./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/twostage_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS --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 9e65812efd79e833978ab1548160841e061a451f72b6ff490ed9b7c0a593a91c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:39:03,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:39:03,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:39:03,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:39:03,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:39:03,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:39:03,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:39:03,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:39:03,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:39:03,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:39:03,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:39:03,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:39:03,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:39:03,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:39:03,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:39:03,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:39:03,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:39:03,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:39:03,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:39:03,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:39:03,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:39:03,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:39:03,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:39:03,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:39:03,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:39:03,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:39:03,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:39:03,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:39:03,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:39:03,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:39:03,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:39:03,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:39:03,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:39:03,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:39:03,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:39:03,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:39:03,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:39:03,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:39:03,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:39:03,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:39:03,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:39:03,646 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:39:03,688 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:39:03,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:39:03,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:39:03,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:39:03,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:39:03,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:39:03,691 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:39:03,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:39:03,692 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:39:03,692 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:39:03,693 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:39:03,693 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:39:03,694 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:39:03,694 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:39:03,694 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:39:03,694 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:39:03,695 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:39:03,695 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:39:03,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:39:03,696 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:39:03,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:39:03,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:39:03,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:39:03,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:39:03,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:39:03,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:39:03,698 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:39:03,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:39:03,698 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:39:03,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:39:03,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:39:03,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:39:03,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:39:03,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:39:03,700 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:39:03,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:39:03,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:39:03,701 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:39:03,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:39:03,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:39:03,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:39:03,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e65812efd79e833978ab1548160841e061a451f72b6ff490ed9b7c0a593a91c [2022-11-19 07:39:04,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:39:04,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:39:04,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:39:04,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:39:04,041 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:39:04,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/pthread/twostage_3.i [2022-11-19 07:39:04,144 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/data/dbaee7def/efb09499e09445b6bf48614cbcde157b/FLAGb721ee399 [2022-11-19 07:39:04,707 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:39:04,708 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/sv-benchmarks/c/pthread/twostage_3.i [2022-11-19 07:39:04,734 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/data/dbaee7def/efb09499e09445b6bf48614cbcde157b/FLAGb721ee399 [2022-11-19 07:39:04,953 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/data/dbaee7def/efb09499e09445b6bf48614cbcde157b [2022-11-19 07:39:04,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:39:04,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:39:04,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:39:04,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:39:04,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:39:04,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:04" (1/1) ... [2022-11-19 07:39:04,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166313ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:04, skipping insertion in model container [2022-11-19 07:39:04,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:04" (1/1) ... [2022-11-19 07:39:04,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:39:05,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:39:05,682 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/sv-benchmarks/c/pthread/twostage_3.i[58991,59004] [2022-11-19 07:39:05,720 WARN L1568 CHandler]: Possible shadowing of function lock [2022-11-19 07:39:05,722 WARN L1568 CHandler]: Possible shadowing of function lock [2022-11-19 07:39:05,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:39:05,732 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:39:05,788 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/sv-benchmarks/c/pthread/twostage_3.i[58991,59004] [2022-11-19 07:39:05,798 WARN L1568 CHandler]: Possible shadowing of function lock [2022-11-19 07:39:05,799 WARN L1568 CHandler]: Possible shadowing of function lock [2022-11-19 07:39:05,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:39:05,862 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:39:05,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05 WrapperNode [2022-11-19 07:39:05,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:39:05,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:39:05,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:39:05,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:39:05,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,930 INFO L138 Inliner]: procedures = 372, calls = 47, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 157 [2022-11-19 07:39:05,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:39:05,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:39:05,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:39:05,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:39:05,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,965 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:39:05,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:39:05,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:39:05,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:39:05,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (1/1) ... [2022-11-19 07:39:05,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:39:05,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:06,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:39:06,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec1a1f18-f66e-4798-ade8-9bb1b1554ed8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:39:06,045 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2022-11-19 07:39:06,046 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2022-11-19 07:39:06,046 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2022-11-19 07:39:06,046 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2022-11-19 07:39:06,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:39:06,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:39:06,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:39:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:39:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-19 07:39:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:39:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:39:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:39:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:39:06,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:39:06,049 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:39:06,201 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:39:06,202 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:39:06,601 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:39:06,611 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:39:06,611 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 07:39:06,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:06 BoogieIcfgContainer [2022-11-19 07:39:06,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:39:06,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:39:06,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:39:06,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:39:06,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:04" (1/3) ... [2022-11-19 07:39:06,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7bb772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:06, skipping insertion in model container [2022-11-19 07:39:06,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:05" (2/3) ... [2022-11-19 07:39:06,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7bb772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:06, skipping insertion in model container [2022-11-19 07:39:06,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:06" (3/3) ... [2022-11-19 07:39:06,623 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2022-11-19 07:39:06,632 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-19 07:39:06,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:39:06,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:39:06,644 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:39:06,713 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-19 07:39:06,752 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:39:06,766 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 201 transitions, 424 flow [2022-11-19 07:39:06,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 201 transitions, 424 flow [2022-11-19 07:39:06,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 201 transitions, 424 flow [2022-11-19 07:39:06,900 INFO L130 PetriNetUnfolder]: 39/391 cut-off events. [2022-11-19 07:39:06,900 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-19 07:39:06,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 391 events. 39/391 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1405 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2022-11-19 07:39:06,918 INFO L119 LiptonReduction]: Number of co-enabled transitions 5658 [2022-11-19 07:39:26,836 INFO L134 LiptonReduction]: Checked pairs total: 13663 [2022-11-19 07:39:26,836 INFO L136 LiptonReduction]: Total number of compositions: 216 [2022-11-19 07:39:26,844 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 39 transitions, 100 flow [2022-11-19 07:39:26,914 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 643 states, 634 states have (on average 2.5741324921135647) internal successors, (1632), 642 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:39:26,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:39:26,954 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1eadd52c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:39:26,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-19 07:39:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 643 states, 634 states have (on average 2.5741324921135647) internal successors, (1632), 642 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:39:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:39:26,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:26,969 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-19 07:39:26,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-19 07:39:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:26,975 INFO L85 PathProgramCache]: Analyzing trace with hash 779199369, now seen corresponding path program 1 times [2022-11-19 07:39:26,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:26,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660516573] [2022-11-19 07:39:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:26,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:39:27,216 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:39:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:39:27,290 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:39:27,292 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:39:27,293 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-19 07:39:27,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-11-19 07:39:27,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-19 07:39:27,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-19 07:39:27,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:39:27,299 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-19 07:39:27,302 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 07:39:27,302 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-19 07:39:27,351 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-19 07:39:27,366 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:39:27,366 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 241 transitions, 530 flow [2022-11-19 07:39:27,367 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 241 transitions, 530 flow [2022-11-19 07:39:27,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 241 transitions, 530 flow [2022-11-19 07:39:27,624 INFO L130 PetriNetUnfolder]: 155/1192 cut-off events. [2022-11-19 07:39:27,625 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-19 07:39:27,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 1192 events. 155/1192 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6697 event pairs, 2 based on Foata normal form. 0/1044 useless extension candidates. Maximal degree in co-relation 710. Up to 32 conditions per place. [2022-11-19 07:39:27,669 INFO L119 LiptonReduction]: Number of co-enabled transitions 14284 [2022-11-19 07:39:47,625 INFO L134 LiptonReduction]: Checked pairs total: 48107 [2022-11-19 07:39:47,625 INFO L136 LiptonReduction]: Total number of compositions: 240 [2022-11-19 07:39:47,627 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 63 transitions, 174 flow [2022-11-19 07:39:50,850 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 62851 states, 62812 states have (on average 4.42253072661275) internal successors, (277788), 62850 states have internal predecessors, (277788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:39:50,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:39:50,852 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1eadd52c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:39:50,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-19 07:39:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 62851 states, 62812 states have (on average 4.42253072661275) internal successors, (277788), 62850 states have internal predecessors, (277788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:39:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:39:50,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:50,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:50,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting funcBErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-19 07:39:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:50,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1053348496, now seen corresponding path program 1 times [2022-11-19 07:39:50,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:50,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456266047] [2022-11-19 07:39:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:50,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:39:51,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:51,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456266047] [2022-11-19 07:39:51,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456266047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:51,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:39:51,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:39:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433252036] [2022-11-19 07:39:51,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:51,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:39:51,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:39:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:39:51,511 INFO L87 Difference]: Start difference. First operand has 62851 states, 62812 states have (on average 4.42253072661275) internal successors, (277788), 62850 states have internal predecessors, (277788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:39:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:53,736 INFO L93 Difference]: Finished difference Result 84876 states and 342496 transitions. [2022-11-19 07:39:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:39:53,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:39:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:54,920 INFO L225 Difference]: With dead ends: 84876 [2022-11-19 07:39:54,921 INFO L226 Difference]: Without dead ends: 81768 [2022-11-19 07:39:54,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:39:54,926 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:54,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 35 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:39:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81768 states. [2022-11-19 07:39:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81768 to 63168. [2022-11-19 07:39:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63168 states, 63125 states have (on average 4.174162376237624) internal successors, (263494), 63167 states have internal predecessors, (263494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:39:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63168 states to 63168 states and 263494 transitions. [2022-11-19 07:39:58,966 INFO L78 Accepts]: Start accepts. Automaton has 63168 states and 263494 transitions. Word has length 10 [2022-11-19 07:39:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:58,967 INFO L495 AbstractCegarLoop]: Abstraction has 63168 states and 263494 transitions. [2022-11-19 07:39:58,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:39:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 63168 states and 263494 transitions. [2022-11-19 07:39:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:39:58,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:58,969 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:39:58,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:39:58,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-19 07:39:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:58,970 INFO L85 PathProgramCache]: Analyzing trace with hash -477691710, now seen corresponding path program 1 times [2022-11-19 07:39:58,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:58,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409404306] [2022-11-19 07:39:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:58,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:39:59,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:39:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:39:59,266 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:39:59,270 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:39:59,271 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-19 07:39:59,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2022-11-19 07:39:59,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-19 07:39:59,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-19 07:39:59,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-19 07:39:59,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:39:59,273 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-19 07:39:59,274 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 07:39:59,274 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-19 07:39:59,323 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-19 07:39:59,326 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:39:59,327 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 281 transitions, 640 flow [2022-11-19 07:39:59,327 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 281 transitions, 640 flow [2022-11-19 07:39:59,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 281 transitions, 640 flow [2022-11-19 07:40:00,684 INFO L130 PetriNetUnfolder]: 653/3897 cut-off events. [2022-11-19 07:40:00,684 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-19 07:40:00,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4348 conditions, 3897 events. 653/3897 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 29064 event pairs, 64 based on Foata normal form. 0/3420 useless extension candidates. Maximal degree in co-relation 2314. Up to 192 conditions per place. [2022-11-19 07:40:00,837 INFO L119 LiptonReduction]: Number of co-enabled transitions 25878 [2022-11-19 07:40:22,365 INFO L134 LiptonReduction]: Checked pairs total: 94287 [2022-11-19 07:40:22,366 INFO L136 LiptonReduction]: Total number of compositions: 266 [2022-11-19 07:40:22,367 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 80 places, 84 transitions, 246 flow