./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/id_i15_o15_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_i15_o15_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 946ca263ceeb3f3c46f4e6e15a44f3d7052d43ca ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:07:28,996 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 10:07:28,998 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 10:07:29,012 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 10:07:29,012 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 10:07:29,014 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 10:07:29,015 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 10:07:29,017 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 10:07:29,018 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 10:07:29,019 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 10:07:29,020 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 10:07:29,020 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 10:07:29,021 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 10:07:29,022 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 10:07:29,024 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 10:07:29,025 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 10:07:29,025 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 10:07:29,027 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 10:07:29,029 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 10:07:29,031 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 10:07:29,032 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 10:07:29,033 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 10:07:29,036 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 10:07:29,036 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 10:07:29,036 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 10:07:29,038 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 10:07:29,039 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 10:07:29,039 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 10:07:29,040 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 10:07:29,041 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 10:07:29,042 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 10:07:29,042 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 10:07:29,043 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 10:07:29,043 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 10:07:29,044 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 10:07:29,045 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 10:07:29,045 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 10:07:29,062 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 10:07:29,062 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 10:07:29,063 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 10:07:29,064 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 10:07:29,064 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 10:07:29,064 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 10:07:29,064 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 10:07:29,064 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 10:07:29,065 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 10:07:29,065 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 10:07:29,065 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 10:07:29,065 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 10:07:29,065 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 10:07:29,065 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 10:07:29,066 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 10:07:29,066 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 10:07:29,066 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 10:07:29,066 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 10:07:29,066 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 10:07:29,067 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 10:07:29,067 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 10:07:29,067 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:07:29,067 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 10:07:29,067 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 10:07:29,067 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 10:07:29,068 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 10:07:29,068 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 10:07:29,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 10:07:29,068 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 -> 946ca263ceeb3f3c46f4e6e15a44f3d7052d43ca [2018-12-31 10:07:29,125 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 10:07:29,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 10:07:29,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 10:07:29,143 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 10:07:29,143 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 10:07:29,144 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/id_i15_o15_true-unreach-call_true-termination.c [2018-12-31 10:07:29,201 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/461eae31b/26a265399dd44514926ea288d8cb499e/FLAGd54ffe241 [2018-12-31 10:07:29,648 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 10:07:29,649 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/id_i15_o15_true-unreach-call_true-termination.c [2018-12-31 10:07:29,656 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/461eae31b/26a265399dd44514926ea288d8cb499e/FLAGd54ffe241 [2018-12-31 10:07:29,989 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/461eae31b/26a265399dd44514926ea288d8cb499e [2018-12-31 10:07:29,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 10:07:29,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 10:07:30,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:30,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 10:07:30,009 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 10:07:30,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:29" (1/1) ... [2018-12-31 10:07:30,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e42a49a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30, skipping insertion in model container [2018-12-31 10:07:30,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:29" (1/1) ... [2018-12-31 10:07:30,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 10:07:30,048 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 10:07:30,293 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:30,300 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 10:07:30,321 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:30,340 INFO L195 MainTranslator]: Completed translation [2018-12-31 10:07:30,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30 WrapperNode [2018-12-31 10:07:30,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:30,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:30,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 10:07:30,342 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 10:07:30,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (1/1) ... [2018-12-31 10:07:30,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (1/1) ... [2018-12-31 10:07:30,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:30,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 10:07:30,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 10:07:30,388 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 10:07:30,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (1/1) ... [2018-12-31 10:07:30,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (1/1) ... [2018-12-31 10:07:30,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (1/1) ... [2018-12-31 10:07:30,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (1/1) ... [2018-12-31 10:07:30,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (1/1) ... [2018-12-31 10:07:30,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (1/1) ... [2018-12-31 10:07:30,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (1/1) ... [2018-12-31 10:07:30,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 10:07:30,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 10:07:30,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 10:07:30,410 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 10:07:30,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (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 10:07:30,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 10:07:30,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 10:07:30,536 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-31 10:07:30,537 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-31 10:07:30,737 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 10:07:30,737 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 10:07:30,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:30 BoogieIcfgContainer [2018-12-31 10:07:30,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 10:07:30,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 10:07:30,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 10:07:30,743 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 10:07:30,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 10:07:29" (1/3) ... [2018-12-31 10:07:30,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1873ad48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:30, skipping insertion in model container [2018-12-31 10:07:30,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:30" (2/3) ... [2018-12-31 10:07:30,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1873ad48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:30, skipping insertion in model container [2018-12-31 10:07:30,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:30" (3/3) ... [2018-12-31 10:07:30,748 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15_true-unreach-call_true-termination.c [2018-12-31 10:07:30,757 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 10:07:30,764 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 10:07:30,779 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 10:07:30,812 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 10:07:30,813 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 10:07:30,813 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 10:07:30,813 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 10:07:30,814 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 10:07:30,814 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 10:07:30,814 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 10:07:30,814 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 10:07:30,814 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 10:07:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-31 10:07:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 10:07:30,840 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:30,841 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:30,844 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2018-12-31 10:07:30,853 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:30,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:30,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:30,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:30,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:31,152 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 10:07:31,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:07:31,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:07:31,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:07:31,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:07:31,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:31,176 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2018-12-31 10:07:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:31,354 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-31 10:07:31,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:07:31,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 10:07:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:31,365 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:07:31,366 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 10:07:31,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 10:07:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-31 10:07:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 10:07:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-31 10:07:31,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-12-31 10:07:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:31,412 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-31 10:07:31,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:07:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-31 10:07:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-31 10:07:31,415 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:31,415 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:31,415 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2018-12-31 10:07:31,416 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:31,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:31,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:31,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:31,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:31,529 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 10:07:31,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:31,530 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 10:07:31,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:31,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:31,636 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 10:07:31,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:31,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 10:07:31,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 10:07:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 10:07:31,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:31,671 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2018-12-31 10:07:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:31,856 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-31 10:07:31,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 10:07:31,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-12-31 10:07:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:31,858 INFO L225 Difference]: With dead ends: 21 [2018-12-31 10:07:31,858 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 10:07:31,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:07:31,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 10:07:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-31 10:07:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:07:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-31 10:07:31,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-12-31 10:07:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:31,867 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-31 10:07:31,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 10:07:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-31 10:07:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-31 10:07:31,869 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:31,870 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:31,870 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2018-12-31 10:07:31,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:31,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:31,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:31,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:31,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:32,117 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 10:07:32,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:32,118 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 10:07:32,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:32,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:32,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:32,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:32,231 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 10:07:32,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:32,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-31 10:07:32,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 10:07:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 10:07:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-31 10:07:32,259 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2018-12-31 10:07:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:32,401 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-31 10:07:32,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 10:07:32,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-12-31 10:07:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:32,404 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:07:32,404 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 10:07:32,405 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 10:07:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 10:07:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-31 10:07:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 10:07:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-31 10:07:32,414 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2018-12-31 10:07:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:32,415 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-31 10:07:32,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 10:07:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-31 10:07:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-31 10:07:32,417 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:32,417 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:32,419 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2018-12-31 10:07:32,419 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:32,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:32,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:32,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:32,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:32,649 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 10:07:32,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:32,649 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 10:07:32,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:32,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 10:07:32,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:32,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:32,711 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 10:07:32,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:32,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-31 10:07:32,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 10:07:32,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 10:07:32,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:07:32,739 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2018-12-31 10:07:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:32,945 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-31 10:07:32,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:07:32,948 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-12-31 10:07:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:32,950 INFO L225 Difference]: With dead ends: 27 [2018-12-31 10:07:32,950 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 10:07:32,953 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 10:07:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 10:07:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 10:07:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 10:07:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-31 10:07:32,964 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2018-12-31 10:07:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:32,964 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-31 10:07:32,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 10:07:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-31 10:07:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 10:07:32,971 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:32,971 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:32,971 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2018-12-31 10:07:32,974 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:32,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:32,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:32,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:32,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:33,404 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 10:07:33,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:33,405 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 10:07:33,424 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:33,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:33,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:33,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:33,468 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 10:07:33,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:33,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-31 10:07:33,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 10:07:33,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 10:07:33,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-31 10:07:33,491 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-12-31 10:07:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:33,639 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-12-31 10:07:33,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 10:07:33,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 10:07:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:33,643 INFO L225 Difference]: With dead ends: 30 [2018-12-31 10:07:33,644 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 10:07:33,644 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 10:07:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 10:07:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-31 10:07:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 10:07:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-31 10:07:33,651 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2018-12-31 10:07:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:33,651 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-31 10:07:33,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 10:07:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-31 10:07:33,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-31 10:07:33,653 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:33,653 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:33,654 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:33,654 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2018-12-31 10:07:33,654 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:33,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:33,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:33,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:33,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:33,829 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 10:07:33,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:33,830 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 10:07:33,852 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:33,882 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-31 10:07:33,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:33,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:33,922 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 10:07:33,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:33,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-31 10:07:33,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 10:07:33,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 10:07:33,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:07:33,946 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2018-12-31 10:07:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:34,164 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-12-31 10:07:34,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 10:07:34,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-31 10:07:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:34,168 INFO L225 Difference]: With dead ends: 33 [2018-12-31 10:07:34,168 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 10:07:34,169 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 10:07:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 10:07:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-31 10:07:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-31 10:07:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-31 10:07:34,175 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2018-12-31 10:07:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:34,175 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-31 10:07:34,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 10:07:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-31 10:07:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 10:07:34,177 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:34,177 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:34,178 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:34,178 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2018-12-31 10:07:34,178 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:34,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:34,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:34,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:34,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:34,429 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 10:07:34,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:34,430 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 10:07:34,443 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:34,475 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-31 10:07:34,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:34,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:34,517 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 10:07:34,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:34,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-31 10:07:34,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 10:07:34,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 10:07:34,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-31 10:07:34,541 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2018-12-31 10:07:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:34,719 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-31 10:07:34,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 10:07:34,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2018-12-31 10:07:34,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:34,721 INFO L225 Difference]: With dead ends: 36 [2018-12-31 10:07:34,721 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 10:07:34,722 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 10:07:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 10:07:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-31 10:07:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-31 10:07:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-12-31 10:07:34,728 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2018-12-31 10:07:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:34,729 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-12-31 10:07:34,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 10:07:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-12-31 10:07:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-31 10:07:34,731 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:34,731 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:34,731 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:34,732 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2018-12-31 10:07:34,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:34,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:34,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:34,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:34,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:35,058 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 10:07:35,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:35,059 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 10:07:35,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:35,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:35,116 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 10:07:35,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:35,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-12-31 10:07:35,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 10:07:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 10:07:35,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:07:35,138 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2018-12-31 10:07:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:35,450 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-31 10:07:35,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 10:07:35,451 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2018-12-31 10:07:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:35,452 INFO L225 Difference]: With dead ends: 39 [2018-12-31 10:07:35,452 INFO L226 Difference]: Without dead ends: 35 [2018-12-31 10:07:35,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:07:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-31 10:07:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-31 10:07:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-31 10:07:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-31 10:07:35,461 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2018-12-31 10:07:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:35,462 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-31 10:07:35,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 10:07:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-31 10:07:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 10:07:35,464 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:35,464 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:35,464 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:35,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2018-12-31 10:07:35,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:35,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:35,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:35,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:35,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:35,770 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 10:07:35,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:35,771 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 10:07:35,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:35,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:35,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:35,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:35,873 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 10:07:35,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:35,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-31 10:07:35,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 10:07:35,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 10:07:35,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-31 10:07:35,896 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2018-12-31 10:07:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:36,109 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2018-12-31 10:07:36,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 10:07:36,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-12-31 10:07:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:36,112 INFO L225 Difference]: With dead ends: 42 [2018-12-31 10:07:36,112 INFO L226 Difference]: Without dead ends: 38 [2018-12-31 10:07:36,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-12-31 10:07:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-31 10:07:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-12-31 10:07:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-31 10:07:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-12-31 10:07:36,119 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2018-12-31 10:07:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:36,120 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-12-31 10:07:36,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 10:07:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-12-31 10:07:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-31 10:07:36,121 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:36,121 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:36,122 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2018-12-31 10:07:36,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:36,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:36,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:36,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:36,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:36,444 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 10:07:36,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:36,445 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 10:07:36,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:36,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-31 10:07:36,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:36,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:36,649 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 10:07:36,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:36,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-31 10:07:36,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 10:07:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 10:07:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:07:36,693 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2018-12-31 10:07:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:37,032 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-12-31 10:07:37,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 10:07:37,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2018-12-31 10:07:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:37,034 INFO L225 Difference]: With dead ends: 45 [2018-12-31 10:07:37,034 INFO L226 Difference]: Without dead ends: 41 [2018-12-31 10:07:37,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:07:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-31 10:07:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-31 10:07:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-31 10:07:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-31 10:07:37,043 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2018-12-31 10:07:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:37,043 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-31 10:07:37,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 10:07:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-31 10:07:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 10:07:37,047 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:37,048 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:37,048 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2018-12-31 10:07:37,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:37,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:37,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:37,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:37,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:37,248 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 10:07:37,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:37,248 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 10:07:37,265 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:37,313 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:37,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:37,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:37,373 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 10:07:37,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:37,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-31 10:07:37,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-31 10:07:37,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-31 10:07:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-31 10:07:37,394 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-12-31 10:07:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:37,745 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-31 10:07:37,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 10:07:37,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2018-12-31 10:07:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:37,748 INFO L225 Difference]: With dead ends: 48 [2018-12-31 10:07:37,748 INFO L226 Difference]: Without dead ends: 44 [2018-12-31 10:07:37,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-31 10:07:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-31 10:07:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-31 10:07:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-31 10:07:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-12-31 10:07:37,756 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2018-12-31 10:07:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:37,756 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-12-31 10:07:37,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-31 10:07:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-12-31 10:07:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-31 10:07:37,758 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:37,758 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:37,758 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:37,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:37,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2018-12-31 10:07:37,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:37,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:37,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:37,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:37,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:38,029 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 10:07:38,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:38,030 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 10:07:38,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:38,072 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-31 10:07:38,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:38,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:38,119 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 10:07:38,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:38,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-31 10:07:38,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 10:07:38,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 10:07:38,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:07:38,158 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2018-12-31 10:07:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:38,719 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-12-31 10:07:38,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 10:07:38,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2018-12-31 10:07:38,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:38,722 INFO L225 Difference]: With dead ends: 51 [2018-12-31 10:07:38,722 INFO L226 Difference]: Without dead ends: 47 [2018-12-31 10:07:38,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-31 10:07:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-31 10:07:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-31 10:07:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-31 10:07:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-12-31 10:07:38,730 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2018-12-31 10:07:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:38,730 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-12-31 10:07:38,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 10:07:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-12-31 10:07:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-31 10:07:38,732 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:38,732 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:38,732 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:38,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:38,733 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2018-12-31 10:07:38,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:38,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:38,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:38,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:38,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:39,140 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 10:07:39,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:39,141 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 10:07:39,151 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:39,233 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-31 10:07:39,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:39,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:39,322 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 10:07:39,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:39,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-31 10:07:39,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 10:07:39,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 10:07:39,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-12-31 10:07:39,360 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2018-12-31 10:07:39,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:39,630 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2018-12-31 10:07:39,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 10:07:39,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2018-12-31 10:07:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:39,633 INFO L225 Difference]: With dead ends: 54 [2018-12-31 10:07:39,633 INFO L226 Difference]: Without dead ends: 50 [2018-12-31 10:07:39,635 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-12-31 10:07:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-31 10:07:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-12-31 10:07:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-31 10:07:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-12-31 10:07:39,642 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2018-12-31 10:07:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:39,642 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-12-31 10:07:39,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 10:07:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-12-31 10:07:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-12-31 10:07:39,645 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:39,645 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:39,646 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2018-12-31 10:07:39,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:39,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:39,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:39,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:39,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:39,942 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 10:07:39,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:39,943 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:07:39,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:39,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:40,024 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 10:07:40,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:40,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-12-31 10:07:40,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 10:07:40,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 10:07:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:07:40,055 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2018-12-31 10:07:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:40,380 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-12-31 10:07:40,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 10:07:40,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2018-12-31 10:07:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:40,383 INFO L225 Difference]: With dead ends: 57 [2018-12-31 10:07:40,383 INFO L226 Difference]: Without dead ends: 53 [2018-12-31 10:07:40,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-12-31 10:07:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-31 10:07:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-12-31 10:07:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-31 10:07:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-12-31 10:07:40,391 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2018-12-31 10:07:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:40,392 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-12-31 10:07:40,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 10:07:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-12-31 10:07:40,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-31 10:07:40,393 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:40,393 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:40,393 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:40,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:40,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2018-12-31 10:07:40,394 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:40,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:40,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:40,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:40,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:40,738 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 10:07:40,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:40,738 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 10:07:40,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:40,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:40,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:40,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:40,819 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 10:07:40,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:40,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-12-31 10:07:40,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-31 10:07:40,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-31 10:07:40,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-12-31 10:07:40,849 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2018-12-31 10:07:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:41,210 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2018-12-31 10:07:41,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-31 10:07:41,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2018-12-31 10:07:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:41,212 INFO L225 Difference]: With dead ends: 60 [2018-12-31 10:07:41,213 INFO L226 Difference]: Without dead ends: 56 [2018-12-31 10:07:41,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 10:07:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-31 10:07:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-31 10:07:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-31 10:07:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-12-31 10:07:41,226 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2018-12-31 10:07:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:41,226 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-12-31 10:07:41,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-31 10:07:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-12-31 10:07:41,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-12-31 10:07:41,229 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:41,229 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:41,229 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:41,230 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2018-12-31 10:07:41,230 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:41,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:41,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:41,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:41,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:41,993 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 10:07:41,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:41,993 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 10:07:42,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:42,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-31 10:07:42,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:42,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:42,146 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 10:07:42,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:42,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-12-31 10:07:42,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-31 10:07:42,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-31 10:07:42,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-12-31 10:07:42,184 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 35 states. [2018-12-31 10:07:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:43,085 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-12-31 10:07:43,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-31 10:07:43,087 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2018-12-31 10:07:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:43,088 INFO L225 Difference]: With dead ends: 63 [2018-12-31 10:07:43,089 INFO L226 Difference]: Without dead ends: 59 [2018-12-31 10:07:43,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-12-31 10:07:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-31 10:07:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-31 10:07:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-31 10:07:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-12-31 10:07:43,097 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2018-12-31 10:07:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:43,098 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-12-31 10:07:43,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-31 10:07:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-12-31 10:07:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-12-31 10:07:43,099 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:43,099 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:43,102 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:43,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2018-12-31 10:07:43,103 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:43,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:43,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:43,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:43,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-12-31 10:07:44,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:07:44,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2018-12-31 10:07:44,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 10:07:44,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 10:07:44,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-12-31 10:07:44,029 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2018-12-31 10:07:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:44,318 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-12-31 10:07:44,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-31 10:07:44,319 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2018-12-31 10:07:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:44,320 INFO L225 Difference]: With dead ends: 59 [2018-12-31 10:07:44,320 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 10:07:44,323 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-12-31 10:07:44,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 10:07:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 10:07:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 10:07:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 10:07:44,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2018-12-31 10:07:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:44,324 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 10:07:44,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 10:07:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 10:07:44,324 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 10:07:44,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 10:07:44,372 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 10:07:44,372 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 10:07:44,372 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 10:07:44,372 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-12-31 10:07:44,372 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-12-31 10:07:44,372 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-12-31 10:07:44,373 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 15) (<= 15 ULTIMATE.start_main_~input~0)) [2018-12-31 10:07:44,373 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-31 10:07:44,373 INFO L448 ceAbstractionStarter]: For program point L9(lines 9 15) no Hoare annotation was computed. [2018-12-31 10:07:44,373 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-12-31 10:07:44,373 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-12-31 10:07:44,373 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-12-31 10:07:44,373 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 10:07:44,373 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-31 10:07:44,374 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-12-31 10:07:44,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 10:07:44 BoogieIcfgContainer [2018-12-31 10:07:44,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 10:07:44,377 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 10:07:44,377 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 10:07:44,378 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 10:07:44,378 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:30" (3/4) ... [2018-12-31 10:07:44,382 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 10:07:44,389 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-12-31 10:07:44,394 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-31 10:07:44,395 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-31 10:07:44,440 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 10:07:44,441 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 10:07:44,442 INFO L168 Benchmark]: Toolchain (without parser) took 14446.99 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 309.3 MB). Free memory was 946.0 MB in the beginning and 1.2 GB in the end (delta: -220.4 MB). Peak memory consumption was 89.0 MB. Max. memory is 11.5 GB. [2018-12-31 10:07:44,444 INFO L168 Benchmark]: CDTParser took 0.18 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 10:07:44,444 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.28 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:07:44,444 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.41 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:07:44,445 INFO L168 Benchmark]: Boogie Preprocessor took 21.51 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:07:44,445 INFO L168 Benchmark]: RCFGBuilder took 328.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -186.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:07:44,446 INFO L168 Benchmark]: TraceAbstraction took 13637.74 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 163.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -53.1 MB). Peak memory consumption was 110.0 MB. Max. memory is 11.5 GB. [2018-12-31 10:07:44,447 INFO L168 Benchmark]: Witness Printer took 63.34 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 8.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 11.5 GB. [2018-12-31 10:07:44,451 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 341.28 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 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 44.41 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.51 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 328.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -186.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13637.74 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 163.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -53.1 MB). Peak memory consumption was 110.0 MB. Max. memory is 11.5 GB. * Witness Printer took 63.34 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 8.5 MB). Peak memory consumption was 8.5 MB. 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, 13.5s OverallTime, 17 OverallIterations, 17 TraceHistogramMax, 5.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 216 SDtfs, 323 SDslu, 1908 SDs, 0 SdLazy, 1613 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1334 GetRequests, 994 SyntacticMatches, 1 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 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, 0.8s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 1824 NumberOfCodeBlocks, 1824 NumberOfCodeBlocksAsserted, 98 NumberOfCheckSat, 1792 ConstructedInterpolants, 0 QuantifiedInterpolants, 350752 SizeOfPredicates, 134 NumberOfNonLiveVariables, 2025 ConjunctsInSsa, 333 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 4624/8464 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...