./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loops/for_bounded_loop1_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e 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/for_bounded_loop1_false-unreach-call_true-termination.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 0ab550a6e9aa370752671d7ad69781384c889e75 ............................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:16:43,363 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:16:43,365 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:16:43,377 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:16:43,377 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:16:43,378 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:16:43,380 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:16:43,389 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:16:43,391 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:16:43,392 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:16:43,393 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:16:43,393 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:16:43,394 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:16:43,395 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:16:43,396 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:16:43,397 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:16:43,398 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:16:43,400 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:16:43,403 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:16:43,404 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:16:43,405 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:16:43,406 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:16:43,409 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:16:43,409 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:16:43,409 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:16:43,410 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:16:43,412 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:16:43,413 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:16:43,414 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:16:43,415 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:16:43,415 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:16:43,416 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:16:43,416 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:16:43,416 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:16:43,418 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:16:43,419 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:16:43,419 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:16:43,439 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:16:43,441 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:16:43,442 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:16:43,442 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:16:43,443 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:16:43,443 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:16:43,443 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:16:43,446 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:16:43,446 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:16:43,446 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:16:43,447 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:16:43,447 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:16:43,447 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:16:43,447 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:16:43,447 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:16:43,447 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:16:43,448 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:16:43,448 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:16:43,448 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:16:43,448 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:16:43,448 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:16:43,449 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:16:43,452 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:16:43,452 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:16:43,453 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:16:43,453 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:16:43,453 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:16:43,453 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:16:43,453 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:16:43,453 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:16:43,454 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 -> 0ab550a6e9aa370752671d7ad69781384c889e75 [2018-11-28 18:16:43,501 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:16:43,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:16:43,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:16:43,520 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:16:43,520 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:16:43,521 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/for_bounded_loop1_false-unreach-call_true-termination.i [2018-11-28 18:16:43,572 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c425046/2cc2e7eb14da4277adbeed069ccf1d88/FLAG75170cba1 [2018-11-28 18:16:44,013 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:16:44,016 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/for_bounded_loop1_false-unreach-call_true-termination.i [2018-11-28 18:16:44,023 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c425046/2cc2e7eb14da4277adbeed069ccf1d88/FLAG75170cba1 [2018-11-28 18:16:44,354 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c425046/2cc2e7eb14da4277adbeed069ccf1d88 [2018-11-28 18:16:44,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:16:44,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:16:44,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:16:44,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:16:44,365 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:16:44,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e804404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44, skipping insertion in model container [2018-11-28 18:16:44,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:16:44,394 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:16:44,591 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:16:44,599 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:16:44,623 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:16:44,642 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:16:44,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44 WrapperNode [2018-11-28 18:16:44,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:16:44,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:16:44,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:16:44,645 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:16:44,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:16:44,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:16:44,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:16:44,672 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:16:44,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (1/1) ... [2018-11-28 18:16:44,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:16:44,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:16:44,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:16:44,693 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:16:44,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (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 [2018-11-28 18:16:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:16:44,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:16:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:16:44,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:16:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:16:44,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:16:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-28 18:16:44,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-28 18:16:45,127 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:16:45,130 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-28 18:16:45,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:16:45 BoogieIcfgContainer [2018-11-28 18:16:45,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:16:45,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:16:45,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:16:45,143 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:16:45,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:16:44" (1/3) ... [2018-11-28 18:16:45,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e87eeec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:16:45, skipping insertion in model container [2018-11-28 18:16:45,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:16:44" (2/3) ... [2018-11-28 18:16:45,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e87eeec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:16:45, skipping insertion in model container [2018-11-28 18:16:45,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:16:45" (3/3) ... [2018-11-28 18:16:45,149 INFO L112 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1_false-unreach-call_true-termination.i [2018-11-28 18:16:45,157 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:16:45,166 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:16:45,182 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:16:45,212 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:16:45,212 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:16:45,213 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:16:45,213 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:16:45,213 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:16:45,213 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:16:45,213 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:16:45,213 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:16:45,214 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:16:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-28 18:16:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-28 18:16:45,239 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:16:45,240 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:16:45,243 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:16:45,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:16:45,250 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2018-11-28 18:16:45,252 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:16:45,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:16:45,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:16:45,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:16:45,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:16:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:16:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:16:45,587 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:16:45,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 18:16:45,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:16:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:16:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:16:45,608 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2018-11-28 18:16:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:16:45,940 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2018-11-28 18:16:45,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:16:45,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-11-28 18:16:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:16:45,954 INFO L225 Difference]: With dead ends: 50 [2018-11-28 18:16:45,954 INFO L226 Difference]: Without dead ends: 26 [2018-11-28 18:16:45,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:16:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-28 18:16:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2018-11-28 18:16:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 18:16:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-28 18:16:46,009 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2018-11-28 18:16:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:16:46,011 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-28 18:16:46,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:16:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-28 18:16:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-28 18:16:46,013 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:16:46,013 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:16:46,016 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:16:46,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:16:46,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2018-11-28 18:16:46,017 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:16:46,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:16:46,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:16:46,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:16:46,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:16:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:16:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:16:46,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:16:46,340 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 [2018-11-28 18:16:46,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:16:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:16:46,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:16:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:16:46,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:16:46,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2018-11-28 18:16:46,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 18:16:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 18:16:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:16:46,639 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-11-28 18:16:47,033 WARN L180 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-11-28 18:16:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:16:47,214 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-11-28 18:16:47,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 18:16:47,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2018-11-28 18:16:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:16:47,216 INFO L225 Difference]: With dead ends: 36 [2018-11-28 18:16:47,216 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 18:16:47,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:16:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 18:16:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2018-11-28 18:16:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-28 18:16:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-28 18:16:47,238 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2018-11-28 18:16:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:16:47,239 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-28 18:16:47,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 18:16:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-28 18:16:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 18:16:47,242 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:16:47,242 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:16:47,243 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:16:47,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:16:47,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1415691032, now seen corresponding path program 1 times [2018-11-28 18:16:47,245 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:16:47,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:16:47,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:16:47,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:16:47,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:16:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:16:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:16:47,291 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 18:16:47,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:16:47 BoogieIcfgContainer [2018-11-28 18:16:47,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:16:47,320 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:16:47,321 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:16:47,321 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:16:47,321 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:16:45" (3/4) ... [2018-11-28 18:16:47,324 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 18:16:47,375 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:16:47,376 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:16:47,377 INFO L168 Benchmark]: Toolchain (without parser) took 3018.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 943.3 MB in the beginning and 1.0 GB in the end (delta: -89.9 MB). Peak memory consumption was 50.6 MB. Max. memory is 11.5 GB. [2018-11-28 18:16:47,378 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:16:47,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.02 ms. Allocated memory is still 1.0 GB. Free memory was 943.3 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:16:47,380 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.95 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:16:47,381 INFO L168 Benchmark]: Boogie Preprocessor took 20.70 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:16:47,381 INFO L168 Benchmark]: RCFGBuilder took 438.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -186.4 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2018-11-28 18:16:47,382 INFO L168 Benchmark]: TraceAbstraction took 2187.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.1 MB). Peak memory consumption was 79.1 MB. Max. memory is 11.5 GB. [2018-11-28 18:16:47,383 INFO L168 Benchmark]: Witness Printer took 55.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:16:47,389 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 283.02 ms. Allocated memory is still 1.0 GB. Free memory was 943.3 MB in the beginning and 932.6 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 26.95 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.70 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 438.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -186.4 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2187.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.1 MB). Peak memory consumption was 79.1 MB. Max. memory is 11.5 GB. * Witness Printer took 55.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i