./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/list-properties/list_flag_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0ed9222f 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/list-properties/list_flag_false-unreach-call_false-valid-memcleanup.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 6f9ac6d0b4f176160999f5c2051c2fd2150d4bff ............................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-0ed9222-m [2019-01-12 09:19:36,661 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-12 09:19:36,665 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-12 09:19:36,684 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-12 09:19:36,685 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-12 09:19:36,686 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-12 09:19:36,688 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-12 09:19:36,690 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-12 09:19:36,692 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-12 09:19:36,694 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-12 09:19:36,696 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-12 09:19:36,697 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-12 09:19:36,698 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-12 09:19:36,699 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-12 09:19:36,700 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-12 09:19:36,701 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-12 09:19:36,702 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-12 09:19:36,703 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-12 09:19:36,705 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-12 09:19:36,707 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-12 09:19:36,708 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-12 09:19:36,709 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-12 09:19:36,712 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-12 09:19:36,712 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-12 09:19:36,712 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-12 09:19:36,713 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-12 09:19:36,714 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-12 09:19:36,715 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-12 09:19:36,716 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-12 09:19:36,717 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-12 09:19:36,717 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-12 09:19:36,718 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-12 09:19:36,718 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-12 09:19:36,718 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-12 09:19:36,719 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-12 09:19:36,720 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-12 09:19:36,720 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-12 09:19:36,743 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-12 09:19:36,743 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-12 09:19:36,744 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-12 09:19:36,744 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-12 09:19:36,745 INFO L133 SettingsManager]: * Use SBE=true [2019-01-12 09:19:36,745 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-12 09:19:36,746 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-12 09:19:36,746 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-12 09:19:36,746 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-12 09:19:36,746 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-12 09:19:36,746 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-12 09:19:36,746 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-12 09:19:36,747 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-12 09:19:36,747 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-12 09:19:36,747 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-12 09:19:36,747 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-12 09:19:36,747 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-12 09:19:36,748 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-12 09:19:36,749 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-12 09:19:36,749 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-12 09:19:36,749 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-12 09:19:36,750 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-12 09:19:36,750 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-12 09:19:36,750 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-12 09:19:36,750 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-12 09:19:36,751 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-12 09:19:36,751 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-12 09:19:36,751 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-12 09:19:36,751 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 -> 6f9ac6d0b4f176160999f5c2051c2fd2150d4bff [2019-01-12 09:19:36,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-12 09:19:36,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-12 09:19:36,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-12 09:19:36,839 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-12 09:19:36,839 INFO L276 PluginConnector]: CDTParser initialized [2019-01-12 09:19:36,840 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/list-properties/list_flag_false-unreach-call_false-valid-memcleanup.i [2019-01-12 09:19:36,886 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/630f57d14/75321c89ad01426c847d7694258373d3/FLAG45af75709 [2019-01-12 09:19:37,388 INFO L307 CDTParser]: Found 1 translation units. [2019-01-12 09:19:37,389 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/list-properties/list_flag_false-unreach-call_false-valid-memcleanup.i [2019-01-12 09:19:37,405 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/630f57d14/75321c89ad01426c847d7694258373d3/FLAG45af75709 [2019-01-12 09:19:37,676 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/630f57d14/75321c89ad01426c847d7694258373d3 [2019-01-12 09:19:37,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-12 09:19:37,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-12 09:19:37,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-12 09:19:37,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-12 09:19:37,687 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-12 09:19:37,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 09:19:37" (1/1) ... [2019-01-12 09:19:37,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d754c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:37, skipping insertion in model container [2019-01-12 09:19:37,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 09:19:37" (1/1) ... [2019-01-12 09:19:37,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-12 09:19:37,758 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-12 09:19:38,154 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 09:19:38,169 INFO L191 MainTranslator]: Completed pre-run [2019-01-12 09:19:38,309 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 09:19:38,362 INFO L195 MainTranslator]: Completed translation [2019-01-12 09:19:38,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38 WrapperNode [2019-01-12 09:19:38,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-12 09:19:38,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-12 09:19:38,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-12 09:19:38,364 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-12 09:19:38,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (1/1) ... [2019-01-12 09:19:38,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (1/1) ... [2019-01-12 09:19:38,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-12 09:19:38,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-12 09:19:38,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-12 09:19:38,420 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-12 09:19:38,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (1/1) ... [2019-01-12 09:19:38,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (1/1) ... [2019-01-12 09:19:38,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (1/1) ... [2019-01-12 09:19:38,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (1/1) ... [2019-01-12 09:19:38,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (1/1) ... [2019-01-12 09:19:38,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (1/1) ... [2019-01-12 09:19:38,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (1/1) ... [2019-01-12 09:19:38,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-12 09:19:38,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-12 09:19:38,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-12 09:19:38,461 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-12 09:19:38,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (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 [2019-01-12 09:19:38,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-01-12 09:19:38,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-01-12 09:19:38,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-01-12 09:19:38,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-01-12 09:19:38,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-01-12 09:19:38,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-12 09:19:38,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-12 09:19:38,978 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-12 09:19:38,979 INFO L286 CfgBuilder]: Removed 11 assue(true) statements. [2019-01-12 09:19:38,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 09:19:38 BoogieIcfgContainer [2019-01-12 09:19:38,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-12 09:19:38,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-12 09:19:38,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-12 09:19:38,984 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-12 09:19:38,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.01 09:19:37" (1/3) ... [2019-01-12 09:19:38,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf5bab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 09:19:38, skipping insertion in model container [2019-01-12 09:19:38,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:38" (2/3) ... [2019-01-12 09:19:38,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf5bab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 09:19:38, skipping insertion in model container [2019-01-12 09:19:38,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 09:19:38" (3/3) ... [2019-01-12 09:19:38,988 INFO L112 eAbstractionObserver]: Analyzing ICFG list_flag_false-unreach-call_false-valid-memcleanup.i [2019-01-12 09:19:38,998 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-12 09:19:39,006 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-12 09:19:39,023 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-12 09:19:39,052 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-12 09:19:39,052 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-12 09:19:39,052 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-12 09:19:39,052 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-12 09:19:39,053 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-12 09:19:39,053 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-12 09:19:39,053 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-12 09:19:39,053 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-12 09:19:39,053 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-12 09:19:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-01-12 09:19:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-01-12 09:19:39,074 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:19:39,075 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:19:39,078 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:19:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:19:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1941242346, now seen corresponding path program 1 times [2019-01-12 09:19:39,086 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:19:39,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:19:39,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:39,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:19:39,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:19:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 09:19:39,210 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:19:39,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-12 09:19:39,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-12 09:19:39,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-12 09:19:39,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-12 09:19:39,228 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-01-12 09:19:39,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:19:39,242 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2019-01-12 09:19:39,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-12 09:19:39,243 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-01-12 09:19:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:19:39,251 INFO L225 Difference]: With dead ends: 38 [2019-01-12 09:19:39,251 INFO L226 Difference]: Without dead ends: 20 [2019-01-12 09:19:39,254 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 [2019-01-12 09:19:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-01-12 09:19:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-01-12 09:19:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-12 09:19:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-01-12 09:19:39,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2019-01-12 09:19:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:19:39,286 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-01-12 09:19:39,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-12 09:19:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-01-12 09:19:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-01-12 09:19:39,287 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:19:39,287 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:19:39,288 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:19:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:19:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1795403316, now seen corresponding path program 1 times [2019-01-12 09:19:39,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:19:39,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:19:39,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:39,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:19:39,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:19:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 09:19:39,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:19:39,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-01-12 09:19:39,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-12 09:19:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-12 09:19:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-01-12 09:19:39,463 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2019-01-12 09:19:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:19:39,859 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-01-12 09:19:39,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-12 09:19:39,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-01-12 09:19:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:19:39,861 INFO L225 Difference]: With dead ends: 44 [2019-01-12 09:19:39,861 INFO L226 Difference]: Without dead ends: 40 [2019-01-12 09:19:39,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-01-12 09:19:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-01-12 09:19:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-01-12 09:19:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-01-12 09:19:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-01-12 09:19:39,870 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2019-01-12 09:19:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:19:39,870 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-01-12 09:19:39,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-12 09:19:39,871 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-01-12 09:19:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-01-12 09:19:39,871 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:19:39,873 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:19:39,873 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:19:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:19:39,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1242942375, now seen corresponding path program 1 times [2019-01-12 09:19:39,874 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:19:39,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:19:39,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:39,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:19:39,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:19:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 09:19:40,019 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:19:40,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-01-12 09:19:40,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-12 09:19:40,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-12 09:19:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-01-12 09:19:40,020 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2019-01-12 09:19:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:19:40,293 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-01-12 09:19:40,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-12 09:19:40,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-01-12 09:19:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:19:40,295 INFO L225 Difference]: With dead ends: 46 [2019-01-12 09:19:40,296 INFO L226 Difference]: Without dead ends: 38 [2019-01-12 09:19:40,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-01-12 09:19:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-01-12 09:19:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-01-12 09:19:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-12 09:19:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-01-12 09:19:40,302 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2019-01-12 09:19:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:19:40,303 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-01-12 09:19:40,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-12 09:19:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-01-12 09:19:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-01-12 09:19:40,304 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:19:40,304 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:19:40,304 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:19:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:19:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -799146, now seen corresponding path program 1 times [2019-01-12 09:19:40,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:19:40,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:19:40,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:40,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:19:40,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:19:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 09:19:40,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:19:40,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-01-12 09:19:40,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-12 09:19:40,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-12 09:19:40,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-01-12 09:19:40,420 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2019-01-12 09:19:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:19:40,552 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-01-12 09:19:40,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-12 09:19:40,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-01-12 09:19:40,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:19:40,555 INFO L225 Difference]: With dead ends: 44 [2019-01-12 09:19:40,555 INFO L226 Difference]: Without dead ends: 34 [2019-01-12 09:19:40,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-01-12 09:19:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-01-12 09:19:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2019-01-12 09:19:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-01-12 09:19:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-01-12 09:19:40,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2019-01-12 09:19:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:19:40,560 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-01-12 09:19:40,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-12 09:19:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-01-12 09:19:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-01-12 09:19:40,562 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:19:40,562 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:19:40,563 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:19:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:19:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash -172690303, now seen corresponding path program 1 times [2019-01-12 09:19:40,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:19:40,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:19:40,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:40,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:19:40,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:19:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 09:19:40,611 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:19:40,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-01-12 09:19:40,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-12 09:19:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-12 09:19:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-12 09:19:40,613 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-01-12 09:19:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:19:40,640 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-01-12 09:19:40,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-12 09:19:40,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-01-12 09:19:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:19:40,644 INFO L225 Difference]: With dead ends: 50 [2019-01-12 09:19:40,644 INFO L226 Difference]: Without dead ends: 34 [2019-01-12 09:19:40,645 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 [2019-01-12 09:19:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-01-12 09:19:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-01-12 09:19:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-12 09:19:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-01-12 09:19:40,650 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2019-01-12 09:19:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:19:40,650 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-01-12 09:19:40,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-12 09:19:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-01-12 09:19:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-01-12 09:19:40,651 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:19:40,651 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:19:40,651 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:19:40,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:19:40,653 INFO L82 PathProgramCache]: Analyzing trace with hash -616427248, now seen corresponding path program 1 times [2019-01-12 09:19:40,653 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:19:40,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:19:40,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:40,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:19:40,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 09:19:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 09:19:40,730 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-12 09:19:40,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.01 09:19:40 BoogieIcfgContainer [2019-01-12 09:19:40,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-12 09:19:40,764 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-12 09:19:40,764 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-12 09:19:40,765 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-12 09:19:40,765 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 09:19:38" (3/4) ... [2019-01-12 09:19:40,767 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-12 09:19:40,823 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-12 09:19:40,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-12 09:19:40,825 INFO L168 Benchmark]: Toolchain (without parser) took 3143.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 948.7 MB in the beginning and 1.0 GB in the end (delta: -68.8 MB). Peak memory consumption was 77.5 MB. Max. memory is 11.5 GB. [2019-01-12 09:19:40,826 INFO L168 Benchmark]: CDTParser took 0.18 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. [2019-01-12 09:19:40,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 680.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 943.3 MB in the beginning and 1.1 GB in the end (delta: -178.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2019-01-12 09:19:40,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.37 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 09:19:40,829 INFO L168 Benchmark]: Boogie Preprocessor took 40.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 09:19:40,830 INFO L168 Benchmark]: RCFGBuilder took 519.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-01-12 09:19:40,830 INFO L168 Benchmark]: TraceAbstraction took 1782.61 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: 79.6 MB). Peak memory consumption was 79.6 MB. Max. memory is 11.5 GB. [2019-01-12 09:19:40,831 INFO L168 Benchmark]: Witness Printer took 59.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 09:19:40,836 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 680.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 943.3 MB in the beginning and 1.1 GB in the end (delta: -178.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 56.37 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 40.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 519.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1782.61 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: 79.6 MB). Peak memory consumption was 79.6 MB. Max. memory is 11.5 GB. * Witness Printer took 59.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 652]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] int flag = __VERIFIER_nondet_int(); [L628] List p, a, t; [L629] a = (List) malloc(sizeof(struct node)) [L630] COND FALSE !(a == 0) [L631] p = a [L632] COND TRUE __VERIFIER_nondet_int() [L633] COND TRUE \read(flag) [L634] p->h = 1 [L638] t = (List) malloc(sizeof(struct node)) [L639] COND FALSE !(t == 0) [L640] p->n = t [L641] EXPR p->n [L641] p = p->n [L632] COND FALSE !(__VERIFIER_nondet_int()) [L643] p->h = 3 [L644] p = a [L645] COND TRUE \read(flag) [L646] EXPR p->h [L646] COND FALSE !(p->h == 2) [L651] EXPR p->h [L651] COND TRUE p->h != 3 [L652] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. UNSAFE Result, 1.7s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 107 SDtfs, 71 SDslu, 136 SDs, 0 SdLazy, 135 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 2762 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...