./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loops/heavy_true-unreach-call.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/loops/heavy_true-unreach-call.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 63303d7ef35f153a8bd897bdcb496a54fed422c9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 06:22:08,343 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 06:22:08,344 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 06:22:08,356 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 06:22:08,357 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 06:22:08,358 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 06:22:08,359 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 06:22:08,361 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 06:22:08,363 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 06:22:08,363 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 06:22:08,364 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 06:22:08,365 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 06:22:08,366 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 06:22:08,367 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 06:22:08,368 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 06:22:08,368 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 06:22:08,369 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 06:22:08,371 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 06:22:08,373 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 06:22:08,375 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 06:22:08,376 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 06:22:08,378 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 06:22:08,380 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 06:22:08,381 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 06:22:08,381 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 06:22:08,382 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 06:22:08,383 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 06:22:08,384 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 06:22:08,385 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 06:22:08,386 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 06:22:08,386 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 06:22:08,387 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 06:22:08,387 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 06:22:08,388 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 06:22:08,389 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 06:22:08,389 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 06:22:08,390 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 06:22:08,405 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 06:22:08,406 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 06:22:08,407 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 06:22:08,407 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 06:22:08,407 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 06:22:08,408 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 06:22:08,408 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 06:22:08,408 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 06:22:08,408 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 06:22:08,408 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 06:22:08,408 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 06:22:08,409 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 06:22:08,409 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 06:22:08,409 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 06:22:08,409 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 06:22:08,409 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 06:22:08,409 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 06:22:08,410 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 06:22:08,410 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 06:22:08,410 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 06:22:08,410 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 06:22:08,410 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 06:22:08,411 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 06:22:08,411 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 06:22:08,411 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 06:22:08,411 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 06:22:08,411 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 06:22:08,411 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 06:22:08,412 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 -> 63303d7ef35f153a8bd897bdcb496a54fed422c9 [2018-12-31 06:22:08,460 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 06:22:08,479 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 06:22:08,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 06:22:08,488 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 06:22:08,489 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 06:22:08,490 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/heavy_true-unreach-call.c [2018-12-31 06:22:08,553 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d1e11d42/1ea0c13fd1b84bef83d7ad09714b8cae/FLAG83c5d8ac0 [2018-12-31 06:22:08,970 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 06:22:08,971 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/heavy_true-unreach-call.c [2018-12-31 06:22:08,978 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d1e11d42/1ea0c13fd1b84bef83d7ad09714b8cae/FLAG83c5d8ac0 [2018-12-31 06:22:09,341 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d1e11d42/1ea0c13fd1b84bef83d7ad09714b8cae [2018-12-31 06:22:09,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 06:22:09,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 06:22:09,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 06:22:09,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 06:22:09,351 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 06:22:09,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 06:22:09" (1/1) ... [2018-12-31 06:22:09,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b2078f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:09, skipping insertion in model container [2018-12-31 06:22:09,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 06:22:09" (1/1) ... [2018-12-31 06:22:09,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 06:22:09,385 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 06:22:09,638 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 06:22:16,625 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 06:22:16,648 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 06:22:16,743 INFO L195 MainTranslator]: Completed translation [2018-12-31 06:22:16,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16 WrapperNode [2018-12-31 06:22:16,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 06:22:16,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 06:22:16,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 06:22:16,746 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 06:22:16,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (1/1) ... [2018-12-31 06:22:16,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (1/1) ... [2018-12-31 06:22:16,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 06:22:16,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 06:22:16,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 06:22:16,798 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 06:22:16,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (1/1) ... [2018-12-31 06:22:16,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (1/1) ... [2018-12-31 06:22:16,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (1/1) ... [2018-12-31 06:22:16,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (1/1) ... [2018-12-31 06:22:16,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (1/1) ... [2018-12-31 06:22:16,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (1/1) ... [2018-12-31 06:22:16,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (1/1) ... [2018-12-31 06:22:16,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 06:22:16,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 06:22:16,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 06:22:16,847 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 06:22:16,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (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 06:22:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-31 06:22:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 06:22:16,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 06:22:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-31 06:22:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-12-31 06:22:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2018-12-31 06:22:18,346 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 06:22:18,346 INFO L280 CfgBuilder]: Removed 7 assue(true) statements. [2018-12-31 06:22:18,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 06:22:18 BoogieIcfgContainer [2018-12-31 06:22:18,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 06:22:18,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 06:22:18,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 06:22:18,354 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 06:22:18,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 06:22:09" (1/3) ... [2018-12-31 06:22:18,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e94d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 06:22:18, skipping insertion in model container [2018-12-31 06:22:18,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 06:22:16" (2/3) ... [2018-12-31 06:22:18,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e94d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 06:22:18, skipping insertion in model container [2018-12-31 06:22:18,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 06:22:18" (3/3) ... [2018-12-31 06:22:18,360 INFO L112 eAbstractionObserver]: Analyzing ICFG heavy_true-unreach-call.c [2018-12-31 06:22:18,373 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 06:22:18,383 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 06:22:18,404 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 06:22:18,451 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 06:22:18,452 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 06:22:18,452 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 06:22:18,452 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 06:22:18,452 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 06:22:18,452 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 06:22:18,453 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 06:22:18,453 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 06:22:18,453 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 06:22:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-12-31 06:22:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-31 06:22:18,480 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:22:18,481 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-31 06:22:18,484 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:22:18,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:22:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash 28726599, now seen corresponding path program 1 times [2018-12-31 06:22:18,496 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:22:18,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:22:18,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:18,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:22:18,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:22:18,658 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 06:22:18,661 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 06:22:18,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-31 06:22:18,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-31 06:22:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-31 06:22:18,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-31 06:22:18,686 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-12-31 06:22:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:22:18,702 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2018-12-31 06:22:18,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-31 06:22:18,704 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2018-12-31 06:22:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:22:18,714 INFO L225 Difference]: With dead ends: 26 [2018-12-31 06:22:18,714 INFO L226 Difference]: Without dead ends: 11 [2018-12-31 06:22:18,718 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 06:22:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-12-31 06:22:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-12-31 06:22:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-31 06:22:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-12-31 06:22:18,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2018-12-31 06:22:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:22:18,756 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-12-31 06:22:18,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-31 06:22:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-12-31 06:22:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-31 06:22:18,757 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:22:18,757 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-31 06:22:18,758 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:22:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:22:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash 28697769, now seen corresponding path program 1 times [2018-12-31 06:22:18,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:22:18,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:22:18,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:18,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:22:18,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:22:18,835 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 06:22:18,835 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 06:22:18,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-31 06:22:18,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-31 06:22:18,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-31 06:22:18,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 06:22:18,839 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 3 states. [2018-12-31 06:22:18,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:22:18,938 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-12-31 06:22:18,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-31 06:22:18,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-12-31 06:22:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:22:18,940 INFO L225 Difference]: With dead ends: 20 [2018-12-31 06:22:18,940 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 06:22:18,941 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 06:22:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 06:22:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2018-12-31 06:22:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-31 06:22:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-12-31 06:22:18,945 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2018-12-31 06:22:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:22:18,945 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-12-31 06:22:18,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-31 06:22:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-12-31 06:22:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-31 06:22:18,946 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:22:18,946 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 06:22:18,946 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:22:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:22:18,947 INFO L82 PathProgramCache]: Analyzing trace with hash 269702257, now seen corresponding path program 1 times [2018-12-31 06:22:18,947 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:22:18,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:22:18,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:18,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:22:18,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:22:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:22:19,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:22:19,092 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 06:22:19,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:22:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:22:19,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:22:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 06:22:19,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-31 06:22:19,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2018-12-31 06:22:19,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 06:22:19,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 06:22:19,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-31 06:22:19,174 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-12-31 06:22:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:22:19,387 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2018-12-31 06:22:19,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 06:22:19,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-12-31 06:22:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:22:19,389 INFO L225 Difference]: With dead ends: 44 [2018-12-31 06:22:19,389 INFO L226 Difference]: Without dead ends: 35 [2018-12-31 06:22:19,390 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-12-31 06:22:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-31 06:22:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-12-31 06:22:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 06:22:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2018-12-31 06:22:19,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 8 [2018-12-31 06:22:19,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:22:19,401 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2018-12-31 06:22:19,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 06:22:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2018-12-31 06:22:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-31 06:22:19,402 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:22:19,402 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-12-31 06:22:19,402 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:22:19,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:22:19,409 INFO L82 PathProgramCache]: Analyzing trace with hash 748709473, now seen corresponding path program 1 times [2018-12-31 06:22:19,409 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:22:19,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:22:19,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:19,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:22:19,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:22:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 06:22:19,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:22:19,686 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 06:22:19,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:22:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:22:19,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:22:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-31 06:22:19,789 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-31 06:22:19,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2018-12-31 06:22:19,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 06:22:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 06:22:19,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 06:22:19,791 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 6 states. [2018-12-31 06:22:20,203 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-12-31 06:22:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:22:20,286 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2018-12-31 06:22:20,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 06:22:20,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-31 06:22:20,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:22:20,288 INFO L225 Difference]: With dead ends: 57 [2018-12-31 06:22:20,288 INFO L226 Difference]: Without dead ends: 41 [2018-12-31 06:22:20,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-12-31 06:22:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-31 06:22:20,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-12-31 06:22:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-31 06:22:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2018-12-31 06:22:20,299 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2018-12-31 06:22:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:22:20,299 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2018-12-31 06:22:20,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 06:22:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2018-12-31 06:22:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-31 06:22:20,300 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:22:20,300 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-12-31 06:22:20,301 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:22:20,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:22:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1407774839, now seen corresponding path program 1 times [2018-12-31 06:22:20,301 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:22:20,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:22:20,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:20,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:22:20,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:22:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-31 06:22:20,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:22:20,641 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 06:22:20,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:22:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:22:20,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:22:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-31 06:22:20,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 06:22:20,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2018-12-31 06:22:20,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 06:22:20,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 06:22:20,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-31 06:22:20,879 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 7 states. [2018-12-31 06:22:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:22:21,324 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2018-12-31 06:22:21,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 06:22:21,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2018-12-31 06:22:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:22:21,325 INFO L225 Difference]: With dead ends: 80 [2018-12-31 06:22:21,325 INFO L226 Difference]: Without dead ends: 54 [2018-12-31 06:22:21,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-12-31 06:22:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-31 06:22:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2018-12-31 06:22:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-31 06:22:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2018-12-31 06:22:21,338 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 29 [2018-12-31 06:22:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:22:21,338 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2018-12-31 06:22:21,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 06:22:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2018-12-31 06:22:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-31 06:22:21,340 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 06:22:21,340 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-12-31 06:22:21,340 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 06:22:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 06:22:21,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2079427873, now seen corresponding path program 2 times [2018-12-31 06:22:21,341 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 06:22:21,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 06:22:21,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:21,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 06:22:21,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 06:22:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 06:22:21,961 WARN L181 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-12-31 06:22:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-12-31 06:22:21,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 06:22:21,966 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 06:22:21,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 06:22:22,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-31 06:22:22,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 06:22:22,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 06:22:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-12-31 06:22:22,181 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-31 06:22:22,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2018-12-31 06:22:22,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 06:22:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 06:22:22,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-31 06:22:22,183 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 7 states. [2018-12-31 06:22:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 06:22:22,319 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2018-12-31 06:22:22,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 06:22:22,319 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2018-12-31 06:22:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 06:22:22,320 INFO L225 Difference]: With dead ends: 63 [2018-12-31 06:22:22,320 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 06:22:22,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-12-31 06:22:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 06:22:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 06:22:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 06:22:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 06:22:22,322 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2018-12-31 06:22:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 06:22:22,322 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 06:22:22,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 06:22:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 06:22:22,323 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 06:22:22,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 06:22:22,432 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 06:22:22,432 INFO L448 ceAbstractionStarter]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2018-12-31 06:22:22,432 INFO L444 ceAbstractionStarter]: At program point L11-3(lines 11 13) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 1) [2018-12-31 06:22:22,433 INFO L448 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-12-31 06:22:22,433 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 06:22:22,433 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 06:22:22,433 INFO L451 ceAbstractionStarter]: At program point L20(lines 5 21) the Hoare annotation is: true [2018-12-31 06:22:22,433 INFO L444 ceAbstractionStarter]: At program point L16(lines 6 21) the Hoare annotation is: false [2018-12-31 06:22:22,433 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2018-12-31 06:22:22,433 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2018-12-31 06:22:22,434 INFO L444 ceAbstractionStarter]: At program point L12-3(lines 12 13) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 1) [2018-12-31 06:22:22,434 INFO L448 ceAbstractionStarter]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2018-12-31 06:22:22,434 INFO L444 ceAbstractionStarter]: At program point L10-3(lines 10 13) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 1) [2018-12-31 06:22:22,434 INFO L448 ceAbstractionStarter]: For program point L10-4(lines 6 21) no Hoare annotation was computed. [2018-12-31 06:22:22,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 06:22:22 BoogieIcfgContainer [2018-12-31 06:22:22,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 06:22:22,448 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 06:22:22,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 06:22:22,448 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 06:22:22,449 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 06:22:18" (3/4) ... [2018-12-31 06:22:22,453 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 06:22:22,464 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-31 06:22:22,465 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-31 06:22:22,465 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-31 06:22:22,520 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 06:22:22,521 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 06:22:22,522 INFO L168 Benchmark]: Toolchain (without parser) took 13176.16 ms. Allocated memory was 1.0 GB in the beginning and 3.0 GB in the end (delta: 1.9 GB). Free memory was 952.7 MB in the beginning and 1.6 GB in the end (delta: -600.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2018-12-31 06:22:22,523 INFO L168 Benchmark]: CDTParser took 0.61 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 06:22:22,523 INFO L168 Benchmark]: CACSL2BoogieTranslator took 7397.69 ms. Allocated memory was 1.0 GB in the beginning and 2.8 GB in the end (delta: 1.8 GB). Free memory was 952.7 MB in the beginning and 1.0 GB in the end (delta: -69.0 MB). Peak memory consumption was 1.7 GB. Max. memory is 11.5 GB. [2018-12-31 06:22:22,524 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.55 ms. Allocated memory is still 2.8 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:22:22,525 INFO L168 Benchmark]: Boogie Preprocessor took 49.19 ms. Allocated memory is still 2.8 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:22:22,530 INFO L168 Benchmark]: RCFGBuilder took 1500.36 ms. Allocated memory was 2.8 GB in the beginning and 3.0 GB in the end (delta: 163.1 MB). Free memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: -758.8 MB). Peak memory consumption was 363.2 MB. Max. memory is 11.5 GB. [2018-12-31 06:22:22,531 INFO L168 Benchmark]: TraceAbstraction took 4098.05 ms. Allocated memory is still 3.0 GB. Free memory was 1.8 GB in the beginning and 1.6 GB in the end (delta: 227.0 MB). Peak memory consumption was 227.0 MB. Max. memory is 11.5 GB. [2018-12-31 06:22:22,532 INFO L168 Benchmark]: Witness Printer took 72.56 ms. Allocated memory is still 3.0 GB. Free memory is still 1.6 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 06:22:22,536 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 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 7397.69 ms. Allocated memory was 1.0 GB in the beginning and 2.8 GB in the end (delta: 1.8 GB). Free memory was 952.7 MB in the beginning and 1.0 GB in the end (delta: -69.0 MB). Peak memory consumption was 1.7 GB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 51.55 ms. Allocated memory is still 2.8 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 49.19 ms. Allocated memory is still 2.8 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 1500.36 ms. Allocated memory was 2.8 GB in the beginning and 3.0 GB in the end (delta: 163.1 MB). Free memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: -758.8 MB). Peak memory consumption was 363.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4098.05 ms. Allocated memory is still 3.0 GB. Free memory was 1.8 GB in the beginning and 1.6 GB in the end (delta: 227.0 MB). Peak memory consumption was 227.0 MB. Max. memory is 11.5 GB. * Witness Printer took 72.56 ms. Allocated memory is still 3.0 GB. Free memory is still 1.6 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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: 6]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. SAFE Result, 4.0s OverallTime, 6 OverallIterations, 8 TraceHistogramMax, 1.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 73 SDtfs, 126 SDslu, 120 SDs, 0 SdLazy, 159 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 42 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 40 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 757 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 202 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 18090 SizeOfPredicates, 7 NumberOfNonLiveVariables, 214 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 268/376 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...