07:55,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2018-12-31 10:07:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:55,201 INFO L225 Difference]: With dead ends: 45 [2018-12-31 10:07:55,201 INFO L226 Difference]: Without dead ends: 41 [2018-12-31 10:07:55,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:07:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-31 10:07:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-31 10:07:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-31 10:07:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-31 10:07:55,211 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2018-12-31 10:07:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:55,211 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-31 10:07:55,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 10:07:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-31 10:07:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 10:07:55,214 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:55,214 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:55,215 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:55,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:55,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2018-12-31 10:07:55,215 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:55,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:55,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:55,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:55,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-31 10:07:55,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:55,525 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:55,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:55,575 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:55,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:55,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-31 10:07:55,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:55,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-31 10:07:55,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-31 10:07:55,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-31 10:07:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-31 10:07:55,641 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-12-31 10:07:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:55,899 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-31 10:07:55,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 10:07:55,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2018-12-31 10:07:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:55,902 INFO L225 Difference]: With dead ends: 48 [2018-12-31 10:07:55,902 INFO L226 Difference]: Without dead ends: 44 [2018-12-31 10:07:55,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-31 10:07:55,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-31 10:07:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-31 10:07:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-31 10:07:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-12-31 10:07:55,909 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2018-12-31 10:07:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:55,909 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-12-31 10:07:55,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-31 10:07:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-12-31 10:07:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-31 10:07:55,913 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:55,913 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:55,913 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2018-12-31 10:07:55,913 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:55,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:55,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:55,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:55,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-31 10:07:56,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:56,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:56,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:56,309 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-31 10:07:56,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:56,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-31 10:07:56,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:56,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-31 10:07:56,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 10:07:56,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 10:07:56,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:07:56,392 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2018-12-31 10:07:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:56,870 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-12-31 10:07:56,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 10:07:56,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2018-12-31 10:07:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:56,874 INFO L225 Difference]: With dead ends: 51 [2018-12-31 10:07:56,874 INFO L226 Difference]: Without dead ends: 47 [2018-12-31 10:07:56,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-31 10:07:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-31 10:07:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-31 10:07:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-31 10:07:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-12-31 10:07:56,883 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2018-12-31 10:07:56,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:56,885 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-12-31 10:07:56,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 10:07:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-12-31 10:07:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-31 10:07:56,886 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:56,886 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:56,886 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:56,888 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2018-12-31 10:07:56,888 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:56,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:56,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:56,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:56,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-31 10:07:57,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:57,246 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:57,258 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:57,332 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-31 10:07:57,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:57,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-31 10:07:57,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:57,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-31 10:07:57,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 10:07:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 10:07:57,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-12-31 10:07:57,423 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2018-12-31 10:07:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:57,727 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2018-12-31 10:07:57,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 10:07:57,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2018-12-31 10:07:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:57,730 INFO L225 Difference]: With dead ends: 54 [2018-12-31 10:07:57,731 INFO L226 Difference]: Without dead ends: 50 [2018-12-31 10:07:57,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-12-31 10:07:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-31 10:07:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-12-31 10:07:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-31 10:07:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-12-31 10:07:57,740 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2018-12-31 10:07:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:57,742 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-12-31 10:07:57,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 10:07:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-12-31 10:07:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-12-31 10:07:57,743 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:57,743 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:57,745 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:57,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2018-12-31 10:07:57,746 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:57,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:57,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:57,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:57,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-31 10:07:58,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:58,207 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:58,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:58,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-31 10:07:58,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:58,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-12-31 10:07:58,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 10:07:58,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 10:07:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:07:58,337 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2018-12-31 10:07:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:58,670 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-12-31 10:07:58,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 10:07:58,672 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2018-12-31 10:07:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:58,674 INFO L225 Difference]: With dead ends: 57 [2018-12-31 10:07:58,674 INFO L226 Difference]: Without dead ends: 53 [2018-12-31 10:07:58,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-12-31 10:07:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-31 10:07:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-12-31 10:07:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-31 10:07:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-12-31 10:07:58,683 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2018-12-31 10:07:58,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:58,683 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-12-31 10:07:58,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 10:07:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-12-31 10:07:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-31 10:07:58,684 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:58,684 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:58,685 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:58,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2018-12-31 10:07:58,687 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:58,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:58,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:58,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:58,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-31 10:07:59,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:59,278 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:59,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:59,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:59,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:59,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-31 10:07:59,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:59,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-12-31 10:07:59,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-31 10:07:59,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-31 10:07:59,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-12-31 10:07:59,425 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2018-12-31 10:07:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:59,744 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2018-12-31 10:07:59,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-31 10:07:59,745 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2018-12-31 10:07:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:59,746 INFO L225 Difference]: With dead ends: 60 [2018-12-31 10:07:59,747 INFO L226 Difference]: Without dead ends: 56 [2018-12-31 10:07:59,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 10:07:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-31 10:07:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-31 10:07:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-31 10:07:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-12-31 10:07:59,755 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2018-12-31 10:07:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:59,755 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-12-31 10:07:59,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-31 10:07:59,756 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-12-31 10:07:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-12-31 10:07:59,758 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:59,758 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:59,758 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2018-12-31 10:07:59,760 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:59,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:59,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:59,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-12-31 10:08:00,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:00,089 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:00,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:08:00,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-31 10:08:00,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:00,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-12-31 10:08:00,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:00,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-12-31 10:08:00,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 10:08:00,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 10:08:00,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:08:00,249 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 20 states. [2018-12-31 10:08:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:00,685 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-12-31 10:08:00,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 10:08:00,686 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2018-12-31 10:08:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:00,688 INFO L225 Difference]: With dead ends: 63 [2018-12-31 10:08:00,688 INFO L226 Difference]: Without dead ends: 59 [2018-12-31 10:08:00,690 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-12-31 10:08:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-31 10:08:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-31 10:08:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-31 10:08:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-12-31 10:08:00,697 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2018-12-31 10:08:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:00,697 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-12-31 10:08:00,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 10:08:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-12-31 10:08:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-12-31 10:08:00,701 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:00,701 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:00,701 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2018-12-31 10:08:00,703 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:00,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:00,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:00,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:00,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-12-31 10:08:01,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:01,693 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:01,706 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:08:01,745 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:08:01,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:01,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-12-31 10:08:01,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:01,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-12-31 10:08:01,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 10:08:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 10:08:01,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-12-31 10:08:01,822 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2018-12-31 10:08:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:02,222 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2018-12-31 10:08:02,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-31 10:08:02,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2018-12-31 10:08:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:02,225 INFO L225 Difference]: With dead ends: 66 [2018-12-31 10:08:02,225 INFO L226 Difference]: Without dead ends: 62 [2018-12-31 10:08:02,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-12-31 10:08:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-31 10:08:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-12-31 10:08:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-31 10:08:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-12-31 10:08:02,232 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2018-12-31 10:08:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:02,234 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-12-31 10:08:02,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 10:08:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-12-31 10:08:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-12-31 10:08:02,237 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:02,237 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:02,237 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:02,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2018-12-31 10:08:02,237 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:02,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:02,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:02,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:02,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-12-31 10:08:03,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:03,150 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:03,159 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:08:03,234 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-12-31 10:08:03,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:03,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-12-31 10:08:03,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:03,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-12-31 10:08:03,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-31 10:08:03,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-31 10:08:03,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-12-31 10:08:03,307 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 22 states. [2018-12-31 10:08:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:03,625 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-12-31 10:08:03,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-31 10:08:03,626 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2018-12-31 10:08:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:03,627 INFO L225 Difference]: With dead ends: 69 [2018-12-31 10:08:03,628 INFO L226 Difference]: Without dead ends: 65 [2018-12-31 10:08:03,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 10:08:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-31 10:08:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-12-31 10:08:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-31 10:08:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-12-31 10:08:03,636 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2018-12-31 10:08:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:03,636 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-12-31 10:08:03,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-31 10:08:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-12-31 10:08:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-12-31 10:08:03,639 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:03,639 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:03,639 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:03,640 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2018-12-31 10:08:03,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:03,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:03,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:03,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:03,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-12-31 10:08:03,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:03,943 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:03,955 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:08:04,010 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-12-31 10:08:04,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:04,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-12-31 10:08:04,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:04,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-12-31 10:08:04,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-31 10:08:04,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-31 10:08:04,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-12-31 10:08:04,097 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 23 states. [2018-12-31 10:08:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:04,636 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2018-12-31 10:08:04,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-31 10:08:04,638 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 117 [2018-12-31 10:08:04,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:04,639 INFO L225 Difference]: With dead ends: 72 [2018-12-31 10:08:04,640 INFO L226 Difference]: Without dead ends: 68 [2018-12-31 10:08:04,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-12-31 10:08:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-31 10:08:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-31 10:08:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-31 10:08:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-12-31 10:08:04,647 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2018-12-31 10:08:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:04,647 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-12-31 10:08:04,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-31 10:08:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-12-31 10:08:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-31 10:08:04,650 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:04,650 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:04,650 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:04,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2018-12-31 10:08:04,652 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:04,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:04,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:04,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:04,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-12-31 10:08:04,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:04,988 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:04,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:05,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-12-31 10:08:05,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:05,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-12-31 10:08:05,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 10:08:05,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 10:08:05,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:08:05,119 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 24 states. [2018-12-31 10:08:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:05,739 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-12-31 10:08:05,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-31 10:08:05,741 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 123 [2018-12-31 10:08:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:05,742 INFO L225 Difference]: With dead ends: 75 [2018-12-31 10:08:05,742 INFO L226 Difference]: Without dead ends: 71 [2018-12-31 10:08:05,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-12-31 10:08:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-31 10:08:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-12-31 10:08:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-12-31 10:08:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-12-31 10:08:05,749 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2018-12-31 10:08:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:05,751 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-12-31 10:08:05,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 10:08:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-12-31 10:08:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-12-31 10:08:05,752 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:05,752 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:05,753 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:05,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2018-12-31 10:08:05,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:05,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:05,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:05,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:05,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2018-12-31 10:08:07,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:07,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:07,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:08:08,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:08:08,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:08,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2018-12-31 10:08:08,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:08,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 53 [2018-12-31 10:08:08,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-12-31 10:08:08,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-12-31 10:08:08,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2645, Unknown=0, NotChecked=0, Total=2756 [2018-12-31 10:08:08,638 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 53 states. [2018-12-31 10:08:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:13,033 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-12-31 10:08:13,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-31 10:08:13,034 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 129 [2018-12-31 10:08:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:13,039 INFO L225 Difference]: With dead ends: 78 [2018-12-31 10:08:13,040 INFO L226 Difference]: Without dead ends: 74 [2018-12-31 10:08:13,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 124 SyntacticMatches, 21 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=484, Invalid=8446, Unknown=0, NotChecked=0, Total=8930 [2018-12-31 10:08:13,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-12-31 10:08:13,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-12-31 10:08:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-31 10:08:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-12-31 10:08:13,055 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2018-12-31 10:08:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:13,055 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-12-31 10:08:13,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-12-31 10:08:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-12-31 10:08:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-12-31 10:08:13,056 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:13,061 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:13,061 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:13,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2018-12-31 10:08:13,062 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:13,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:13,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:13,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:13,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 41 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-12-31 10:08:13,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:13,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:13,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:08:13,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-12-31 10:08:13,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:13,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 41 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-12-31 10:08:14,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:14,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-12-31 10:08:14,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-31 10:08:14,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-31 10:08:14,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-12-31 10:08:14,048 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 25 states. [2018-12-31 10:08:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:14,657 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2018-12-31 10:08:14,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-31 10:08:14,662 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 135 [2018-12-31 10:08:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:14,663 INFO L225 Difference]: With dead ends: 74 [2018-12-31 10:08:14,663 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 10:08:14,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-12-31 10:08:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 10:08:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 10:08:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 10:08:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 10:08:14,667 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2018-12-31 10:08:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:14,667 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 10:08:14,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-31 10:08:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 10:08:14,668 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 10:08:14,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 10:08:14,733 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-12-31 10:08:14,733 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 10:08:14,733 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 10:08:14,733 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 10:08:14,733 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-12-31 10:08:14,733 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-12-31 10:08:14,734 INFO L444 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 20) (<= 20 ULTIMATE.start_main_~a~0)) [2018-12-31 10:08:14,734 INFO L448 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-12-31 10:08:14,734 INFO L448 ceAbstractionStarter]: For program point L11(lines 11 18) no Hoare annotation was computed. [2018-12-31 10:08:14,734 INFO L448 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-12-31 10:08:14,734 INFO L444 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (<= |sum_#in~m| sum_~m) (<= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2018-12-31 10:08:14,735 INFO L448 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-12-31 10:08:14,735 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-12-31 10:08:14,735 INFO L448 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-12-31 10:08:14,735 INFO L451 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-12-31 10:08:14,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 10:08:14 BoogieIcfgContainer [2018-12-31 10:08:14,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 10:08:14,739 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 10:08:14,739 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 10:08:14,739 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 10:08:14,739 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:48" (3/4) ... [2018-12-31 10:08:14,744 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 10:08:14,750 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-12-31 10:08:14,754 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-31 10:08:14,755 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-31 10:08:14,800 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 10:08:14,801 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 10:08:14,802 INFO L168 Benchmark]: Toolchain (without parser) took 26648.69 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 418.4 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -141.6 MB). Peak memory consumption was 276.8 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:14,803 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:14,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.30 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:14,805 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.15 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:14,806 INFO L168 Benchmark]: Boogie Preprocessor took 22.66 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:14,806 INFO L168 Benchmark]: RCFGBuilder took 364.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -182.2 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:14,806 INFO L168 Benchmark]: TraceAbstraction took 25853.34 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 280.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.5 MB). Peak memory consumption was 292.0 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:14,807 INFO L168 Benchmark]: Witness Printer took 62.13 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:14,811 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 297.30 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 42.15 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.66 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 364.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -182.2 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 25853.34 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 280.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.5 MB). Peak memory consumption was 292.0 MB. Max. memory is 11.5 GB. * Witness Printer took 62.13 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. SAFE Result, 25.7s OverallTime, 22 OverallIterations, 22 TraceHistogramMax, 11.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 235 SDtfs, 577 SDslu, 2205 SDs, 0 SdLazy, 3811 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2441 GetRequests, 1823 SyntacticMatches, 21 SemanticMatches, 597 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 24 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 3159 NumberOfCodeBlocks, 3159 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3116 ConstructedInterpolants, 0 QuantifiedInterpolants, 920248 SizeOfPredicates, 276 NumberOfNonLiveVariables, 4746 ConjunctsInSsa, 677 ConjunctsInUnsatCore, 43 InterpolantComputations, 1 PerfectInterpolantSequences, 11387/20328 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...