./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9 --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 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --- 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-6b4ec56 [2022-11-20 20:36:11,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:36:11,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:36:11,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:36:11,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:36:11,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:36:11,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:36:11,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:36:11,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:36:11,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:36:11,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:36:11,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:36:11,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:36:11,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:36:11,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:36:11,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:36:11,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:36:11,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:36:11,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:36:11,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:36:11,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:36:11,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:36:11,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:36:11,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:36:11,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:36:11,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:36:11,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:36:11,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:36:11,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:36:11,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:36:11,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:36:11,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:36:11,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:36:11,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:36:11,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:36:11,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:36:11,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:36:11,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:36:11,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:36:11,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:36:11,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:36:11,714 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:36:11,756 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:36:11,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:36:11,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:36:11,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:36:11,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:36:11,758 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:36:11,759 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:36:11,759 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:36:11,759 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:36:11,759 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:36:11,760 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:36:11,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:36:11,761 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:36:11,761 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:36:11,762 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:36:11,762 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:36:11,762 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:36:11,762 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:36:11,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:36:11,763 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:36:11,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:36:11,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:36:11,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:36:11,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:36:11,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:36:11,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:36:11,766 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:36:11,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:36:11,766 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:36:11,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:36:11,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:36:11,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:36:11,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:36:11,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:36:11,768 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:36:11,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:36:11,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:36:11,768 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:36:11,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:36:11,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:36:11,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:36:11,769 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_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 [2022-11-20 20:36:12,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:36:12,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:36:12,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:36:12,113 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:36:12,113 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:36:12,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-11-20 20:36:15,387 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:36:15,654 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:36:15,655 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-11-20 20:36:15,684 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/data/0bb7a19ee/cb9848b6cc4a4b8a958ae8b9667ed7c6/FLAG545694503 [2022-11-20 20:36:15,708 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/data/0bb7a19ee/cb9848b6cc4a4b8a958ae8b9667ed7c6 [2022-11-20 20:36:15,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:36:15,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:36:15,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:36:15,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:36:15,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:36:15,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:36:15" (1/1) ... [2022-11-20 20:36:15,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e704a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:15, skipping insertion in model container [2022-11-20 20:36:15,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:36:15" (1/1) ... [2022-11-20 20:36:15,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:36:15,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:36:16,062 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-20 20:36:16,216 WARN L237 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_efc3b452-7420-4b60-a610-ea622efd8ca0/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-11-20 20:36:16,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:36:16,243 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:36:16,278 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-20 20:36:16,317 WARN L237 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_efc3b452-7420-4b60-a610-ea622efd8ca0/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-11-20 20:36:16,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:36:16,362 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:36:16,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16 WrapperNode [2022-11-20 20:36:16,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:36:16,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:36:16,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:36:16,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:36:16,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,437 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 75 [2022-11-20 20:36:16,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:36:16,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:36:16,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:36:16,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:36:16,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,463 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:36:16,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:36:16,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:36:16,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:36:16,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (1/1) ... [2022-11-20 20:36:16,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:36:16,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:36:16,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:36:16,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc3b452-7420-4b60-a610-ea622efd8ca0/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:36:16,566 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-20 20:36:16,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-20 20:36:16,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:36:16,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 20:36:16,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:36:16,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:36:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:36:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:36:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 20:36:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:36:16,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:36:16,571 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 20:36:16,759 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:36:16,761 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:36:16,976 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:36:17,023 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:36:17,023 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:36:17,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:36:17 BoogieIcfgContainer [2022-11-20 20:36:17,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:36:17,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:36:17,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:36:17,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:36:17,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:36:15" (1/3) ... [2022-11-20 20:36:17,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336b068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:36:17, skipping insertion in model container [2022-11-20 20:36:17,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:36:16" (2/3) ... [2022-11-20 20:36:17,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336b068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:36:17, skipping insertion in model container [2022-11-20 20:36:17,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:36:17" (3/3) ... [2022-11-20 20:36:17,035 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2022-11-20 20:36:17,045 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 20:36:17,092 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:36:17,092 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:36:17,092 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 20:36:17,208 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:36:17,248 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:36:17,263 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 69 transitions, 143 flow [2022-11-20 20:36:17,267 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 69 transitions, 143 flow [2022-11-20 20:36:17,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 143 flow [2022-11-20 20:36:17,314 INFO L130 PetriNetUnfolder]: 4/80 cut-off events. [2022-11-20 20:36:17,314 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 20:36:17,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 4/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2022-11-20 20:36:17,322 INFO L119 LiptonReduction]: Number of co-enabled transitions 1092 [2022-11-20 20:36:19,637 INFO L134 LiptonReduction]: Checked pairs total: 924 [2022-11-20 20:36:19,637 INFO L136 LiptonReduction]: Total number of compositions: 68 [2022-11-20 20:36:19,646 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 12 places, 10 transitions, 25 flow [2022-11-20 20:36:19,662 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 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) [2022-11-20 20:36:19,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:36:19,700 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;@737c29f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:36:19,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 20:36:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 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) [2022-11-20 20:36:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:36:19,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:19,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:36:19,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:36:19,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:19,726 INFO L85 PathProgramCache]: Analyzing trace with hash 10935913, now seen corresponding path program 1 times [2022-11-20 20:36:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:19,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593389594] [2022-11-20 20:36:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:19,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:36:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:36:20,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:36:20,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593389594] [2022-11-20 20:36:20,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593389594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:36:20,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:36:20,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:36:20,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732673522] [2022-11-20 20:36:20,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:36:20,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:36:20,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:36:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:36:20,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:20,094 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:36:20,141 INFO L93 Difference]: Finished difference Result 15 states and 24 transitions. [2022-11-20 20:36:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:36:20,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-20 20:36:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:36:20,152 INFO L225 Difference]: With dead ends: 15 [2022-11-20 20:36:20,153 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 20:36:20,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:20,161 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:36:20,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:36:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 20:36:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 20:36:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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) [2022-11-20 20:36:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 24 transitions. [2022-11-20 20:36:20,203 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 24 transitions. Word has length 4 [2022-11-20 20:36:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:36:20,205 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 24 transitions. [2022-11-20 20:36:20,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 24 transitions. [2022-11-20 20:36:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:36:20,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:20,212 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-20 20:36:20,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:36:20,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:36:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1919441356, now seen corresponding path program 1 times [2022-11-20 20:36:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:20,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046054684] [2022-11-20 20:36:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:20,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:20,271 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:36:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:20,337 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:36:20,338 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:36:20,340 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-20 20:36:20,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-20 20:36:20,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-20 20:36:20,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:36:20,347 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 20:36:20,350 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:36:20,350 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 20:36:20,402 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:36:20,413 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:36:20,413 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 230 flow [2022-11-20 20:36:20,413 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 230 flow [2022-11-20 20:36:20,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 230 flow [2022-11-20 20:36:20,477 INFO L130 PetriNetUnfolder]: 7/133 cut-off events. [2022-11-20 20:36:20,477 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 20:36:20,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 7/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 207 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2022-11-20 20:36:20,483 INFO L119 LiptonReduction]: Number of co-enabled transitions 5304 [2022-11-20 20:36:23,296 INFO L134 LiptonReduction]: Checked pairs total: 6255 [2022-11-20 20:36:23,296 INFO L136 LiptonReduction]: Total number of compositions: 107 [2022-11-20 20:36:23,298 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 22 transitions, 56 flow [2022-11-20 20:36:23,345 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 229 states, 221 states have (on average 3.067873303167421) internal successors, (678), 228 states have internal predecessors, (678), 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) [2022-11-20 20:36:23,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:36:23,348 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;@737c29f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:36:23,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 20:36:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 221 states have (on average 3.067873303167421) internal successors, (678), 228 states have internal predecessors, (678), 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) [2022-11-20 20:36:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:36:23,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:23,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:36:23,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 20:36:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash 18726956, now seen corresponding path program 1 times [2022-11-20 20:36:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:23,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80783127] [2022-11-20 20:36:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:36:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:36:23,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:36:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80783127] [2022-11-20 20:36:23,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80783127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:36:23,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:36:23,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:36:23,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775963697] [2022-11-20 20:36:23,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:36:23,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:36:23,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:36:23,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:36:23,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:23,428 INFO L87 Difference]: Start difference. First operand has 229 states, 221 states have (on average 3.067873303167421) internal successors, (678), 228 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:36:23,488 INFO L93 Difference]: Finished difference Result 168 states and 439 transitions. [2022-11-20 20:36:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:36:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-20 20:36:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:36:23,493 INFO L225 Difference]: With dead ends: 168 [2022-11-20 20:36:23,494 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 20:36:23,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:23,495 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:36:23,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 6 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:36:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 20:36:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-11-20 20:36:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 165 states have (on average 2.6606060606060606) internal successors, (439), 167 states have internal predecessors, (439), 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) [2022-11-20 20:36:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 439 transitions. [2022-11-20 20:36:23,517 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 439 transitions. Word has length 4 [2022-11-20 20:36:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:36:23,518 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 439 transitions. [2022-11-20 20:36:23,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 439 transitions. [2022-11-20 20:36:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:36:23,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:23,519 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:36:23,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:36:23,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 20:36:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:23,521 INFO L85 PathProgramCache]: Analyzing trace with hash -609277487, now seen corresponding path program 1 times [2022-11-20 20:36:23,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:23,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864755421] [2022-11-20 20:36:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:23,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:36:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:36:23,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:36:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864755421] [2022-11-20 20:36:23,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864755421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:36:23,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:36:23,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:36:23,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267837656] [2022-11-20 20:36:23,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:36:23,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:36:23,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:36:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:36:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:23,611 INFO L87 Difference]: Start difference. First operand 168 states and 439 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-20 20:36:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:36:23,644 INFO L93 Difference]: Finished difference Result 148 states and 393 transitions. [2022-11-20 20:36:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:36:23,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-11-20 20:36:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:36:23,647 INFO L225 Difference]: With dead ends: 148 [2022-11-20 20:36:23,647 INFO L226 Difference]: Without dead ends: 148 [2022-11-20 20:36:23,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:23,648 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:36:23,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 3 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:36:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-20 20:36:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-20 20:36:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.673469387755102) internal successors, (393), 147 states have internal predecessors, (393), 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) [2022-11-20 20:36:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 393 transitions. [2022-11-20 20:36:23,685 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 393 transitions. Word has length 11 [2022-11-20 20:36:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:36:23,685 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 393 transitions. [2022-11-20 20:36:23,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-20 20:36:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 393 transitions. [2022-11-20 20:36:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:36:23,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:23,687 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 20:36:23,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:36:23,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 20:36:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:23,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1377508917, now seen corresponding path program 1 times [2022-11-20 20:36:23,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:23,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661961129] [2022-11-20 20:36:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:23,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:23,720 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:36:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:23,742 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:36:23,750 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:36:23,750 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-20 20:36:23,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-20 20:36:23,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-20 20:36:23,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-20 20:36:23,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:36:23,752 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 20:36:23,752 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:36:23,752 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 20:36:23,811 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:36:23,814 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:36:23,814 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 149 transitions, 319 flow [2022-11-20 20:36:23,815 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 149 transitions, 319 flow [2022-11-20 20:36:23,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 149 transitions, 319 flow [2022-11-20 20:36:23,856 INFO L130 PetriNetUnfolder]: 10/186 cut-off events. [2022-11-20 20:36:23,856 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 20:36:23,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 186 events. 10/186 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 424 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2022-11-20 20:36:23,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 12636 [2022-11-20 20:36:27,787 INFO L134 LiptonReduction]: Checked pairs total: 15087 [2022-11-20 20:36:27,787 INFO L136 LiptonReduction]: Total number of compositions: 148 [2022-11-20 20:36:27,788 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 30 transitions, 81 flow [2022-11-20 20:36:27,881 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1425 states, 1406 states have (on average 4.166429587482219) internal successors, (5858), 1424 states have internal predecessors, (5858), 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) [2022-11-20 20:36:27,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:36:27,891 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;@737c29f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:36:27,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 20:36:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 1425 states, 1406 states have (on average 4.166429587482219) internal successors, (5858), 1424 states have internal predecessors, (5858), 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) [2022-11-20 20:36:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:36:27,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:27,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:36:27,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 20:36:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash 28909581, now seen corresponding path program 1 times [2022-11-20 20:36:27,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:27,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114481744] [2022-11-20 20:36:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:27,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:36:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:36:27,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:36:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114481744] [2022-11-20 20:36:27,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114481744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:36:27,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:36:27,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:36:27,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477405151] [2022-11-20 20:36:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:36:27,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:36:27,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:36:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:36:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:27,977 INFO L87 Difference]: Start difference. First operand has 1425 states, 1406 states have (on average 4.166429587482219) internal successors, (5858), 1424 states have internal predecessors, (5858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:36:28,079 INFO L93 Difference]: Finished difference Result 1034 states and 3679 transitions. [2022-11-20 20:36:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:36:28,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-20 20:36:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:36:28,095 INFO L225 Difference]: With dead ends: 1034 [2022-11-20 20:36:28,095 INFO L226 Difference]: Without dead ends: 1034 [2022-11-20 20:36:28,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:28,098 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:36:28,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:36:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-20 20:36:28,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2022-11-20 20:36:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1027 states have (on average 3.5822784810126582) internal successors, (3679), 1033 states have internal predecessors, (3679), 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) [2022-11-20 20:36:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3679 transitions. [2022-11-20 20:36:28,196 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3679 transitions. Word has length 4 [2022-11-20 20:36:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:36:28,196 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 3679 transitions. [2022-11-20 20:36:28,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3679 transitions. [2022-11-20 20:36:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:36:28,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:28,198 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:36:28,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:36:28,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 20:36:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1706499056, now seen corresponding path program 1 times [2022-11-20 20:36:28,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:28,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620274160] [2022-11-20 20:36:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:28,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:36:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:36:28,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:36:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620274160] [2022-11-20 20:36:28,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620274160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:36:28,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:36:28,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:36:28,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100632426] [2022-11-20 20:36:28,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:36:28,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:36:28,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:36:28,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:36:28,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:28,301 INFO L87 Difference]: Start difference. First operand 1034 states and 3679 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:36:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:36:28,344 INFO L93 Difference]: Finished difference Result 748 states and 2718 transitions. [2022-11-20 20:36:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:36:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:36:28,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:36:28,352 INFO L225 Difference]: With dead ends: 748 [2022-11-20 20:36:28,352 INFO L226 Difference]: Without dead ends: 748 [2022-11-20 20:36:28,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:28,353 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:36:28,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 3 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:36:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-20 20:36:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-20 20:36:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.63855421686747) internal successors, (2718), 747 states have internal predecessors, (2718), 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) [2022-11-20 20:36:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2718 transitions. [2022-11-20 20:36:28,388 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2718 transitions. Word has length 11 [2022-11-20 20:36:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:36:28,389 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2718 transitions. [2022-11-20 20:36:28,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:36:28,390 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2718 transitions. [2022-11-20 20:36:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:36:28,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:28,392 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-20 20:36:28,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:36:28,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 20:36:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:28,393 INFO L85 PathProgramCache]: Analyzing trace with hash -763775154, now seen corresponding path program 1 times [2022-11-20 20:36:28,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:28,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977221276] [2022-11-20 20:36:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:28,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:28,406 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:36:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:28,419 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:36:28,420 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:36:28,420 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 20:36:28,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 20:36:28,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 20:36:28,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 20:36:28,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 20:36:28,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:36:28,422 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 20:36:28,422 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:36:28,422 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 20:36:28,451 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:36:28,454 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:36:28,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 189 transitions, 410 flow [2022-11-20 20:36:28,455 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 189 transitions, 410 flow [2022-11-20 20:36:28,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 189 transitions, 410 flow [2022-11-20 20:36:28,502 INFO L130 PetriNetUnfolder]: 13/239 cut-off events. [2022-11-20 20:36:28,503 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 20:36:28,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 239 events. 13/239 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 664 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 194. Up to 10 conditions per place. [2022-11-20 20:36:28,523 INFO L119 LiptonReduction]: Number of co-enabled transitions 23088 [2022-11-20 20:36:33,157 INFO L134 LiptonReduction]: Checked pairs total: 27547 [2022-11-20 20:36:33,158 INFO L136 LiptonReduction]: Total number of compositions: 190 [2022-11-20 20:36:33,159 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 38 transitions, 108 flow [2022-11-20 20:36:33,592 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8729 states, 8687 states have (on average 5.304247726487856) internal successors, (46078), 8728 states have internal predecessors, (46078), 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) [2022-11-20 20:36:33,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:36:33,593 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;@737c29f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:36:33,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 20:36:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 8729 states, 8687 states have (on average 5.304247726487856) internal successors, (46078), 8728 states have internal predecessors, (46078), 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) [2022-11-20 20:36:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:36:33,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:33,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:36:33,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 20:36:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash 41947054, now seen corresponding path program 1 times [2022-11-20 20:36:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:33,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51302686] [2022-11-20 20:36:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:36:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:36:33,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:36:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51302686] [2022-11-20 20:36:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51302686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:36:33,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:36:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:36:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777970933] [2022-11-20 20:36:33,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:36:33,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:36:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:36:33,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:36:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:33,704 INFO L87 Difference]: Start difference. First operand has 8729 states, 8687 states have (on average 5.304247726487856) internal successors, (46078), 8728 states have internal predecessors, (46078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:36:33,908 INFO L93 Difference]: Finished difference Result 6460 states and 29327 transitions. [2022-11-20 20:36:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:36:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-20 20:36:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:36:34,073 INFO L225 Difference]: With dead ends: 6460 [2022-11-20 20:36:34,086 INFO L226 Difference]: Without dead ends: 6460 [2022-11-20 20:36:34,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:34,165 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:36:34,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:36:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2022-11-20 20:36:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 6460. [2022-11-20 20:36:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6460 states, 6445 states have (on average 4.550349107835531) internal successors, (29327), 6459 states have internal predecessors, (29327), 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) [2022-11-20 20:36:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6460 states to 6460 states and 29327 transitions. [2022-11-20 20:36:34,651 INFO L78 Accepts]: Start accepts. Automaton has 6460 states and 29327 transitions. Word has length 4 [2022-11-20 20:36:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:36:34,651 INFO L495 AbstractCegarLoop]: Abstraction has 6460 states and 29327 transitions. [2022-11-20 20:36:34,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6460 states and 29327 transitions. [2022-11-20 20:36:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:36:34,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:34,657 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:36:34,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:36:34,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 20:36:34,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash 842863763, now seen corresponding path program 1 times [2022-11-20 20:36:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:34,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607332631] [2022-11-20 20:36:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:34,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:36:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:36:34,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:36:34,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607332631] [2022-11-20 20:36:34,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607332631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:36:34,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:36:34,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:36:34,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269008073] [2022-11-20 20:36:34,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:36:34,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:36:34,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:36:34,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:36:34,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:34,787 INFO L87 Difference]: Start difference. First operand 6460 states and 29327 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-20 20:36:34,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:36:34,889 INFO L93 Difference]: Finished difference Result 3748 states and 17343 transitions. [2022-11-20 20:36:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:36:34,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-11-20 20:36:34,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:36:34,923 INFO L225 Difference]: With dead ends: 3748 [2022-11-20 20:36:34,923 INFO L226 Difference]: Without dead ends: 3748 [2022-11-20 20:36:34,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:34,924 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:36:34,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:36:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-11-20 20:36:35,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3748. [2022-11-20 20:36:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 4.628502802241793) internal successors, (17343), 3747 states have internal predecessors, (17343), 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) [2022-11-20 20:36:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 17343 transitions. [2022-11-20 20:36:35,167 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 17343 transitions. Word has length 11 [2022-11-20 20:36:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:36:35,168 INFO L495 AbstractCegarLoop]: Abstraction has 3748 states and 17343 transitions. [2022-11-20 20:36:35,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-20 20:36:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 17343 transitions. [2022-11-20 20:36:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 20:36:35,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:35,172 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 20:36:35,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:36:35,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 20:36:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:35,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1816389739, now seen corresponding path program 1 times [2022-11-20 20:36:35,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:35,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231873276] [2022-11-20 20:36:35,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:35,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:35,200 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:36:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:35,236 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:36:35,236 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:36:35,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 20:36:35,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 20:36:35,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-20 20:36:35,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 20:36:35,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 20:36:35,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 20:36:35,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:36:35,239 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 20:36:35,240 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:36:35,241 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 20:36:35,290 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:36:35,293 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:36:35,294 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 229 transitions, 503 flow [2022-11-20 20:36:35,294 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 229 transitions, 503 flow [2022-11-20 20:36:35,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 229 transitions, 503 flow [2022-11-20 20:36:35,465 INFO L130 PetriNetUnfolder]: 16/292 cut-off events. [2022-11-20 20:36:35,465 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 20:36:35,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 292 events. 16/292 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 898 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 252. Up to 12 conditions per place. [2022-11-20 20:36:35,482 INFO L119 LiptonReduction]: Number of co-enabled transitions 36660 [2022-11-20 20:36:41,173 INFO L134 LiptonReduction]: Checked pairs total: 43427 [2022-11-20 20:36:41,173 INFO L136 LiptonReduction]: Total number of compositions: 230 [2022-11-20 20:36:41,175 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 46 transitions, 137 flow [2022-11-20 20:36:43,378 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53065 states, 52976 states have (on average 6.462662337662338) internal successors, (342366), 53064 states have internal predecessors, (342366), 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) [2022-11-20 20:36:43,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:36:43,379 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;@737c29f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:36:43,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 20:36:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 53065 states, 52976 states have (on average 6.462662337662338) internal successors, (342366), 53064 states have internal predecessors, (342366), 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) [2022-11-20 20:36:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:36:43,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:43,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:36:43,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 20:36:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash 57223389, now seen corresponding path program 1 times [2022-11-20 20:36:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:43,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340673509] [2022-11-20 20:36:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:43,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:36:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:36:43,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:36:43,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340673509] [2022-11-20 20:36:43,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340673509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:36:43,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:36:43,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:36:43,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713369863] [2022-11-20 20:36:43,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:36:43,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:36:43,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:36:43,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:36:43,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:43,964 INFO L87 Difference]: Start difference. First operand has 53065 states, 52976 states have (on average 6.462662337662338) internal successors, (342366), 53064 states have internal predecessors, (342366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:36:44,997 INFO L93 Difference]: Finished difference Result 40314 states and 223471 transitions. [2022-11-20 20:36:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:36:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-20 20:36:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:36:45,615 INFO L225 Difference]: With dead ends: 40314 [2022-11-20 20:36:45,615 INFO L226 Difference]: Without dead ends: 40314 [2022-11-20 20:36:45,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:45,617 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:36:45,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:36:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40314 states. [2022-11-20 20:36:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40314 to 40314. [2022-11-20 20:36:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40314 states, 40283 states have (on average 5.547526251768736) internal successors, (223471), 40313 states have internal predecessors, (223471), 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) [2022-11-20 20:36:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40314 states to 40314 states and 223471 transitions. [2022-11-20 20:36:48,668 INFO L78 Accepts]: Start accepts. Automaton has 40314 states and 223471 transitions. Word has length 4 [2022-11-20 20:36:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:36:48,669 INFO L495 AbstractCegarLoop]: Abstraction has 40314 states and 223471 transitions. [2022-11-20 20:36:48,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:36:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 40314 states and 223471 transitions. [2022-11-20 20:36:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:36:48,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:48,670 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:36:48,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:36:48,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 20:36:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:48,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1515974964, now seen corresponding path program 1 times [2022-11-20 20:36:48,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:48,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977365978] [2022-11-20 20:36:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:48,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:36:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:36:48,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:36:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977365978] [2022-11-20 20:36:48,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977365978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:36:48,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:36:48,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:36:48,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637053303] [2022-11-20 20:36:48,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:36:48,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:36:48,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:36:48,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:36:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:48,723 INFO L87 Difference]: Start difference. First operand 40314 states and 223471 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:36:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:36:49,071 INFO L93 Difference]: Finished difference Result 18748 states and 105468 transitions. [2022-11-20 20:36:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:36:49,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:36:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:36:49,654 INFO L225 Difference]: With dead ends: 18748 [2022-11-20 20:36:49,654 INFO L226 Difference]: Without dead ends: 18748 [2022-11-20 20:36:49,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:36:49,655 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:36:49,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:36:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18748 states. [2022-11-20 20:36:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18748 to 18748. [2022-11-20 20:36:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18748 states, 18747 states have (on average 5.62586013762202) internal successors, (105468), 18747 states have internal predecessors, (105468), 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) [2022-11-20 20:36:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18748 states to 18748 states and 105468 transitions. [2022-11-20 20:36:50,692 INFO L78 Accepts]: Start accepts. Automaton has 18748 states and 105468 transitions. Word has length 11 [2022-11-20 20:36:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:36:50,692 INFO L495 AbstractCegarLoop]: Abstraction has 18748 states and 105468 transitions. [2022-11-20 20:36:50,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:36:50,693 INFO L276 IsEmpty]: Start isEmpty. Operand 18748 states and 105468 transitions. [2022-11-20 20:36:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 20:36:50,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:36:50,701 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:36:50,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 20:36:50,701 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 20:36:50,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:36:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash 659307859, now seen corresponding path program 1 times [2022-11-20 20:36:50,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:36:50,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886856146] [2022-11-20 20:36:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:36:50,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:36:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:50,721 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:36:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:36:50,734 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:36:50,735 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:36:50,735 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-20 20:36:50,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-20 20:36:50,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-20 20:36:50,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-20 20:36:50,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-20 20:36:50,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-20 20:36:50,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-20 20:36:50,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 20:36:50,737 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 20:36:50,737 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:36:50,737 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-20 20:36:50,773 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:36:50,777 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:36:50,777 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 269 transitions, 598 flow [2022-11-20 20:36:50,778 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 269 transitions, 598 flow [2022-11-20 20:36:50,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 269 transitions, 598 flow [2022-11-20 20:36:50,854 INFO L130 PetriNetUnfolder]: 19/345 cut-off events. [2022-11-20 20:36:50,855 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-20 20:36:50,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 345 events. 19/345 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1149 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 311. Up to 14 conditions per place. [2022-11-20 20:36:50,879 INFO L119 LiptonReduction]: Number of co-enabled transitions 53352 [2022-11-20 20:36:57,286 INFO L134 LiptonReduction]: Checked pairs total: 59343 [2022-11-20 20:36:57,286 INFO L136 LiptonReduction]: Total number of compositions: 269 [2022-11-20 20:36:57,288 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 54 transitions, 168 flow [2022-11-20 20:37:14,101 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 321129 states, 320945 states have (on average 7.630210783779153) internal successors, (2448878), 321128 states have internal predecessors, (2448878), 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) [2022-11-20 20:37:14,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:37:14,102 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;@737c29f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:37:14,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-20 20:37:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 321129 states, 320945 states have (on average 7.630210783779153) internal successors, (2448878), 321128 states have internal predecessors, (2448878), 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) [2022-11-20 20:37:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:37:14,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:37:14,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:37:14,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-20 20:37:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:37:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash 74991254, now seen corresponding path program 1 times [2022-11-20 20:37:14,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:37:14,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598247319] [2022-11-20 20:37:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:37:14,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:37:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:37:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:37:14,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:37:14,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598247319] [2022-11-20 20:37:14,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598247319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:37:14,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:37:14,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:37:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557692490] [2022-11-20 20:37:14,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:37:14,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:37:14,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:37:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:37:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:37:15,229 INFO L87 Difference]: Start difference. First operand has 321129 states, 320945 states have (on average 7.630210783779153) internal successors, (2448878), 321128 states have internal predecessors, (2448878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:37:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:37:22,784 INFO L93 Difference]: Finished difference Result 249764 states and 1637767 transitions. [2022-11-20 20:37:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:37:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-20 20:37:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:37:26,402 INFO L225 Difference]: With dead ends: 249764 [2022-11-20 20:37:26,403 INFO L226 Difference]: Without dead ends: 249764 [2022-11-20 20:37:26,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:37:26,404 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:37:26,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 6 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:37:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249764 states.