./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/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_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/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_0402fa51-8cbc-416c-882f-2d3e1a945138/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 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 --- 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 08:19:02,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:19:02,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:19:02,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:19:02,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:19:02,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:19:02,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:19:02,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:19:02,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:19:02,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:19:02,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:19:02,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:19:02,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:19:02,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:19:02,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:19:02,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:19:02,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:19:02,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:19:02,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:19:02,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:19:02,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:19:02,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:19:02,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:19:02,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:19:02,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:19:02,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:19:02,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:19:02,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:19:02,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:19:02,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:19:02,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:19:02,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:19:02,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:19:02,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:19:02,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:19:02,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:19:02,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:19:02,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:19:02,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:19:02,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:19:02,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:19:02,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:19:02,813 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:19:02,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:19:02,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:19:02,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:19:02,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:19:02,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:19:02,816 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:19:02,817 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:19:02,817 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:19:02,817 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:19:02,818 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:19:02,819 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:19:02,819 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:19:02,819 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:19:02,819 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:19:02,820 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:19:02,820 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:19:02,820 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:19:02,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:19:02,821 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:19:02,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:19:02,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:19:02,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:19:02,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:19:02,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:19:02,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:19:02,824 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:19:02,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:19:02,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:19:02,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:19:02,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:19:02,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:19:02,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:19:02,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:19:02,827 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:19:02,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:19:02,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:19:02,827 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:19:02,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:19:02,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:19:02,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:19:02,829 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_0402fa51-8cbc-416c-882f-2d3e1a945138/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 [2022-11-19 08:19:03,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:19:03,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:19:03,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:19:03,236 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:19:03,237 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:19:03,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-11-19 08:19:03,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/data/5859d0945/a8bac7e6c11a42498687cae3a8655b6b/FLAGa6c13464a [2022-11-19 08:19:04,000 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:19:04,000 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-11-19 08:19:04,010 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/data/5859d0945/a8bac7e6c11a42498687cae3a8655b6b/FLAGa6c13464a [2022-11-19 08:19:04,326 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/data/5859d0945/a8bac7e6c11a42498687cae3a8655b6b [2022-11-19 08:19:04,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:19:04,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:19:04,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:19:04,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:19:04,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:19:04,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e799e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04, skipping insertion in model container [2022-11-19 08:19:04,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:19:04,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:19:04,676 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_0402fa51-8cbc-416c-882f-2d3e1a945138/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-11-19 08:19:04,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:19:04,693 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:19:04,739 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_0402fa51-8cbc-416c-882f-2d3e1a945138/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-11-19 08:19:04,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:19:04,758 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:19:04,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04 WrapperNode [2022-11-19 08:19:04,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:19:04,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:19:04,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:19:04,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:19:04,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,831 INFO L138 Inliner]: procedures = 23, calls = 176, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 392 [2022-11-19 08:19:04,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:19:04,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:19:04,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:19:04,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:19:04,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,882 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:19:04,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:19:04,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:19:04,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:19:04,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (1/1) ... [2022-11-19 08:19:04,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:19:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:04,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:19:04,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0402fa51-8cbc-416c-882f-2d3e1a945138/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:19:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:19:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 08:19:04,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 08:19:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 08:19:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 08:19:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 08:19:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 08:19:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-19 08:19:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-19 08:19:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:19:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:19:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:19:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 08:19:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 08:19:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:19:04,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:19:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:19:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:19:04,985 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 08:19:05,111 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:19:05,113 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:19:05,766 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:19:06,033 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:19:06,034 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:19:06,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:19:06 BoogieIcfgContainer [2022-11-19 08:19:06,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:19:06,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:19:06,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:19:06,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:19:06,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:19:04" (1/3) ... [2022-11-19 08:19:06,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efc708d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:19:06, skipping insertion in model container [2022-11-19 08:19:06,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:19:04" (2/3) ... [2022-11-19 08:19:06,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efc708d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:19:06, skipping insertion in model container [2022-11-19 08:19:06,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:19:06" (3/3) ... [2022-11-19 08:19:06,052 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2022-11-19 08:19:06,061 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-19 08:19:06,074 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:19:06,075 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:19:06,075 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 08:19:06,217 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-19 08:19:06,282 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 08:19:06,296 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 202 transitions, 436 flow [2022-11-19 08:19:06,299 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 202 transitions, 436 flow [2022-11-19 08:19:06,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 202 transitions, 436 flow [2022-11-19 08:19:06,467 INFO L130 PetriNetUnfolder]: 2/198 cut-off events. [2022-11-19 08:19:06,467 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-19 08:19:06,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 198 events. 2/198 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 204 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2022-11-19 08:19:06,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 5712 [2022-11-19 08:19:16,115 INFO L134 LiptonReduction]: Checked pairs total: 48305 [2022-11-19 08:19:16,115 INFO L136 LiptonReduction]: Total number of compositions: 136 [2022-11-19 08:19:16,131 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 74 transitions, 180 flow [2022-11-19 08:19:20,662 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 88652 states, 88651 states have (on average 4.1476802292134325) internal successors, (367696), 88651 states have internal predecessors, (367696), 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 08:19:20,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:19:20,964 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;@687a11f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:19:20,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-19 08:19:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 88652 states, 88651 states have (on average 4.1476802292134325) internal successors, (367696), 88651 states have internal predecessors, (367696), 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 08:19:22,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:19:22,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:22,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:22,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-19 08:19:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1732513769, now seen corresponding path program 1 times [2022-11-19 08:19:22,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:22,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548092420] [2022-11-19 08:19:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:22,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:25,616 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 08:19:25,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548092420] [2022-11-19 08:19:25,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548092420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:25,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:19:25,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-19 08:19:25,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014056200] [2022-11-19 08:19:25,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:25,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:19:25,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:19:25,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:19:25,871 INFO L87 Difference]: Start difference. First operand has 88652 states, 88651 states have (on average 4.1476802292134325) internal successors, (367696), 88651 states have internal predecessors, (367696), 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 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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 08:19:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:29,844 INFO L93 Difference]: Finished difference Result 109605 states and 439217 transitions. [2022-11-19 08:19:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:19:29,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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 69 [2022-11-19 08:19:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:31,409 INFO L225 Difference]: With dead ends: 109605 [2022-11-19 08:19:31,410 INFO L226 Difference]: Without dead ends: 109256 [2022-11-19 08:19:31,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:19:31,418 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 474 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:31,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 306 Invalid, 2286 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 08:19:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109256 states. [2022-11-19 08:19:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109256 to 90962. [2022-11-19 08:19:37,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90962 states, 90961 states have (on average 4.1337716164070315) internal successors, (376012), 90961 states have internal predecessors, (376012), 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 08:19:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90962 states to 90962 states and 376012 transitions. [2022-11-19 08:19:39,095 INFO L78 Accepts]: Start accepts. Automaton has 90962 states and 376012 transitions. Word has length 69 [2022-11-19 08:19:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:39,097 INFO L495 AbstractCegarLoop]: Abstraction has 90962 states and 376012 transitions. [2022-11-19 08:19:39,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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 08:19:39,104 INFO L276 IsEmpty]: Start isEmpty. Operand 90962 states and 376012 transitions. [2022-11-19 08:19:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:19:39,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:39,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:39,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:19:39,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-19 08:19:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1941448827, now seen corresponding path program 2 times [2022-11-19 08:19:39,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:39,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560858747] [2022-11-19 08:19:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:39,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:44,826 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 08:19:44,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:44,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560858747] [2022-11-19 08:19:44,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560858747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:44,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:19:44,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-19 08:19:44,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207591930] [2022-11-19 08:19:44,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:44,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:19:44,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:19:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:19:44,834 INFO L87 Difference]: Start difference. First operand 90962 states and 376012 transitions. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 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 08:19:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:48,104 INFO L93 Difference]: Finished difference Result 100268 states and 415644 transitions. [2022-11-19 08:19:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:19:48,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 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 69 [2022-11-19 08:19:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:49,652 INFO L225 Difference]: With dead ends: 100268 [2022-11-19 08:19:49,653 INFO L226 Difference]: Without dead ends: 100268 [2022-11-19 08:19:49,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:19:49,655 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 266 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:49,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 249 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-19 08:19:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100268 states. [2022-11-19 08:19:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100268 to 93734. [2022-11-19 08:19:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93734 states, 93733 states have (on average 4.135064491694494) internal successors, (387592), 93733 states have internal predecessors, (387592), 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 08:19:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93734 states to 93734 states and 387592 transitions. [2022-11-19 08:19:55,043 INFO L78 Accepts]: Start accepts. Automaton has 93734 states and 387592 transitions. Word has length 69 [2022-11-19 08:19:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:55,044 INFO L495 AbstractCegarLoop]: Abstraction has 93734 states and 387592 transitions. [2022-11-19 08:19:55,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 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 08:19:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 93734 states and 387592 transitions. [2022-11-19 08:19:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:19:55,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:55,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:55,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:19:55,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-19 08:19:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1433828937, now seen corresponding path program 3 times [2022-11-19 08:19:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:19:55,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52931072] [2022-11-19 08:19:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:55,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:19:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:56,705 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 08:19:56,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:56,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52931072] [2022-11-19 08:19:56,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52931072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:19:56,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:19:56,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:19:56,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181767112] [2022-11-19 08:19:56,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:19:56,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:19:56,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:56,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:19:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:19:56,709 INFO L87 Difference]: Start difference. First operand 93734 states and 387592 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 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 08:20:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:01,101 INFO L93 Difference]: Finished difference Result 203374 states and 846961 transitions. [2022-11-19 08:20:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:20:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 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 69 [2022-11-19 08:20:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:03,489 INFO L225 Difference]: With dead ends: 203374 [2022-11-19 08:20:03,489 INFO L226 Difference]: Without dead ends: 203374 [2022-11-19 08:20:03,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:20:03,495 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 264 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:03,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 144 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:20:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203374 states. [2022-11-19 08:20:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203374 to 139542. [2022-11-19 08:20:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139542 states, 139541 states have (on average 4.1515468571960925) internal successors, (579311), 139541 states have internal predecessors, (579311), 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 08:20:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139542 states to 139542 states and 579311 transitions. [2022-11-19 08:20:12,394 INFO L78 Accepts]: Start accepts. Automaton has 139542 states and 579311 transitions. Word has length 69 [2022-11-19 08:20:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:12,396 INFO L495 AbstractCegarLoop]: Abstraction has 139542 states and 579311 transitions. [2022-11-19 08:20:12,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 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 08:20:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 139542 states and 579311 transitions. [2022-11-19 08:20:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:20:12,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:12,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:12,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:20:12,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-19 08:20:12,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:12,996 INFO L85 PathProgramCache]: Analyzing trace with hash -909556969, now seen corresponding path program 4 times [2022-11-19 08:20:12,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:12,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721727384] [2022-11-19 08:20:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:12,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:20:13,537 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 08:20:13,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:20:13,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721727384] [2022-11-19 08:20:13,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721727384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:20:13,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:20:13,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 08:20:13,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147616631] [2022-11-19 08:20:13,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:20:13,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:20:13,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:20:13,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:20:13,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:20:13,548 INFO L87 Difference]: Start difference. First operand 139542 states and 579311 transitions. Second operand has 11 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 08:20:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:16,945 INFO L93 Difference]: Finished difference Result 168283 states and 678738 transitions. [2022-11-19 08:20:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:20:16,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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 69 [2022-11-19 08:20:16,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:18,993 INFO L225 Difference]: With dead ends: 168283 [2022-11-19 08:20:18,993 INFO L226 Difference]: Without dead ends: 167934 [2022-11-19 08:20:18,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:20:18,994 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 456 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 2096 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:18,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 284 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2096 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time]