./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/fk2012.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-lit/fk2012.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI --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 25a65bfeb78eff83ae0d8a23f733f9dc95190d8c8aa20c7c495d09a2bd7eb6f0 --- 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-5e519f3 [2022-11-03 01:42:23,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:42:23,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:42:23,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:42:23,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:42:23,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:42:23,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:42:23,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:42:23,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:42:23,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:42:23,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:42:23,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:42:23,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:42:23,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:42:23,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:42:23,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:42:23,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:42:23,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:42:23,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:42:23,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:42:23,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:42:23,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:42:23,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:42:23,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:42:23,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:42:23,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:42:23,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:42:23,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:42:23,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:42:23,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:42:23,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:42:23,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:42:23,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:42:23,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:42:23,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:42:23,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:42:23,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:42:23,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:42:23,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:42:23,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:42:23,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:42:23,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:42:23,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:42:23,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:42:23,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:42:23,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:42:23,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:42:23,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:42:23,683 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:42:23,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:42:23,683 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:42:23,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:42:23,684 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:42:23,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:42:23,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:42:23,684 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:42:23,684 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:42:23,685 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:42:23,685 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:42:23,685 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:42:23,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:42:23,686 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:42:23,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:42:23,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:42:23,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:42:23,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:42:23,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:42:23,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:42:23,688 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:42:23,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:42:23,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:42:23,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:42:23,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:42:23,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:42:23,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:23,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:42:23,689 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:42:23,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:42:23,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:42:23,690 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:42:23,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:42:23,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:42:23,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:42:23,691 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_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25a65bfeb78eff83ae0d8a23f733f9dc95190d8c8aa20c7c495d09a2bd7eb6f0 [2022-11-03 01:42:24,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:42:24,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:42:24,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:42:24,052 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:42:24,052 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:42:24,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/pthread-lit/fk2012.i [2022-11-03 01:42:24,116 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/data/ff2822a70/c5dacff79f07440d8bba52e68e1d4d1d/FLAGc731fca6d [2022-11-03 01:42:24,754 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:42:24,754 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/sv-benchmarks/c/pthread-lit/fk2012.i [2022-11-03 01:42:24,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/data/ff2822a70/c5dacff79f07440d8bba52e68e1d4d1d/FLAGc731fca6d [2022-11-03 01:42:24,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/data/ff2822a70/c5dacff79f07440d8bba52e68e1d4d1d [2022-11-03 01:42:25,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:42:25,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:42:25,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:25,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:42:25,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:42:25,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5bc9ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25, skipping insertion in model container [2022-11-03 01:42:25,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:42:25,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:42:25,286 WARN L230 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_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/sv-benchmarks/c/pthread-lit/fk2012.i[800,813] [2022-11-03 01:42:25,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:25,660 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:42:25,677 WARN L230 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_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/sv-benchmarks/c/pthread-lit/fk2012.i[800,813] [2022-11-03 01:42:25,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:25,785 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:42:25,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25 WrapperNode [2022-11-03 01:42:25,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:25,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:25,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:42:25,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:42:25,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,870 INFO L138 Inliner]: procedures = 277, calls = 35, calls flagged for inlining = 16, calls inlined = 21, statements flattened = 158 [2022-11-03 01:42:25,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:25,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:42:25,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:42:25,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:42:25,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,901 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:42:25,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:42:25,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:42:25,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:42:25,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (1/1) ... [2022-11-03 01:42:25,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:25,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:25,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:42:25,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_683f66cb-e82c-4ef7-aa3f-9e91c6df5dcd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:42:26,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-03 01:42:26,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:42:26,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:42:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-03 01:42:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:42:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:42:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure producer [2022-11-03 01:42:26,005 INFO L138 BoogieDeclarations]: Found implementation of procedure producer [2022-11-03 01:42:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure consumer [2022-11-03 01:42:26,006 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer [2022-11-03 01:42:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:42:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:42:26,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:42:26,008 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-03 01:42:26,247 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:42:26,249 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:42:26,619 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:42:26,712 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:42:26,712 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 01:42:26,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:26 BoogieIcfgContainer [2022-11-03 01:42:26,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:42:26,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:42:26,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:42:26,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:42:26,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:42:25" (1/3) ... [2022-11-03 01:42:26,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64027036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:26, skipping insertion in model container [2022-11-03 01:42:26,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:25" (2/3) ... [2022-11-03 01:42:26,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64027036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:26, skipping insertion in model container [2022-11-03 01:42:26,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:26" (3/3) ... [2022-11-03 01:42:26,734 INFO L112 eAbstractionObserver]: Analyzing ICFG fk2012.i [2022-11-03 01:42:26,749 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-03 01:42:26,760 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:42:26,760 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:42:26,761 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-03 01:42:26,843 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-03 01:42:26,887 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 01:42:26,902 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 119 transitions, 248 flow [2022-11-03 01:42:26,911 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 119 transitions, 248 flow [2022-11-03 01:42:26,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 119 transitions, 248 flow [2022-11-03 01:42:27,079 INFO L130 PetriNetUnfolder]: 19/258 cut-off events. [2022-11-03 01:42:27,079 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-03 01:42:27,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 258 events. 19/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 960 event pairs, 1 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 120. Up to 8 conditions per place. [2022-11-03 01:42:27,099 INFO L118 LiptonReduction]: Number of co-enabled transitions 6294 [2022-11-03 01:42:30,312 INFO L133 LiptonReduction]: Checked pairs total: 8563 [2022-11-03 01:42:30,313 INFO L135 LiptonReduction]: Total number of compositions: 103 [2022-11-03 01:42:30,325 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 32 transitions, 74 flow [2022-11-03 01:42:30,409 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 903 states, 894 states have (on average 2.9787472035794185) internal successors, (2663), 902 states have internal predecessors, (2663), 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) [2022-11-03 01:42:30,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:42:30,437 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;@64595362, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:42:30,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-03 01:42:30,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 903 states, 894 states have (on average 2.9787472035794185) internal successors, (2663), 902 states have internal predecessors, (2663), 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) [2022-11-03 01:42:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:42:30,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:30,450 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-03 01:42:30,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-03 01:42:30,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1610778297, now seen corresponding path program 1 times [2022-11-03 01:42:30,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:30,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439352010] [2022-11-03 01:42:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:30,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:42:30,618 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:42:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:42:30,705 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:42:30,707 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:42:30,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-03 01:42:30,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-11-03 01:42:30,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-03 01:42:30,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-03 01:42:30,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:42:30,716 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:42:30,720 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-03 01:42:30,721 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-03 01:42:30,771 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-03 01:42:30,778 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 01:42:30,778 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 192 transitions, 408 flow [2022-11-03 01:42:30,779 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 192 transitions, 408 flow [2022-11-03 01:42:30,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 192 transitions, 408 flow [2022-11-03 01:42:30,956 INFO L130 PetriNetUnfolder]: 55/668 cut-off events. [2022-11-03 01:42:30,956 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-03 01:42:30,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 668 events. 55/668 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3738 event pairs, 4 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 437. Up to 18 conditions per place. [2022-11-03 01:42:31,034 INFO L118 LiptonReduction]: Number of co-enabled transitions 23096 [2022-11-03 01:42:35,001 INFO L133 LiptonReduction]: Checked pairs total: 40537 [2022-11-03 01:42:35,001 INFO L135 LiptonReduction]: Total number of compositions: 156 [2022-11-03 01:42:35,003 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 66 transitions, 156 flow [2022-11-03 01:42:43,814 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 212257 states, 212226 states have (on average 5.189962587053424) internal successors, (1101445), 212256 states have internal predecessors, (1101445), 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) [2022-11-03 01:42:43,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:42:43,834 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;@64595362, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:42:43,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-03 01:42:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 212257 states, 212226 states have (on average 5.189962587053424) internal successors, (1101445), 212256 states have internal predecessors, (1101445), 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) [2022-11-03 01:42:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:42:44,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:44,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:42:44,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting consumerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-03 01:42:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2004974824, now seen corresponding path program 1 times [2022-11-03 01:42:44,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:44,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211186399] [2022-11-03 01:42:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:44,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:44,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211186399] [2022-11-03 01:42:44,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211186399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:44,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:44,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:42:44,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332138330] [2022-11-03 01:42:44,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:44,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:42:44,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:44,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:42:44,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:42:45,416 INFO L87 Difference]: Start difference. First operand has 212257 states, 212226 states have (on average 5.189962587053424) internal successors, (1101445), 212256 states have internal predecessors, (1101445), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-03 01:42:49,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:49,774 INFO L93 Difference]: Finished difference Result 191481 states and 936331 transitions. [2022-11-03 01:42:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:42:49,779 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-03 01:42:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:52,679 INFO L225 Difference]: With dead ends: 191481 [2022-11-03 01:42:52,679 INFO L226 Difference]: Without dead ends: 191481 [2022-11-03 01:42:52,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:42:52,683 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:52,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191481 states. [2022-11-03 01:43:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191481 to 191481. [2022-11-03 01:43:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191481 states, 191462 states have (on average 4.89042734328483) internal successors, (936331), 191480 states have internal predecessors, (936331), 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) [2022-11-03 01:43:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191481 states to 191481 states and 936331 transitions. [2022-11-03 01:43:04,618 INFO L78 Accepts]: Start accepts. Automaton has 191481 states and 936331 transitions. Word has length 6 [2022-11-03 01:43:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:04,619 INFO L495 AbstractCegarLoop]: Abstraction has 191481 states and 936331 transitions. [2022-11-03 01:43:04,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-03 01:43:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 191481 states and 936331 transitions. [2022-11-03 01:43:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:43:04,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:04,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:04,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:43:04,622 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting consumerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-03 01:43:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:04,623 INFO L85 PathProgramCache]: Analyzing trace with hash -120939331, now seen corresponding path program 1 times [2022-11-03 01:43:04,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:04,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95608971] [2022-11-03 01:43:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:04,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:04,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:04,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95608971] [2022-11-03 01:43:04,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95608971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:04,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:04,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:43:04,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038154070] [2022-11-03 01:43:04,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:04,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:43:04,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:43:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:43:04,762 INFO L87 Difference]: Start difference. First operand 191481 states and 936331 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-03 01:43:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:07,016 INFO L93 Difference]: Finished difference Result 125025 states and 597476 transitions. [2022-11-03 01:43:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:43:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-11-03 01:43:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:07,992 INFO L225 Difference]: With dead ends: 125025 [2022-11-03 01:43:07,992 INFO L226 Difference]: Without dead ends: 125025 [2022-11-03 01:43:07,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:43:07,994 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:07,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 25 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125025 states. [2022-11-03 01:43:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125025 to 120473. [2022-11-03 01:43:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120473 states, 120457 states have (on average 4.799455407323776) internal successors, (578128), 120472 states have internal predecessors, (578128), 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) [2022-11-03 01:43:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120473 states to 120473 states and 578128 transitions. [2022-11-03 01:43:15,569 INFO L78 Accepts]: Start accepts. Automaton has 120473 states and 578128 transitions. Word has length 9 [2022-11-03 01:43:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:15,569 INFO L495 AbstractCegarLoop]: Abstraction has 120473 states and 578128 transitions. [2022-11-03 01:43:15,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-03 01:43:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 120473 states and 578128 transitions. [2022-11-03 01:43:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:43:15,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:15,571 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-03 01:43:15,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:43:15,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-03 01:43:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1910737985, now seen corresponding path program 1 times [2022-11-03 01:43:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:15,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595024794] [2022-11-03 01:43:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:43:15,617 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:43:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:43:15,638 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:43:15,643 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:43:15,643 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-03 01:43:15,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2022-11-03 01:43:15,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumerErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-03 01:43:15,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-03 01:43:15,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-03 01:43:15,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:43:15,645 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-03 01:43:15,645 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-03 01:43:15,645 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-03 01:43:15,683 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-03 01:43:15,687 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 01:43:15,687 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 265 transitions, 572 flow [2022-11-03 01:43:15,688 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 265 transitions, 572 flow [2022-11-03 01:43:15,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 265 transitions, 572 flow [2022-11-03 01:43:15,981 INFO L130 PetriNetUnfolder]: 109/1272 cut-off events. [2022-11-03 01:43:15,981 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-03 01:43:16,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 1272 events. 109/1272 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 8544 event pairs, 9 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 979. Up to 32 conditions per place. [2022-11-03 01:43:16,085 INFO L118 LiptonReduction]: Number of co-enabled transitions 50406 [2022-11-03 01:43:21,519 INFO L133 LiptonReduction]: Checked pairs total: 89938 [2022-11-03 01:43:21,520 INFO L135 LiptonReduction]: Total number of compositions: 214 [2022-11-03 01:43:21,521 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 92 places, 92 transitions, 226 flow