./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i --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/loop-lit/ddlm2013_true-unreach-call.i -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 17744505b3a424a40a1b2449004fea58677c1b94 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 06:14:10,462 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 06:14:10,464 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 06:14:10,476 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 06:14:10,477 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 06:14:10,479 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 06:14:10,480 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 06:14:10,485 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 06:14:10,486 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 06:14:10,487 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 06:14:10,491 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 06:14:10,491 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 06:14:10,492 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 06:14:10,495 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 06:14:10,498 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 06:14:10,499 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 06:14:10,500 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 06:14:10,502 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 06:14:10,504 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 06:14:10,506 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 06:14:10,507 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 06:14:10,508 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 06:14:10,511 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 06:14:10,512 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 06:14:10,512 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 06:14:10,513 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 06:14:10,514 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 06:14:10,515 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 06:14:10,516 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 06:14:10,517 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 06:14:10,517 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 06:14:10,518 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 06:14:10,518 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 06:14:10,518 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 06:14:10,519 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 06:14:10,520 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 06:14:10,520 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 06:14:10,536 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 06:14:10,537 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 06:14:10,538 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 06:14:10,538 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 06:14:10,538 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 06:14:10,538 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 06:14:10,539 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 06:14:10,539 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 06:14:10,539 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 06:14:10,539 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 06:14:10,539 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 06:14:10,540 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 06:14:10,540 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 06:14:10,540 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 06:14:10,540 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 06:14:10,540 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 06:14:10,540 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 06:14:10,541 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 06:14:10,541 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 06:14:10,541 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 06:14:10,541 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 06:14:10,541 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 06:14:10,541 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 06:14:10,542 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 06:14:10,542 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 06:14:10,542 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 06:14:10,542 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 06:14:10,542 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 06:14:10,543 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 -> 17744505b3a424a40a1b2449004fea58677c1b94 [2018-12-31 06:14:10,609 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 06:14:10,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 06:14:10,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 06:14:10,638 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 06:14:10,638 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 06:14:10,639 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i [2018-12-31 06:14:10,714 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bedee3868/2b1d8c3b0ee04384ad6a0ef2cc2213bc/FLAG29b864a72 [2018-12-31 06:14:11,109 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 06:14:11,110 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i [2018-12-31 06:14:11,116 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bedee3868/2b1d8c3b0ee04384ad6a0ef2cc2213bc/FLAG29b864a72 [2018-12-31 06:14:11,488 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bedee3868/2b1d8c3b0ee04384ad6a0ef2cc2213bc [2018-12-31 06:14:11,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 06:14:11,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 06:14:11,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 06:14:11,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 06:14:11,504 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 06:14:11,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a3a5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11, skipping insertion in model container [2018-12-31 06:14:11,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 06:14:11,537 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 06:14:11,763 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 06:14:11,769 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 06:14:11,795 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 06:14:11,814 INFO L195 MainTranslator]: Completed translation [2018-12-31 06:14:11,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11 WrapperNode [2018-12-31 06:14:11,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 06:14:11,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 06:14:11,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 06:14:11,816 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 06:14:11,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 06:14:11,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 06:14:11,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 06:14:11,857 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 06:14:11,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (1/1) ... [2018-12-31 06:14:11,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 06:14:11,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 06:14:11,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 06:14:11,890 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 06:14:11,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (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 06:14:12,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 06:14:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 06:14:12,402 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 06:14:12,403 INFO L280 CfgBuilder]: Removed 7 assue(true) statements. [2018-12-31 06:14:12,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 06:14:12 BoogieIcfgContainer [2018-12-31 06:14:12,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 06:14:12,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 06:14:12,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 06:14:12,408 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 06:14:12,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 06:14:11" (1/3) ... [2018-12-31 06:14:12,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d17cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 06:14:12, skipping insertion in model container [2018-12-31 06:14:12,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:14:11" (2/3) ... [2018-12-31 06:14:12,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d17cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 06:14:12, skipping insertion in model container [2018-12-31 06:14:12,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 06:14:12" (3/3) ... [2018-12-31 06:14:12,412 INFO L112 eAbstractionObserver]: Analyzing ICFG ddlm2013_true-unreach-call.i [2018-12-31 06:14:12,423 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 06:14:12,433 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 06:14:12,449 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 06:14:12,484 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 06:14:12,485 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 06:14:12,485 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 06:14:12,486 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 06:14:12,486 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 06:14:12,486 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 06:14:12,486 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 06:14:12,486 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 06:14:12,487 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 06:14:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-12-31 06:14:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-31 06:14:12,509 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:14:12,510 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-31 06:14:12,513 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:14:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:14:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 920569802, now seen corresponding path program 1 times [2018-12-31 06:14:12,522 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:14:12,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:14:12,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:12,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:14:12,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:14:12,628 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 06:14:12,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 06:14:12,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-31 06:14:12,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-31 06:14:12,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-31 06:14:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 06:14:12,650 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-12-31 06:14:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:14:12,666 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-12-31 06:14:12,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-31 06:14:12,667 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-12-31 06:14:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:14:12,679 INFO L225 Difference]: With dead ends: 21 [2018-12-31 06:14:12,679 INFO L226 Difference]: Without dead ends: 9 [2018-12-31 06:14:12,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 06:14:12,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-31 06:14:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-31 06:14:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-31 06:14:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-12-31 06:14:12,719 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2018-12-31 06:14:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:14:12,719 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-12-31 06:14:12,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-31 06:14:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-12-31 06:14:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-31 06:14:12,720 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:14:12,720 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-31 06:14:12,721 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:14:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:14:12,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1539532969, now seen corresponding path program 1 times [2018-12-31 06:14:12,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:14:12,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:14:12,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:12,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:14:12,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:14:13,119 WARN L181 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2018-12-31 06:14:13,138 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 06:14:13,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 06:14:13,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-31 06:14:13,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-31 06:14:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-31 06:14:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-31 06:14:13,143 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2018-12-31 06:14:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:14:13,218 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-12-31 06:14:13,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 06:14:13,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-12-31 06:14:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:14:13,221 INFO L225 Difference]: With dead ends: 15 [2018-12-31 06:14:13,221 INFO L226 Difference]: Without dead ends: 11 [2018-12-31 06:14:13,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 06:14:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-12-31 06:14:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-12-31 06:14:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-31 06:14:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-12-31 06:14:13,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2018-12-31 06:14:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:14:13,227 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-12-31 06:14:13,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-31 06:14:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-12-31 06:14:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-31 06:14:13,228 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:14:13,228 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 06:14:13,228 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:14:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:14:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1067556335, now seen corresponding path program 1 times [2018-12-31 06:14:13,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:14:13,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:14:13,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:13,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:14:13,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:14:13,784 WARN L181 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2018-12-31 06:14:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:14:13,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:14:13,844 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 06:14:13,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:14:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:14:13,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:14:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:14:14,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:14:14,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-12-31 06:14:14,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 06:14:14,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 06:14:14,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-31 06:14:14,163 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 10 states. [2018-12-31 06:14:14,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:14:14,383 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2018-12-31 06:14:14,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 06:14:14,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-12-31 06:14:14,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:14:14,386 INFO L225 Difference]: With dead ends: 20 [2018-12-31 06:14:14,386 INFO L226 Difference]: Without dead ends: 16 [2018-12-31 06:14:14,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-12-31 06:14:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-31 06:14:14,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2018-12-31 06:14:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 06:14:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2018-12-31 06:14:14,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2018-12-31 06:14:14,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:14:14,392 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2018-12-31 06:14:14,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 06:14:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2018-12-31 06:14:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-31 06:14:14,393 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:14:14,393 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 06:14:14,393 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:14:14,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:14:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash -387497965, now seen corresponding path program 1 times [2018-12-31 06:14:14,394 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:14:14,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:14:14,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:14,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:14:14,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:14:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 06:14:14,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 06:14:14,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-31 06:14:14,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-31 06:14:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-31 06:14:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 06:14:14,471 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2018-12-31 06:14:14,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:14:14,480 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2018-12-31 06:14:14,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-31 06:14:14,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-31 06:14:14,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:14:14,481 INFO L225 Difference]: With dead ends: 23 [2018-12-31 06:14:14,481 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 06:14:14,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 06:14:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 06:14:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-31 06:14:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 06:14:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-12-31 06:14:14,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-12-31 06:14:14,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:14:14,486 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-12-31 06:14:14,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-31 06:14:14,486 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-12-31 06:14:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-31 06:14:14,487 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:14:14,487 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-31 06:14:14,487 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:14:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:14:14,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2134579945, now seen corresponding path program 2 times [2018-12-31 06:14:14,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:14:14,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:14:14,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:14,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:14:14,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:14:14,733 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-31 06:14:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:14:15,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:14:15,132 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 06:14:15,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 06:14:15,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 06:14:15,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 06:14:15,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:14:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:14:15,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:14:15,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-12-31 06:14:15,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 06:14:15,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 06:14:15,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-12-31 06:14:15,648 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 14 states. [2018-12-31 06:14:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:14:16,009 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2018-12-31 06:14:16,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 06:14:16,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-12-31 06:14:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:14:16,012 INFO L225 Difference]: With dead ends: 41 [2018-12-31 06:14:16,013 INFO L226 Difference]: Without dead ends: 24 [2018-12-31 06:14:16,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-12-31 06:14:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-31 06:14:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2018-12-31 06:14:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 06:14:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-12-31 06:14:16,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-12-31 06:14:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:14:16,018 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-12-31 06:14:16,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 06:14:16,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-12-31 06:14:16,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-31 06:14:16,019 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:14:16,019 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 06:14:16,020 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:14:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:14:16,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2101929389, now seen corresponding path program 1 times [2018-12-31 06:14:16,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:14:16,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:14:16,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:16,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 06:14:16,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:14:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:14:18,265 WARN L181 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-12-31 06:14:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 06:14:18,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:14:18,279 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 06:14:18,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:14:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:14:18,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:14:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 06:14:18,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:14:18,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-12-31 06:14:18,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 06:14:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 06:14:18,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 06:14:18,420 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2018-12-31 06:14:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:14:18,701 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-12-31 06:14:18,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 06:14:18,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-12-31 06:14:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:14:18,703 INFO L225 Difference]: With dead ends: 22 [2018-12-31 06:14:18,704 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 06:14:18,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 06:14:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 06:14:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 06:14:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 06:14:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 06:14:18,706 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-12-31 06:14:18,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:14:18,706 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 06:14:18,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 06:14:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 06:14:18,709 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 06:14:18,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 06:14:18,753 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 06:14:18,754 INFO L451 ceAbstractionStarter]: At program point L31(lines 31 33) the Hoare annotation is: true [2018-12-31 06:14:18,754 INFO L448 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2018-12-31 06:14:18,754 INFO L448 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2018-12-31 06:14:18,754 INFO L448 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2018-12-31 06:14:18,754 INFO L448 ceAbstractionStarter]: For program point L21-2(lines 10 35) no Hoare annotation was computed. [2018-12-31 06:14:18,754 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-31 06:14:18,754 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-31 06:14:18,755 INFO L451 ceAbstractionStarter]: At program point L34(lines 10 35) the Hoare annotation is: true [2018-12-31 06:14:18,755 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 06:14:18,755 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 06:14:18,755 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2018-12-31 06:14:18,755 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-31 06:14:18,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 06:14:18 BoogieIcfgContainer [2018-12-31 06:14:18,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 06:14:18,774 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 06:14:18,774 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 06:14:18,774 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 06:14:18,775 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 06:14:12" (3/4) ... [2018-12-31 06:14:18,782 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 06:14:18,800 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-12-31 06:14:18,802 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-31 06:14:18,862 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 06:14:18,862 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 06:14:18,863 INFO L168 Benchmark]: Toolchain (without parser) took 7367.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 951.3 MB in the beginning and 926.0 MB in the end (delta: 25.4 MB). Peak memory consumption was 158.0 MB. Max. memory is 11.5 GB. [2018-12-31 06:14:18,864 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:14:18,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.22 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 06:14:18,865 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.90 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:14:18,866 INFO L168 Benchmark]: Boogie Preprocessor took 32.59 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:14:18,866 INFO L168 Benchmark]: RCFGBuilder took 514.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -162.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-31 06:14:18,867 INFO L168 Benchmark]: TraceAbstraction took 6369.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 926.0 MB in the end (delta: 177.2 MB). Peak memory consumption was 177.2 MB. Max. memory is 11.5 GB. [2018-12-31 06:14:18,867 INFO L168 Benchmark]: Witness Printer took 88.23 ms. Allocated memory is still 1.2 GB. Free memory is still 926.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:14:18,875 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 317.22 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.90 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.59 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 514.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -162.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6369.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 926.0 MB in the end (delta: 177.2 MB). Peak memory consumption was 177.2 MB. Max. memory is 11.5 GB. * Witness Printer took 88.23 ms. Allocated memory is still 1.2 GB. Free memory is still 926.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. SAFE Result, 6.2s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 33 SDslu, 123 SDs, 0 SdLazy, 139 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=5, 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: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 6562 SizeOfPredicates, 11 NumberOfNonLiveVariables, 158 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 26/50 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...