./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/mutex_lock_int.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/mutex_lock_int.i -s /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c976dd79cabe443ac09b5b35c5674998e922b27b .............................................................................................................................................................................................................................................................................. 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-cad4683 [2019-10-22 11:24:20,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:24:20,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:24:20,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:24:20,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:24:20,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:24:20,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:24:20,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:24:20,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:24:20,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:24:20,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:24:20,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:24:20,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:24:20,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:24:20,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:24:20,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:24:20,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:24:20,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:24:20,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:24:20,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:24:20,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:24:20,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:24:20,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:24:20,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:24:20,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:24:20,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:24:20,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:24:20,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:24:20,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:24:20,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:24:20,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:24:20,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:24:20,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:24:20,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:24:20,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:24:20,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:24:20,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:24:20,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:24:20,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:24:20,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:24:20,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:24:20,827 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:24:20,848 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:24:20,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:24:20,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:24:20,849 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:24:20,849 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:24:20,849 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:24:20,849 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:24:20,849 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:24:20,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:24:20,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:24:20,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:24:20,850 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:24:20,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:24:20,852 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:24:20,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:24:20,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:24:20,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:24:20,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:24:20,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:24:20,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:24:20,853 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:24:20,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:24:20,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:24:20,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:24:20,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:24:20,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:24:20,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:24:20,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:20,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:24:20,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:24:20,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:24:20,855 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:24:20,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:24:20,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:24:20,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:24:20,855 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan 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 -> Taipan 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 -> c976dd79cabe443ac09b5b35c5674998e922b27b [2019-10-22 11:24:20,886 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:24:20,900 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:24:20,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:24:20,904 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:24:20,904 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:24:20,905 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/../../sv-benchmarks/c/ldv-regression/mutex_lock_int.i [2019-10-22 11:24:20,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/data/c21ef0b0a/cb377025c3de4f11b483bcd000944d4a/FLAGcb7f93a6c [2019-10-22 11:24:21,351 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:24:21,352 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/sv-benchmarks/c/ldv-regression/mutex_lock_int.i [2019-10-22 11:24:21,357 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/data/c21ef0b0a/cb377025c3de4f11b483bcd000944d4a/FLAGcb7f93a6c [2019-10-22 11:24:21,755 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/data/c21ef0b0a/cb377025c3de4f11b483bcd000944d4a [2019-10-22 11:24:21,757 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:24:21,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:24:21,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:21,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:24:21,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:24:21,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:21" (1/1) ... [2019-10-22 11:24:21,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456b6263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:21, skipping insertion in model container [2019-10-22 11:24:21,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:21" (1/1) ... [2019-10-22 11:24:21,780 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:24:21,795 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:24:21,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:21,920 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:24:21,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:22,004 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:24:22,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22 WrapperNode [2019-10-22 11:24:22,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:22,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:22,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:24:22,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:24:22,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... [2019-10-22 11:24:22,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... [2019-10-22 11:24:22,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:22,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:24:22,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:24:22,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:24:22,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... [2019-10-22 11:24:22,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... [2019-10-22 11:24:22,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... [2019-10-22 11:24:22,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... [2019-10-22 11:24:22,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... [2019-10-22 11:24:22,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... [2019-10-22 11:24:22,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... [2019-10-22 11:24:22,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:24:22,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:24:22,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:24:22,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:24:22,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/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 [2019-10-22 11:24:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:24:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:24:22,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:24:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:24:22,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:24:22,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:24:22,260 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:24:22,261 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-22 11:24:22,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:22 BoogieIcfgContainer [2019-10-22 11:24:22,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:24:22,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:24:22,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:24:22,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:24:22,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:24:21" (1/3) ... [2019-10-22 11:24:22,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222a9649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:22, skipping insertion in model container [2019-10-22 11:24:22,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:22" (2/3) ... [2019-10-22 11:24:22,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222a9649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:22, skipping insertion in model container [2019-10-22 11:24:22,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:22" (3/3) ... [2019-10-22 11:24:22,280 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2019-10-22 11:24:22,295 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:24:22,302 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-10-22 11:24:22,313 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-10-22 11:24:22,342 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:24:22,342 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:24:22,343 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:24:22,343 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:24:22,343 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:24:22,343 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:24:22,343 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:24:22,343 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:24:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 11:24:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:24:22,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:22,360 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:24:22,362 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:22,370 INFO L82 PathProgramCache]: Analyzing trace with hash 925605, now seen corresponding path program 1 times [2019-10-22 11:24:22,378 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:22,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142803203] [2019-10-22 11:24:22,379 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:22,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:22,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:22,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142803203] [2019-10-22 11:24:22,494 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:24:22,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:24:22,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651893365] [2019-10-22 11:24:22,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:24:22,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:24:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:24:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:24:22,508 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-10-22 11:24:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:22,532 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-10-22 11:24:22,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:24:22,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 11:24:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:22,539 INFO L225 Difference]: With dead ends: 25 [2019-10-22 11:24:22,539 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 11:24:22,541 INFO L600 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 [2019-10-22 11:24:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 11:24:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 11:24:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 11:24:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2019-10-22 11:24:22,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 4 [2019-10-22 11:24:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:22,563 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2019-10-22 11:24:22,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:24:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2019-10-22 11:24:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 11:24:22,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:22,564 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:22,564 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:22,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1810629644, now seen corresponding path program 1 times [2019-10-22 11:24:22,565 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:22,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30462021] [2019-10-22 11:24:22,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:22,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:22,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:24:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:24:22,611 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:24:22,611 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:24:22,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:24:22 BoogieIcfgContainer [2019-10-22 11:24:22,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:24:22,633 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:24:22,633 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:24:22,633 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:24:22,634 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:22" (3/4) ... [2019-10-22 11:24:22,636 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:24:22,667 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f3736b1d-c9c7-4719-b4f3-661dffd859a5/bin/utaipan/witness.graphml [2019-10-22 11:24:22,667 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:24:22,669 INFO L168 Benchmark]: Toolchain (without parser) took 910.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -127.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:22,669 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:22,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -175.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:22,670 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.95 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. [2019-10-22 11:24:22,671 INFO L168 Benchmark]: Boogie Preprocessor took 12.69 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. [2019-10-22 11:24:22,671 INFO L168 Benchmark]: RCFGBuilder took 212.18 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:22,672 INFO L168 Benchmark]: TraceAbstraction took 365.77 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:22,672 INFO L168 Benchmark]: Witness Printer took 34.19 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. [2019-10-22 11:24:22,675 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 242.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -175.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.95 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 12.69 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 212.18 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 365.77 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * Witness Printer took 34.19 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L30] int m; [L31] m = 0 [L18] EXPR \read(*a) [L18] COND FALSE !(*a == 1) [L19] *a = 1 [L18] EXPR \read(*a) [L18] COND TRUE *a == 1 [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 7 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...