./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b60d0a2361544de13d982747fad9d912bc87905e .............................................................................................................................................................................................................................................................................................. 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 0.2.0-a4ecdab [2020-11-22 13:00:52,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:00:52,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:00:52,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:00:52,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:00:52,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:00:52,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:00:52,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:00:52,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:00:52,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:00:52,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:00:52,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:00:52,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:00:52,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:00:52,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:00:52,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:00:52,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:00:52,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:00:52,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:00:52,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:00:52,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:00:52,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:00:52,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:00:52,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:00:52,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:00:52,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:00:52,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:00:52,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:00:52,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:00:52,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:00:52,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:00:52,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:00:52,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:00:52,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:00:52,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:00:52,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:00:52,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:00:52,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:00:52,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:00:52,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:00:52,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:00:52,781 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:00:52,824 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:00:52,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:00:52,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:00:52,826 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:00:52,826 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:00:52,826 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:00:52,826 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:00:52,827 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:00:52,827 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:00:52,827 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:00:52,828 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:00:52,828 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:00:52,829 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:00:52,829 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:00:52,829 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:00:52,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:00:52,830 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:00:52,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:00:52,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:00:52,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:00:52,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:00:52,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:00:52,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:00:52,832 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:00:52,832 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:00:52,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:00:52,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:00:52,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:00:52,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:00:52,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:00:52,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:00:52,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:00:52,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:00:52,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:00:52,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:00:52,836 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:00:52,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:00:52,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:00:52,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:00:52,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:00:52,837 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60d0a2361544de13d982747fad9d912bc87905e [2020-11-22 13:00:53,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:00:53,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:00:53,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:00:53,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:00:53,151 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:00:53,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-1.c [2020-11-22 13:00:53,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/data/fae43e07b/f3859b21fc1e43f789d2dfd8788b8fa4/FLAG3cfcef350 [2020-11-22 13:00:53,669 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:00:53,670 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/sv-benchmarks/c/systemc/pc_sfifo_1.cil-1.c [2020-11-22 13:00:53,677 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/data/fae43e07b/f3859b21fc1e43f789d2dfd8788b8fa4/FLAG3cfcef350 [2020-11-22 13:00:54,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/data/fae43e07b/f3859b21fc1e43f789d2dfd8788b8fa4 [2020-11-22 13:00:54,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:00:54,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:00:54,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:00:54,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:00:54,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:00:54,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d775a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54, skipping insertion in model container [2020-11-22 13:00:54,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:00:54,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:00:54,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:00:54,328 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:00:54,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:00:54,375 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:00:54,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54 WrapperNode [2020-11-22 13:00:54,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:00:54,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:00:54,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:00:54,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:00:54,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:00:54,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:00:54,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:00:54,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:00:54,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... [2020-11-22 13:00:54,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:00:54,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:00:54,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:00:54,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:00:54,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/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 [2020-11-22 13:00:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:00:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:00:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:00:54,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:00:55,436 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:00:55,436 INFO L298 CfgBuilder]: Removed 50 assume(true) statements. [2020-11-22 13:00:55,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:00:55 BoogieIcfgContainer [2020-11-22 13:00:55,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:00:55,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:00:55,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:00:55,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:00:55,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:00:54" (1/3) ... [2020-11-22 13:00:55,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176c8f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:00:55, skipping insertion in model container [2020-11-22 13:00:55,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:00:54" (2/3) ... [2020-11-22 13:00:55,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176c8f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:00:55, skipping insertion in model container [2020-11-22 13:00:55,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:00:55" (3/3) ... [2020-11-22 13:00:55,447 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-1.c [2020-11-22 13:00:55,459 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:00:55,463 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-22 13:00:55,475 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-22 13:00:55,497 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:00:55,497 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:00:55,498 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:00:55,498 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:00:55,498 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:00:55,498 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:00:55,498 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:00:55,499 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:00:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-11-22 13:00:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:00:55,524 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:00:55,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:00:55,526 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:00:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:00:55,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1548015816, now seen corresponding path program 1 times [2020-11-22 13:00:55,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:00:55,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040108171] [2020-11-22 13:00:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:00:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:00:55,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:00:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:00:55,739 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:00:55,774 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:00:55,775 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:00:55,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:00:55,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:00:55 BoogieIcfgContainer [2020-11-22 13:00:55,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:00:55,834 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:00:55,834 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:00:55,834 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:00:55,835 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:00:55" (3/4) ... [2020-11-22 13:00:55,837 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:00:55,931 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b2fa12a5-adbb-432d-a6b9-42b5bd722cd5/bin/utaipan/witness.graphml [2020-11-22 13:00:55,931 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:00:55,933 INFO L168 Benchmark]: Toolchain (without parser) took 1876.17 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 70.7 MB in the beginning and 78.3 MB in the end (delta: -7.6 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:00:55,934 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory was 78.4 MB in the beginning and 78.4 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:00:55,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.76 ms. Allocated memory is still 107.0 MB. Free memory was 70.4 MB in the beginning and 80.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:00:55,936 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.22 ms. Allocated memory is still 107.0 MB. Free memory was 80.0 MB in the beginning and 77.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:00:55,937 INFO L168 Benchmark]: Boogie Preprocessor took 31.10 ms. Allocated memory is still 107.0 MB. Free memory was 77.9 MB in the beginning and 76.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:00:55,937 INFO L168 Benchmark]: RCFGBuilder took 983.13 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 76.4 MB in the beginning and 95.0 MB in the end (delta: -18.7 MB). Peak memory consumption was 45.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:00:55,938 INFO L168 Benchmark]: TraceAbstraction took 392.34 ms. Allocated memory is still 130.0 MB. Free memory was 95.0 MB in the beginning and 81.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:00:55,938 INFO L168 Benchmark]: Witness Printer took 98.04 ms. Allocated memory is still 130.0 MB. Free memory was 81.2 MB in the beginning and 78.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:00:55,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory was 78.4 MB in the beginning and 78.4 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.76 ms. Allocated memory is still 107.0 MB. Free memory was 70.4 MB in the beginning and 80.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.22 ms. Allocated memory is still 107.0 MB. Free memory was 80.0 MB in the beginning and 77.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.10 ms. Allocated memory is still 107.0 MB. Free memory was 77.9 MB in the beginning and 76.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 983.13 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 76.4 MB in the beginning and 95.0 MB in the end (delta: -18.7 MB). Peak memory consumption was 45.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 392.34 ms. Allocated memory is still 130.0 MB. Free memory was 95.0 MB in the beginning and 81.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 98.04 ms. Allocated memory is still 130.0 MB. Free memory was 81.2 MB in the beginning and 78.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] int q_buf_0 ; [L17] int q_free ; [L18] int q_read_ev ; [L19] int q_write_ev ; [L20] int p_num_write ; [L21] int p_last_write ; [L22] int p_dw_st ; [L23] int p_dw_pc ; [L24] int p_dw_i ; [L25] int c_num_read ; [L26] int c_last_read ; [L27] int c_dr_st ; [L28] int c_dr_pc ; [L29] int c_dr_i ; [L136] static int a_t ; [L352] int __retres1 ; [L338] q_free = 1 [L339] q_write_ev = 2 [L340] q_read_ev = q_write_ev [L341] p_num_write = 0 [L342] p_dw_pc = 0 [L343] p_dw_i = 1 [L344] c_num_read = 0 [L345] c_dr_pc = 0 [L346] c_dr_i = 1 [L306] int kernel_st ; [L307] int tmp ; [L311] kernel_st = 0 [L198] COND TRUE (int )p_dw_i == 1 [L199] p_dw_st = 0 [L203] COND TRUE (int )c_dr_i == 1 [L204] c_dr_st = 0 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=1, q_read_ev=2, q_write_ev=2] [L315] COND TRUE 1 [L318] kernel_st = 1 [L233] int tmp ; [L234] int tmp___0 ; [L235] int tmp___1 ; VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=1, q_read_ev=2, q_write_ev=2] [L239] COND TRUE 1 [L213] int __retres1 ; [L216] COND TRUE (int )p_dw_st == 0 [L217] __retres1 = 1 [L229] return (__retres1); [L242] tmp___1 = exists_runnable_thread() [L244] COND TRUE \read(tmp___1) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=1, q_read_ev=2, q_write_ev=2] [L249] COND TRUE (int )p_dw_st == 0 [L251] tmp = __VERIFIER_nondet_int() [L253] COND FALSE !(\read(tmp)) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=1, q_read_ev=2, q_write_ev=2] [L3] __assert_fail("0", "pc_sfifo_1.cil-1.c", 3, "reach_error") VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_free=1, q_read_ev=2, q_write_ev=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...