./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/id_i25_o25_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/id_i25_o25_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 980109aaf5797fcdc56688cd1127831babfd66a2 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:07:33,904 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 10:07:33,906 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 10:07:33,918 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 10:07:33,918 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 10:07:33,920 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 10:07:33,921 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 10:07:33,923 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 10:07:33,925 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 10:07:33,927 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 10:07:33,928 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 10:07:33,928 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 10:07:33,931 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 10:07:33,932 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 10:07:33,933 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 10:07:33,938 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 10:07:33,939 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 10:07:33,948 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 10:07:33,952 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 10:07:33,956 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 10:07:33,957 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 10:07:33,961 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 10:07:33,966 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 10:07:33,967 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 10:07:33,967 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 10:07:33,968 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 10:07:33,972 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 10:07:33,973 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 10:07:33,973 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 10:07:33,976 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 10:07:33,977 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 10:07:33,977 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 10:07:33,977 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 10:07:33,979 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 10:07:33,980 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 10:07:33,981 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 10:07:33,981 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 10:07:34,007 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 10:07:34,007 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 10:07:34,012 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 10:07:34,012 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 10:07:34,012 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 10:07:34,013 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 10:07:34,013 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 10:07:34,013 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 10:07:34,013 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 10:07:34,013 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 10:07:34,013 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 10:07:34,014 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 10:07:34,014 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 10:07:34,014 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 10:07:34,014 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 10:07:34,014 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 10:07:34,014 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 10:07:34,016 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 10:07:34,016 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 10:07:34,016 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 10:07:34,016 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 10:07:34,017 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:07:34,017 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 10:07:34,017 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 10:07:34,017 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 10:07:34,017 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 10:07:34,017 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 10:07:34,018 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 10:07:34,018 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 -> 980109aaf5797fcdc56688cd1127831babfd66a2 [2018-12-31 10:07:34,073 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 10:07:34,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 10:07:34,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 10:07:34,098 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 10:07:34,098 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 10:07:34,099 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/id_i25_o25_true-unreach-call_true-termination.c [2018-12-31 10:07:34,164 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a7da930/2cdf791d6a4844e494facd36ea1b57d3/FLAG9f3f6e31c [2018-12-31 10:07:34,664 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 10:07:34,666 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/id_i25_o25_true-unreach-call_true-termination.c [2018-12-31 10:07:34,672 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a7da930/2cdf791d6a4844e494facd36ea1b57d3/FLAG9f3f6e31c [2018-12-31 10:07:35,016 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a7da930/2cdf791d6a4844e494facd36ea1b57d3 [2018-12-31 10:07:35,020 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 10:07:35,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 10:07:35,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:35,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 10:07:35,027 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 10:07:35,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c5cbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35, skipping insertion in model container [2018-12-31 10:07:35,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 10:07:35,061 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 10:07:35,223 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:35,227 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 10:07:35,243 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:35,257 INFO L195 MainTranslator]: Completed translation [2018-12-31 10:07:35,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35 WrapperNode [2018-12-31 10:07:35,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:35,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:35,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 10:07:35,259 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 10:07:35,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:35,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 10:07:35,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 10:07:35,298 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 10:07:35,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (1/1) ... [2018-12-31 10:07:35,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 10:07:35,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 10:07:35,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 10:07:35,319 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 10:07:35,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (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 10:07:35,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 10:07:35,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 10:07:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-31 10:07:35,454 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-31 10:07:35,660 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 10:07:35,660 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 10:07:35,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:35 BoogieIcfgContainer [2018-12-31 10:07:35,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 10:07:35,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 10:07:35,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 10:07:35,665 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 10:07:35,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 10:07:35" (1/3) ... [2018-12-31 10:07:35,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d03a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:35, skipping insertion in model container [2018-12-31 10:07:35,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:35" (2/3) ... [2018-12-31 10:07:35,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d03a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:35, skipping insertion in model container [2018-12-31 10:07:35,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:35" (3/3) ... [2018-12-31 10:07:35,669 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25_true-unreach-call_true-termination.c [2018-12-31 10:07:35,677 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 10:07:35,685 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 10:07:35,699 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 10:07:35,733 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 10:07:35,734 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 10:07:35,734 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 10:07:35,734 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 10:07:35,734 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 10:07:35,734 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 10:07:35,734 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 10:07:35,734 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 10:07:35,735 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 10:07:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-31 10:07:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 10:07:35,760 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:35,761 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:35,764 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:35,770 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2018-12-31 10:07:35,772 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:35,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:35,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:35,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:35,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:36,104 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 10:07:36,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:07:36,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:07:36,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:07:36,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:07:36,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:36,128 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2018-12-31 10:07:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:36,287 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-31 10:07:36,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:07:36,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 10:07:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:36,300 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:07:36,300 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 10:07:36,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 10:07:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-31 10:07:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 10:07:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-31 10:07:36,356 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-12-31 10:07:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:36,358 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-31 10:07:36,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:07:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-31 10:07:36,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-31 10:07:36,367 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:36,368 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:36,368 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2018-12-31 10:07:36,370 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:36,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:36,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:36,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:36,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:36,692 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 10:07:36,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:36,692 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 10:07:36,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:36,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:36,791 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 10:07:36,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:36,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 10:07:36,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 10:07:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 10:07:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:36,836 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2018-12-31 10:07:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:37,029 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-31 10:07:37,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 10:07:37,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-12-31 10:07:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:37,032 INFO L225 Difference]: With dead ends: 21 [2018-12-31 10:07:37,032 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 10:07:37,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:07:37,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 10:07:37,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-31 10:07:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:07:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-31 10:07:37,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-12-31 10:07:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:37,041 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-31 10:07:37,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 10:07:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-31 10:07:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-31 10:07:37,043 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:37,043 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:37,044 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:37,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2018-12-31 10:07:37,044 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:37,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:37,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:37,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:37,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:37,277 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 10:07:37,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:37,277 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 10:07:37,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:37,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:37,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:37,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:37,372 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 10:07:37,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:37,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-31 10:07:37,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 10:07:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 10:07:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-31 10:07:37,399 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2018-12-31 10:07:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:37,587 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-31 10:07:37,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 10:07:37,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-12-31 10:07:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:37,590 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:07:37,591 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 10:07:37,591 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 10:07:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 10:07:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-31 10:07:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 10:07:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-31 10:07:37,597 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2018-12-31 10:07:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:37,599 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-31 10:07:37,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 10:07:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-31 10:07:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-31 10:07:37,601 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:37,601 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:37,601 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2018-12-31 10:07:37,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:37,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:37,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:37,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:37,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:37,854 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 10:07:37,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:37,855 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 10:07:37,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:37,890 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 10:07:37,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:37,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:37,923 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 10:07:37,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:37,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-31 10:07:37,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 10:07:37,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 10:07:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:07:37,951 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2018-12-31 10:07:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:38,105 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-31 10:07:38,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:07:38,107 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-12-31 10:07:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:38,108 INFO L225 Difference]: With dead ends: 27 [2018-12-31 10:07:38,108 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 10:07:38,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:07:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 10:07:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 10:07:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 10:07:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-31 10:07:38,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2018-12-31 10:07:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:38,117 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-31 10:07:38,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 10:07:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-31 10:07:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 10:07:38,119 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:38,119 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:38,119 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:38,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2018-12-31 10:07:38,120 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:38,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:38,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:38,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:38,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:38,572 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 10:07:38,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:38,573 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 10:07:38,589 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:38,604 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:38,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:38,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:38,635 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 10:07:38,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:38,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-31 10:07:38,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 10:07:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 10:07:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-31 10:07:38,658 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-12-31 10:07:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:38,808 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-12-31 10:07:38,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 10:07:38,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 10:07:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:38,811 INFO L225 Difference]: With dead ends: 30 [2018-12-31 10:07:38,811 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 10:07:38,812 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:07:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 10:07:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-31 10:07:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 10:07:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-31 10:07:38,818 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2018-12-31 10:07:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:38,819 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-31 10:07:38,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 10:07:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-31 10:07:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-31 10:07:38,821 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:38,821 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:38,821 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2018-12-31 10:07:38,822 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:38,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:38,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:38,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:38,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:39,013 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 10:07:39,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:39,014 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 10:07:39,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:39,066 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-31 10:07:39,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:39,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:39,104 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 10:07:39,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:39,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-31 10:07:39,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 10:07:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 10:07:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:07:39,129 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2018-12-31 10:07:39,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:39,324 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-12-31 10:07:39,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 10:07:39,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-31 10:07:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:39,327 INFO L225 Difference]: With dead ends: 33 [2018-12-31 10:07:39,327 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 10:07:39,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:07:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 10:07:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-31 10:07:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-31 10:07:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-31 10:07:39,335 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2018-12-31 10:07:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:39,335 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-31 10:07:39,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 10:07:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-31 10:07:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 10:07:39,337 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:39,337 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:39,337 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2018-12-31 10:07:39,338 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:39,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:39,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:39,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:39,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:39,585 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 10:07:39,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:39,586 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 10:07:39,597 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:39,624 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-31 10:07:39,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:39,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:39,656 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 10:07:39,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:39,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-31 10:07:39,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 10:07:39,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 10:07:39,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-31 10:07:39,679 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2018-12-31 10:07:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:39,858 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-31 10:07:39,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 10:07:39,859 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2018-12-31 10:07:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:39,860 INFO L225 Difference]: With dead ends: 36 [2018-12-31 10:07:39,861 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 10:07:39,863 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 10:07:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 10:07:39,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-31 10:07:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-31 10:07:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-12-31 10:07:39,870 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2018-12-31 10:07:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:39,870 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-12-31 10:07:39,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 10:07:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-12-31 10:07:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-31 10:07:39,874 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:39,874 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:39,875 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:39,875 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2018-12-31 10:07:39,876 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:39,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:39,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:39,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:39,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:40,054 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 10:07:40,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:40,054 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 10:07:40,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:40,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:40,117 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 10:07:40,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:40,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-12-31 10:07:40,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 10:07:40,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 10:07:40,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:07:40,140 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2018-12-31 10:07:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:40,422 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-31 10:07:40,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 10:07:40,423 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2018-12-31 10:07:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:40,424 INFO L225 Difference]: With dead ends: 39 [2018-12-31 10:07:40,424 INFO L226 Difference]: Without dead ends: 35 [2018-12-31 10:07:40,429 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 10:07:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-31 10:07:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-31 10:07:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-31 10:07:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-31 10:07:40,443 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2018-12-31 10:07:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:40,444 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-31 10:07:40,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 10:07:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-31 10:07:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 10:07:40,446 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:40,448 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:40,448 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2018-12-31 10:07:40,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:40,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:40,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:40,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:40,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:40,867 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 10:07:40,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:40,867 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 10:07:40,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:40,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:40,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:40,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:40,954 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 10:07:40,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:40,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-31 10:07:40,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 10:07:40,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 10:07:40,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-31 10:07:40,989 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2018-12-31 10:07:41,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:41,243 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2018-12-31 10:07:41,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 10:07:41,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-12-31 10:07:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:41,246 INFO L225 Difference]: With dead ends: 42 [2018-12-31 10:07:41,246 INFO L226 Difference]: Without dead ends: 38 [2018-12-31 10:07:41,247 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 10:07:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-31 10:07:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-12-31 10:07:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-31 10:07:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-12-31 10:07:41,253 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2018-12-31 10:07:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:41,254 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-12-31 10:07:41,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 10:07:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-12-31 10:07:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-31 10:07:41,256 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:41,256 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:41,256 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2018-12-31 10:07:41,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:41,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:41,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:41,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:41,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:41,506 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 10:07:41,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:41,506 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 10:07:41,516 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:41,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-31 10:07:41,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:41,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:41,713 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 10:07:41,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:41,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-31 10:07:41,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 10:07:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 10:07:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:07:41,742 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2018-12-31 10:07:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:42,058 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-12-31 10:07:42,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 10:07:42,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2018-12-31 10:07:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:42,062 INFO L225 Difference]: With dead ends: 45 [2018-12-31 10:07:42,062 INFO L226 Difference]: Without dead ends: 41 [2018-12-31 10:07:42,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:07:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-31 10:07:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-31 10:07:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-31 10:07:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-31 10:07:42,069 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2018-12-31 10:07:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:42,069 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-31 10:07:42,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 10:07:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-31 10:07:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 10:07:42,074 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:42,074 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:42,074 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:42,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2018-12-31 10:07:42,076 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:42,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:42,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:42,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:42,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:42,296 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 10:07:42,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:42,296 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 10:07:42,309 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:42,359 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:42,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:42,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:42,403 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 10:07:42,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:42,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-31 10:07:42,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-31 10:07:42,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-31 10:07:42,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-31 10:07:42,433 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-12-31 10:07:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:42,807 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-31 10:07:42,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 10:07:42,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2018-12-31 10:07:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:42,810 INFO L225 Difference]: With dead ends: 48 [2018-12-31 10:07:42,810 INFO L226 Difference]: Without dead ends: 44 [2018-12-31 10:07:42,812 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-31 10:07:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-31 10:07:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-31 10:07:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-31 10:07:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-12-31 10:07:42,819 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2018-12-31 10:07:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:42,819 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-12-31 10:07:42,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-31 10:07:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-12-31 10:07:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-31 10:07:42,822 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:42,823 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:42,823 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:42,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2018-12-31 10:07:42,823 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:42,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:42,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:42,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:42,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:43,146 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 10:07:43,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:43,147 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 10:07:43,161 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:43,193 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-31 10:07:43,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:43,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:43,234 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 10:07:43,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:43,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-31 10:07:43,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 10:07:43,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 10:07:43,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:07:43,272 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2018-12-31 10:07:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:43,729 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-12-31 10:07:43,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 10:07:43,730 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2018-12-31 10:07:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:43,732 INFO L225 Difference]: With dead ends: 51 [2018-12-31 10:07:43,732 INFO L226 Difference]: Without dead ends: 47 [2018-12-31 10:07:43,734 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 10:07:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-31 10:07:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-31 10:07:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-31 10:07:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-12-31 10:07:43,742 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2018-12-31 10:07:43,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:43,742 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-12-31 10:07:43,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 10:07:43,742 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-12-31 10:07:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-31 10:07:43,743 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:43,744 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:43,745 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:43,746 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2018-12-31 10:07:43,746 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:43,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:43,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:43,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:43,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:44,113 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 10:07:44,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:44,114 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 10:07:44,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:44,188 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-31 10:07:44,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:44,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:44,247 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 10:07:44,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:44,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-31 10:07:44,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 10:07:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 10:07:44,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-12-31 10:07:44,284 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2018-12-31 10:07:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:44,568 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2018-12-31 10:07:44,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 10:07:44,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2018-12-31 10:07:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:44,571 INFO L225 Difference]: With dead ends: 54 [2018-12-31 10:07:44,571 INFO L226 Difference]: Without dead ends: 50 [2018-12-31 10:07:44,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-12-31 10:07:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-31 10:07:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-12-31 10:07:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-31 10:07:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-12-31 10:07:44,580 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2018-12-31 10:07:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:44,583 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-12-31 10:07:44,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 10:07:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-12-31 10:07:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-12-31 10:07:44,584 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:44,585 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:44,585 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:44,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2018-12-31 10:07:44,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:44,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:44,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:44,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:44,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:44,873 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 10:07:44,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:44,873 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 10:07:44,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:44,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:44,956 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 10:07:44,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:44,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-12-31 10:07:44,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 10:07:44,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 10:07:44,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:07:44,989 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2018-12-31 10:07:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:45,329 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-12-31 10:07:45,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 10:07:45,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2018-12-31 10:07:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:45,333 INFO L225 Difference]: With dead ends: 57 [2018-12-31 10:07:45,333 INFO L226 Difference]: Without dead ends: 53 [2018-12-31 10:07:45,334 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-12-31 10:07:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-31 10:07:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-12-31 10:07:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-31 10:07:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-12-31 10:07:45,340 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2018-12-31 10:07:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:45,342 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-12-31 10:07:45,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 10:07:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-12-31 10:07:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-31 10:07:45,344 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:45,344 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:45,345 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2018-12-31 10:07:45,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:45,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:45,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:45,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:45,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:46,112 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 10:07:46,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:46,112 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 10:07:46,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:46,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:46,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:46,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:46,199 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 10:07:46,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:46,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-12-31 10:07:46,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-31 10:07:46,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-31 10:07:46,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-12-31 10:07:46,223 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2018-12-31 10:07:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:46,514 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2018-12-31 10:07:46,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-31 10:07:46,516 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2018-12-31 10:07:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:46,517 INFO L225 Difference]: With dead ends: 60 [2018-12-31 10:07:46,518 INFO L226 Difference]: Without dead ends: 56 [2018-12-31 10:07:46,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 10:07:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-31 10:07:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-31 10:07:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-31 10:07:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-12-31 10:07:46,525 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2018-12-31 10:07:46,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:46,525 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-12-31 10:07:46,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-31 10:07:46,525 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-12-31 10:07:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-12-31 10:07:46,526 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:46,526 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:46,527 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2018-12-31 10:07:46,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:46,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:46,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:46,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:46,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:46,774 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 10:07:46,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:46,775 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 10:07:46,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:46,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-31 10:07:46,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:46,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:46,878 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 10:07:46,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:46,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-12-31 10:07:46,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 10:07:46,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 10:07:46,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:07:46,910 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 20 states. [2018-12-31 10:07:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:47,432 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-12-31 10:07:47,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 10:07:47,433 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2018-12-31 10:07:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:47,435 INFO L225 Difference]: With dead ends: 63 [2018-12-31 10:07:47,435 INFO L226 Difference]: Without dead ends: 59 [2018-12-31 10:07:47,436 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 10:07:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-31 10:07:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-31 10:07:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-31 10:07:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-12-31 10:07:47,441 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2018-12-31 10:07:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:47,442 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-12-31 10:07:47,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 10:07:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-12-31 10:07:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-12-31 10:07:47,444 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:47,446 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:47,446 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2018-12-31 10:07:47,446 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:47,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:47,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:47,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:47,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:47,744 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 10:07:47,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:47,745 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 10:07:47,755 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:47,804 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:47,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:47,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:47,870 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 10:07:47,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:47,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-12-31 10:07:47,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 10:07:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 10:07:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-12-31 10:07:47,897 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2018-12-31 10:07:48,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:48,250 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2018-12-31 10:07:48,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-31 10:07:48,251 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2018-12-31 10:07:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:48,253 INFO L225 Difference]: With dead ends: 66 [2018-12-31 10:07:48,253 INFO L226 Difference]: Without dead ends: 62 [2018-12-31 10:07:48,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-12-31 10:07:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-31 10:07:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-12-31 10:07:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-31 10:07:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-12-31 10:07:48,265 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2018-12-31 10:07:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:48,265 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-12-31 10:07:48,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 10:07:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-12-31 10:07:48,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-12-31 10:07:48,269 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:48,269 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:48,269 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2018-12-31 10:07:48,270 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:48,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:48,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:48,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:48,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:48,577 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 10:07:48,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:48,578 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 10:07:48,588 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:48,634 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-12-31 10:07:48,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:48,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:48,669 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 10:07:48,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:48,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-12-31 10:07:48,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-31 10:07:48,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-31 10:07:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-12-31 10:07:48,703 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 22 states. [2018-12-31 10:07:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:49,035 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-12-31 10:07:49,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-31 10:07:49,036 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2018-12-31 10:07:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:49,037 INFO L225 Difference]: With dead ends: 69 [2018-12-31 10:07:49,038 INFO L226 Difference]: Without dead ends: 65 [2018-12-31 10:07:49,040 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 10:07:49,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-31 10:07:49,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-12-31 10:07:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-31 10:07:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-12-31 10:07:49,053 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2018-12-31 10:07:49,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:49,054 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-12-31 10:07:49,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-31 10:07:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-12-31 10:07:49,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-12-31 10:07:49,056 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:49,057 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:49,057 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:49,057 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2018-12-31 10:07:49,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:49,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:49,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:49,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:49,372 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 10:07:49,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:49,372 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 10:07:49,383 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:49,427 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-12-31 10:07:49,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:49,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:49,471 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 10:07:49,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:49,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-12-31 10:07:49,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-31 10:07:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-31 10:07:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-12-31 10:07:49,494 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 23 states. [2018-12-31 10:07:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:50,209 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2018-12-31 10:07:50,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-31 10:07:50,210 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 117 [2018-12-31 10:07:50,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:50,212 INFO L225 Difference]: With dead ends: 72 [2018-12-31 10:07:50,212 INFO L226 Difference]: Without dead ends: 68 [2018-12-31 10:07:50,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-12-31 10:07:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-31 10:07:50,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-31 10:07:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-31 10:07:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-12-31 10:07:50,218 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2018-12-31 10:07:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:50,218 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-12-31 10:07:50,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-31 10:07:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-12-31 10:07:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-31 10:07:50,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:50,222 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:50,222 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:50,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2018-12-31 10:07:50,223 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:50,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:50,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:50,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:50,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:50,804 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 10:07:50,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:50,804 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 10:07:50,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:50,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:50,928 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 10:07:50,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:50,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-12-31 10:07:50,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 10:07:50,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 10:07:50,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:07:50,968 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 24 states. [2018-12-31 10:07:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:51,877 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-12-31 10:07:51,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-31 10:07:51,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 123 [2018-12-31 10:07:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:51,880 INFO L225 Difference]: With dead ends: 75 [2018-12-31 10:07:51,880 INFO L226 Difference]: Without dead ends: 71 [2018-12-31 10:07:51,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-12-31 10:07:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-31 10:07:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-12-31 10:07:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-12-31 10:07:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-12-31 10:07:51,886 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2018-12-31 10:07:51,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:51,887 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-12-31 10:07:51,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 10:07:51,887 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-12-31 10:07:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-12-31 10:07:51,888 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:51,888 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:51,888 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2018-12-31 10:07:51,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:51,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:51,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:51,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:51,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-12-31 10:07:52,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:52,783 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 10:07:52,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:52,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:52,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:52,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-12-31 10:07:52,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:52,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-12-31 10:07:52,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-31 10:07:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-31 10:07:52,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-12-31 10:07:52,893 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 25 states. [2018-12-31 10:07:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:53,242 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-12-31 10:07:53,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-31 10:07:53,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 129 [2018-12-31 10:07:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:53,245 INFO L225 Difference]: With dead ends: 78 [2018-12-31 10:07:53,245 INFO L226 Difference]: Without dead ends: 74 [2018-12-31 10:07:53,248 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-12-31 10:07:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-12-31 10:07:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-12-31 10:07:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-31 10:07:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-12-31 10:07:53,253 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2018-12-31 10:07:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:53,253 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-12-31 10:07:53,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-31 10:07:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-12-31 10:07:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-12-31 10:07:53,254 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:53,254 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:53,257 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:53,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2018-12-31 10:07:53,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:53,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:53,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:53,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:53,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-12-31 10:07:54,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:54,126 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 10:07:54,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:54,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-12-31 10:07:54,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:54,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-12-31 10:07:54,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:54,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-12-31 10:07:54,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-31 10:07:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-31 10:07:54,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-12-31 10:07:54,252 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2018-12-31 10:07:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:54,724 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-12-31 10:07:54,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-31 10:07:54,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 135 [2018-12-31 10:07:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:54,730 INFO L225 Difference]: With dead ends: 81 [2018-12-31 10:07:54,730 INFO L226 Difference]: Without dead ends: 77 [2018-12-31 10:07:54,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-12-31 10:07:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-31 10:07:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-12-31 10:07:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-31 10:07:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-12-31 10:07:54,736 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2018-12-31 10:07:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:54,736 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-12-31 10:07:54,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-31 10:07:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-12-31 10:07:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-12-31 10:07:54,737 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:54,740 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:54,741 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash -555819607, now seen corresponding path program 22 times [2018-12-31 10:07:54,741 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:54,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:54,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:54,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:54,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-12-31 10:07:55,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:55,287 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:55,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:55,339 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:55,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:55,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-12-31 10:07:55,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:55,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-12-31 10:07:55,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-31 10:07:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-31 10:07:55,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-12-31 10:07:55,420 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 27 states. [2018-12-31 10:07:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:55,935 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2018-12-31 10:07:55,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-31 10:07:55,937 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 141 [2018-12-31 10:07:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:55,938 INFO L225 Difference]: With dead ends: 84 [2018-12-31 10:07:55,938 INFO L226 Difference]: Without dead ends: 80 [2018-12-31 10:07:55,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-12-31 10:07:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-31 10:07:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-12-31 10:07:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-31 10:07:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-12-31 10:07:55,945 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2018-12-31 10:07:55,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:55,945 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-12-31 10:07:55,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-31 10:07:55,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-12-31 10:07:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-12-31 10:07:55,946 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:55,949 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:55,950 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:55,950 INFO L82 PathProgramCache]: Analyzing trace with hash -945685357, now seen corresponding path program 23 times [2018-12-31 10:07:55,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:55,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:55,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:55,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:55,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-12-31 10:07:56,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:56,446 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:56,460 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:56,522 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-12-31 10:07:56,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:56,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-12-31 10:07:56,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:56,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-12-31 10:07:56,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-31 10:07:56,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-31 10:07:56,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-12-31 10:07:56,596 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 28 states. [2018-12-31 10:07:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:57,155 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-12-31 10:07:57,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-31 10:07:57,156 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 147 [2018-12-31 10:07:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:57,158 INFO L225 Difference]: With dead ends: 87 [2018-12-31 10:07:57,159 INFO L226 Difference]: Without dead ends: 83 [2018-12-31 10:07:57,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-12-31 10:07:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-31 10:07:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-12-31 10:07:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-31 10:07:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-12-31 10:07:57,167 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2018-12-31 10:07:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:57,167 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-12-31 10:07:57,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-31 10:07:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-12-31 10:07:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-31 10:07:57,171 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:57,171 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:57,171 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1588806697, now seen corresponding path program 24 times [2018-12-31 10:07:57,172 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:57,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:57,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:57,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:57,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-12-31 10:07:57,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:57,928 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:57,941 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:58,035 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-12-31 10:07:58,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:58,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-12-31 10:07:58,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:58,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-12-31 10:07:58,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-31 10:07:58,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-31 10:07:58,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-12-31 10:07:58,134 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 29 states. [2018-12-31 10:07:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:58,999 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2018-12-31 10:07:59,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-31 10:07:59,001 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 153 [2018-12-31 10:07:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:59,003 INFO L225 Difference]: With dead ends: 90 [2018-12-31 10:07:59,003 INFO L226 Difference]: Without dead ends: 86 [2018-12-31 10:07:59,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-12-31 10:07:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-31 10:07:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-12-31 10:07:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-31 10:07:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-12-31 10:07:59,010 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2018-12-31 10:07:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:59,010 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-12-31 10:07:59,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-31 10:07:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-12-31 10:07:59,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-12-31 10:07:59,013 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:59,013 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:59,014 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:59,014 INFO L82 PathProgramCache]: Analyzing trace with hash 959677331, now seen corresponding path program 25 times [2018-12-31 10:07:59,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:59,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:59,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:59,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-12-31 10:08:00,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:00,794 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:00,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:00,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-12-31 10:08:01,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:01,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-12-31 10:08:01,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-12-31 10:08:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-12-31 10:08:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-12-31 10:08:01,481 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 55 states. [2018-12-31 10:08:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:03,246 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-12-31 10:08:03,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-31 10:08:03,248 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 159 [2018-12-31 10:08:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:03,250 INFO L225 Difference]: With dead ends: 93 [2018-12-31 10:08:03,250 INFO L226 Difference]: Without dead ends: 89 [2018-12-31 10:08:03,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-12-31 10:08:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-31 10:08:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-12-31 10:08:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-31 10:08:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-12-31 10:08:03,263 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 159 [2018-12-31 10:08:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:03,263 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-12-31 10:08:03,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-12-31 10:08:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-12-31 10:08:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-12-31 10:08:03,265 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:03,265 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:03,265 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1468417367, now seen corresponding path program 26 times [2018-12-31 10:08:03,265 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:03,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:03,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:03,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:03,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-12-31 10:08:03,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:08:03,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2018-12-31 10:08:03,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-31 10:08:03,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-31 10:08:03,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2018-12-31 10:08:03,824 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 31 states. [2018-12-31 10:08:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:04,845 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-12-31 10:08:04,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-31 10:08:04,846 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 165 [2018-12-31 10:08:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:04,847 INFO L225 Difference]: With dead ends: 89 [2018-12-31 10:08:04,847 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 10:08:04,849 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1220, Invalid=2086, Unknown=0, NotChecked=0, Total=3306 [2018-12-31 10:08:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 10:08:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 10:08:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 10:08:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 10:08:04,850 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 165 [2018-12-31 10:08:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:04,850 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 10:08:04,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-31 10:08:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 10:08:04,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 10:08:04,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 10:08:04,874 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 10:08:04,874 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-12-31 10:08:04,874 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 10:08:04,874 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 10:08:04,875 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-12-31 10:08:04,875 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-12-31 10:08:04,875 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 25) (<= 25 ULTIMATE.start_main_~input~0)) [2018-12-31 10:08:04,875 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-31 10:08:04,875 INFO L448 ceAbstractionStarter]: For program point L9(lines 9 15) no Hoare annotation was computed. [2018-12-31 10:08:04,875 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-12-31 10:08:04,875 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-12-31 10:08:04,875 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-12-31 10:08:04,876 INFO L444 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-12-31 10:08:04,876 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-31 10:08:04,876 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-12-31 10:08:04,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 10:08:04 BoogieIcfgContainer [2018-12-31 10:08:04,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 10:08:04,881 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 10:08:04,881 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 10:08:04,882 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 10:08:04,882 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:35" (3/4) ... [2018-12-31 10:08:04,886 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 10:08:04,893 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-12-31 10:08:04,897 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-31 10:08:04,897 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-31 10:08:04,939 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 10:08:04,939 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 10:08:04,941 INFO L168 Benchmark]: Toolchain (without parser) took 29920.66 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 399.0 MB). Free memory was 942.0 MB in the beginning and 905.1 MB in the end (delta: 36.8 MB). Peak memory consumption was 435.8 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:04,943 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:04,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.94 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 931.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:04,944 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.18 ms. Allocated memory is still 1.0 GB. Free memory is still 931.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:04,944 INFO L168 Benchmark]: Boogie Preprocessor took 21.01 ms. Allocated memory is still 1.0 GB. Free memory is still 931.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:04,945 INFO L168 Benchmark]: RCFGBuilder took 341.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 931.2 MB in the beginning and 1.1 GB in the end (delta: -193.8 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:04,945 INFO L168 Benchmark]: TraceAbstraction took 29217.83 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 259.0 MB). Free memory was 1.1 GB in the beginning and 905.1 MB in the end (delta: 219.9 MB). Peak memory consumption was 478.9 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:04,949 INFO L168 Benchmark]: Witness Printer took 58.37 ms. Allocated memory is still 1.4 GB. Free memory was 905.1 MB in the beginning and 905.1 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-12-31 10:08:04,953 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 235.94 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 931.2 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 38.18 ms. Allocated memory is still 1.0 GB. Free memory is still 931.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.01 ms. Allocated memory is still 1.0 GB. Free memory is still 931.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 341.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 931.2 MB in the beginning and 1.1 GB in the end (delta: -193.8 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 29217.83 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 259.0 MB). Free memory was 1.1 GB in the beginning and 905.1 MB in the end (delta: 219.9 MB). Peak memory consumption was 478.9 MB. Max. memory is 11.5 GB. * Witness Printer took 58.37 ms. Allocated memory is still 1.4 GB. Free memory was 905.1 MB in the beginning and 905.1 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 29.1s OverallTime, 27 OverallIterations, 27 TraceHistogramMax, 12.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 346 SDtfs, 783 SDslu, 4550 SDs, 0 SdLazy, 4030 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3339 GetRequests, 2528 SyntacticMatches, 2 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 17.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=26, 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: 0.2s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 15 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 4524 NumberOfCodeBlocks, 4524 NumberOfCodeBlocksAsserted, 224 NumberOfCheckSat, 4472 ConstructedInterpolants, 0 QuantifiedInterpolants, 1352032 SizeOfPredicates, 349 NumberOfNonLiveVariables, 5125 ConjunctsInSsa, 803 ConjunctsInUnsatCore, 52 InterpolantComputations, 2 PerfectInterpolantSequences, 18954/35854 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...