./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/38_rand_cas_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/38_rand_cas_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 628ef5ad19754647fb807fc1cc13e384334d380a6e3691b7b5f1842f42e5f662 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:39:19,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:39:19,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:39:19,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:39:19,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:39:19,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:39:19,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:39:19,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:39:19,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:39:19,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:39:19,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:39:19,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:39:19,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:39:19,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:39:19,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:39:19,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:39:19,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:39:19,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:39:19,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:39:19,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:39:19,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:39:19,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:39:19,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:39:19,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:39:19,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:39:19,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:39:19,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:39:19,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:39:19,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:39:19,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:39:19,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:39:19,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:39:19,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:39:19,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:39:19,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:39:19,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:39:19,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:39:19,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:39:19,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:39:19,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:39:19,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:39:19,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:39:19,671 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:39:19,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:39:19,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:39:19,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:39:19,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:39:19,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:39:19,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:39:19,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:39:19,676 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:39:19,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:39:19,677 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:39:19,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:39:19,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:39:19,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:39:19,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:39:19,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:39:19,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:39:19,679 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:39:19,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:39:19,680 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:39:19,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:39:19,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:39:19,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:39:19,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:39:19,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:19,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:39:19,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:39:19,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:39:19,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:39:19,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:39:19,684 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:39:19,684 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:39:19,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:39:19,685 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_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 628ef5ad19754647fb807fc1cc13e384334d380a6e3691b7b5f1842f42e5f662 [2022-11-02 20:39:19,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:39:20,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:39:20,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:39:20,043 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:39:20,044 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:39:20,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread-ext/38_rand_cas_vs_concur.i [2022-11-02 20:39:20,140 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/data/a79c8f875/3ebe4622413449a3b3fee7d95d0c37cd/FLAG57ab5a818 [2022-11-02 20:39:20,726 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:39:20,726 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/sv-benchmarks/c/pthread-ext/38_rand_cas_vs_concur.i [2022-11-02 20:39:20,747 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/data/a79c8f875/3ebe4622413449a3b3fee7d95d0c37cd/FLAG57ab5a818 [2022-11-02 20:39:21,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/data/a79c8f875/3ebe4622413449a3b3fee7d95d0c37cd [2022-11-02 20:39:21,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:39:21,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:39:21,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:21,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:39:21,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:39:21,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5063d3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21, skipping insertion in model container [2022-11-02 20:39:21,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:39:21,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:39:21,516 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/sv-benchmarks/c/pthread-ext/38_rand_cas_vs_concur.i[30559,30572] [2022-11-02 20:39:21,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:21,533 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:39:21,622 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/sv-benchmarks/c/pthread-ext/38_rand_cas_vs_concur.i[30559,30572] [2022-11-02 20:39:21,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:21,673 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:39:21,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21 WrapperNode [2022-11-02 20:39:21,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:21,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:21,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:39:21,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:39:21,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,763 INFO L138 Inliner]: procedures = 170, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 91 [2022-11-02 20:39:21,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:21,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:39:21,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:39:21,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:39:21,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,816 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:39:21,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:39:21,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:39:21,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:39:21,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (1/1) ... [2022-11-02 20:39:21,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:21,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:21,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:39:21,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d417e98b-871d-4c97-b400-d547ad2e0be0/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:39:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:39:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-02 20:39:21,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-02 20:39:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:39:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:39:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:39:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:39:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:39:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:39:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:39:21,942 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:39:22,144 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:39:22,147 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:39:22,384 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:39:22,465 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:39:22,466 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:39:22,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:22 BoogieIcfgContainer [2022-11-02 20:39:22,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:39:22,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:39:22,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:39:22,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:39:22,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:39:21" (1/3) ... [2022-11-02 20:39:22,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435f65ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:22, skipping insertion in model container [2022-11-02 20:39:22,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:21" (2/3) ... [2022-11-02 20:39:22,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435f65ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:22, skipping insertion in model container [2022-11-02 20:39:22,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:22" (3/3) ... [2022-11-02 20:39:22,503 INFO L112 eAbstractionObserver]: Analyzing ICFG 38_rand_cas_vs_concur.i [2022-11-02 20:39:22,513 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:39:22,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:39:22,530 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:39:22,530 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:39:22,652 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:39:22,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 90 transitions, 185 flow [2022-11-02 20:39:22,823 INFO L130 PetriNetUnfolder]: 9/101 cut-off events. [2022-11-02 20:39:22,827 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:39:22,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 9/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 114 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2022-11-02 20:39:22,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 90 transitions, 185 flow [2022-11-02 20:39:22,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 90 transitions, 185 flow [2022-11-02 20:39:22,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:22,883 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=PETRI_NET, 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;@6cb9248a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:22,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:39:22,923 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-11-02 20:39:22,925 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:39:22,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:22,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:22,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2125340853, now seen corresponding path program 1 times [2022-11-02 20:39:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:22,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449182796] [2022-11-02 20:39:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:22,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:23,129 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:39:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:23,216 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:39:23,219 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:39:23,221 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-02 20:39:23,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-02 20:39:23,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-02 20:39:23,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:39:23,233 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 20:39:23,238 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:39:23,240 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:39:23,346 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:39:23,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 150 transitions, 312 flow [2022-11-02 20:39:23,463 INFO L130 PetriNetUnfolder]: 17/174 cut-off events. [2022-11-02 20:39:23,463 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:39:23,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 174 events. 17/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 395 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 131. Up to 6 conditions per place. [2022-11-02 20:39:23,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 150 transitions, 312 flow [2022-11-02 20:39:23,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 150 transitions, 312 flow [2022-11-02 20:39:23,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:23,485 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=PETRI_NET, 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;@6cb9248a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:23,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 20:39:23,516 INFO L130 PetriNetUnfolder]: 4/82 cut-off events. [2022-11-02 20:39:23,517 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:39:23,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:23,518 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:23,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-02 20:39:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:23,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1802102159, now seen corresponding path program 1 times [2022-11-02 20:39:23,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:23,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39447987] [2022-11-02 20:39:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:23,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:23,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:39:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:23,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:39:23,628 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:39:23,629 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-02 20:39:23,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-02 20:39:23,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-02 20:39:23,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-02 20:39:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:39:23,631 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 20:39:23,633 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:39:23,635 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:39:23,763 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:39:23,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 210 transitions, 441 flow [2022-11-02 20:39:23,868 INFO L130 PetriNetUnfolder]: 25/247 cut-off events. [2022-11-02 20:39:23,868 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:39:23,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 247 events. 25/247 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 759 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 190. Up to 8 conditions per place. [2022-11-02 20:39:23,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 210 transitions, 441 flow [2022-11-02 20:39:23,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 210 transitions, 441 flow [2022-11-02 20:39:23,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:23,896 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=PETRI_NET, 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;@6cb9248a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:23,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:39:23,922 INFO L130 PetriNetUnfolder]: 6/112 cut-off events. [2022-11-02 20:39:23,922 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:39:23,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:23,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:23,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:39:23,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1564682192, now seen corresponding path program 1 times [2022-11-02 20:39:23,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800023408] [2022-11-02 20:39:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:23,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:24,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:24,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800023408] [2022-11-02 20:39:24,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800023408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:24,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:24,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:39:24,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10929185] [2022-11-02 20:39:24,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:24,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:39:24,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:39:24,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:39:24,213 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 210 [2022-11-02 20:39:24,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 210 transitions, 441 flow. Second operand has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 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) [2022-11-02 20:39:24,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:24,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 210 [2022-11-02 20:39:24,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:24,484 INFO L130 PetriNetUnfolder]: 31/461 cut-off events. [2022-11-02 20:39:24,484 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-02 20:39:24,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 461 events. 31/461 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1697 event pairs, 10 based on Foata normal form. 55/484 useless extension candidates. Maximal degree in co-relation 221. Up to 25 conditions per place. [2022-11-02 20:39:24,497 INFO L137 encePairwiseOnDemand]: 196/210 looper letters, 6 selfloop transitions, 0 changer transitions 0/188 dead transitions. [2022-11-02 20:39:24,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 188 transitions, 409 flow [2022-11-02 20:39:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:39:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:39:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 394 transitions. [2022-11-02 20:39:24,524 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9380952380952381 [2022-11-02 20:39:24,525 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 394 transitions. [2022-11-02 20:39:24,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 394 transitions. [2022-11-02 20:39:24,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:24,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 394 transitions. [2022-11-02 20:39:24,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 197.0) internal successors, (394), 2 states have internal predecessors, (394), 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) [2022-11-02 20:39:24,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 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) [2022-11-02 20:39:24,551 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 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) [2022-11-02 20:39:24,553 INFO L175 Difference]: Start difference. First operand has 195 places, 210 transitions, 441 flow. Second operand 2 states and 394 transitions. [2022-11-02 20:39:24,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 188 transitions, 409 flow [2022-11-02 20:39:24,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 188 transitions, 403 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-02 20:39:24,573 INFO L231 Difference]: Finished difference. Result has 187 places, 188 transitions, 391 flow [2022-11-02 20:39:24,576 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=391, PETRI_PLACES=187, PETRI_TRANSITIONS=188} [2022-11-02 20:39:24,584 INFO L287 CegarLoopForPetriNet]: 195 programPoint places, -8 predicate places. [2022-11-02 20:39:24,585 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 188 transitions, 391 flow [2022-11-02 20:39:24,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 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) [2022-11-02 20:39:24,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:24,587 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:24,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:39:24,588 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-02 20:39:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash -851630582, now seen corresponding path program 1 times [2022-11-02 20:39:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:24,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809208147] [2022-11-02 20:39:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:24,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:24,669 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:39:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:24,700 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:39:24,700 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:39:24,701 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-02 20:39:24,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-02 20:39:24,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-02 20:39:24,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-02 20:39:24,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-02 20:39:24,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:39:24,703 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-02 20:39:24,704 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:39:24,704 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:39:24,774 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:39:24,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 270 transitions, 572 flow [2022-11-02 20:39:24,879 INFO L130 PetriNetUnfolder]: 33/320 cut-off events. [2022-11-02 20:39:24,879 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:39:24,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 320 events. 33/320 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1111 event pairs, 0 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 255. Up to 10 conditions per place. [2022-11-02 20:39:24,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 270 transitions, 572 flow [2022-11-02 20:39:24,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 270 transitions, 572 flow [2022-11-02 20:39:24,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:24,905 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=PETRI_NET, 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;@6cb9248a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:24,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:39:24,921 INFO L130 PetriNetUnfolder]: 6/108 cut-off events. [2022-11-02 20:39:24,922 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:39:24,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:24,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:24,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:39:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:24,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1007408392, now seen corresponding path program 1 times [2022-11-02 20:39:24,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:24,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875591121] [2022-11-02 20:39:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:24,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:24,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:24,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875591121] [2022-11-02 20:39:24,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875591121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:24,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:24,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:39:24,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954710348] [2022-11-02 20:39:24,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:24,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:39:24,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:24,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:39:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:39:24,986 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 270 [2022-11-02 20:39:24,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 270 transitions, 572 flow. Second operand has 2 states, 2 states have (on average 241.0) internal successors, (482), 2 states have internal predecessors, (482), 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) [2022-11-02 20:39:24,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:24,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 270 [2022-11-02 20:39:24,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:25,367 INFO L130 PetriNetUnfolder]: 79/977 cut-off events. [2022-11-02 20:39:25,367 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-11-02 20:39:25,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 977 events. 79/977 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5341 event pairs, 34 based on Foata normal form. 151/1057 useless extension candidates. Maximal degree in co-relation 518. Up to 65 conditions per place. [2022-11-02 20:39:25,397 INFO L137 encePairwiseOnDemand]: 252/270 looper letters, 8 selfloop transitions, 0 changer transitions 0/243 dead transitions. [2022-11-02 20:39:25,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 243 transitions, 534 flow [2022-11-02 20:39:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:39:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:39:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 506 transitions. [2022-11-02 20:39:25,400 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.937037037037037 [2022-11-02 20:39:25,401 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 506 transitions. [2022-11-02 20:39:25,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 506 transitions. [2022-11-02 20:39:25,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:25,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 506 transitions. [2022-11-02 20:39:25,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 253.0) internal successors, (506), 2 states have internal predecessors, (506), 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) [2022-11-02 20:39:25,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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) [2022-11-02 20:39:25,407 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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) [2022-11-02 20:39:25,407 INFO L175 Difference]: Start difference. First operand has 250 places, 270 transitions, 572 flow. Second operand 2 states and 506 transitions. [2022-11-02 20:39:25,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 243 transitions, 534 flow [2022-11-02 20:39:25,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 243 transitions, 522 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-02 20:39:25,416 INFO L231 Difference]: Finished difference. Result has 241 places, 243 transitions, 506 flow [2022-11-02 20:39:25,416 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=506, PETRI_PLACES=241, PETRI_TRANSITIONS=243} [2022-11-02 20:39:25,418 INFO L287 CegarLoopForPetriNet]: 250 programPoint places, -9 predicate places. [2022-11-02 20:39:25,418 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 243 transitions, 506 flow [2022-11-02 20:39:25,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 241.0) internal successors, (482), 2 states have internal predecessors, (482), 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) [2022-11-02 20:39:25,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:25,419 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:25,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:39:25,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-02 20:39:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1680380666, now seen corresponding path program 1 times [2022-11-02 20:39:25,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:25,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977653012] [2022-11-02 20:39:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:25,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:25,447 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:39:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:25,473 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:39:25,473 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:39:25,474 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-02 20:39:25,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-02 20:39:25,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-02 20:39:25,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-02 20:39:25,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-02 20:39:25,475 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-02 20:39:25,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:39:25,476 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-02 20:39:25,477 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:39:25,477 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-02 20:39:25,576 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:39:25,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 330 transitions, 705 flow [2022-11-02 20:39:25,729 INFO L130 PetriNetUnfolder]: 41/393 cut-off events. [2022-11-02 20:39:25,729 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:39:25,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 393 events. 41/393 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1484 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 333. Up to 12 conditions per place. [2022-11-02 20:39:25,743 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 330 transitions, 705 flow [2022-11-02 20:39:25,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 330 transitions, 705 flow [2022-11-02 20:39:25,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:25,761 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=PETRI_NET, 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;@6cb9248a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:25,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-02 20:39:25,777 INFO L130 PetriNetUnfolder]: 7/113 cut-off events. [2022-11-02 20:39:25,777 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:39:25,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:25,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:25,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:39:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:25,779 INFO L85 PathProgramCache]: Analyzing trace with hash 837167517, now seen corresponding path program 1 times [2022-11-02 20:39:25,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:25,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526742536] [2022-11-02 20:39:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:25,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:25,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:25,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526742536] [2022-11-02 20:39:25,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526742536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:25,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:25,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:39:25,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260235305] [2022-11-02 20:39:25,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:25,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:39:25,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:25,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:39:25,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:39:25,863 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 330 [2022-11-02 20:39:25,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 330 transitions, 705 flow. Second operand has 2 states, 2 states have (on average 294.0) internal successors, (588), 2 states have internal predecessors, (588), 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) [2022-11-02 20:39:25,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:25,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 330 [2022-11-02 20:39:25,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:26,838 INFO L130 PetriNetUnfolder]: 191/2025 cut-off events. [2022-11-02 20:39:26,839 INFO L131 PetriNetUnfolder]: For 511/511 co-relation queries the response was YES. [2022-11-02 20:39:26,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 2025 events. 191/2025 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 14412 event pairs, 98 based on Foata normal form. 391/2266 useless extension candidates. Maximal degree in co-relation 1146. Up to 161 conditions per place. [2022-11-02 20:39:26,966 INFO L137 encePairwiseOnDemand]: 308/330 looper letters, 10 selfloop transitions, 0 changer transitions 0/298 dead transitions. [2022-11-02 20:39:26,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 298 transitions, 661 flow [2022-11-02 20:39:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:39:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:39:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 618 transitions. [2022-11-02 20:39:26,969 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9363636363636364 [2022-11-02 20:39:26,969 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 618 transitions. [2022-11-02 20:39:26,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 618 transitions. [2022-11-02 20:39:26,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:26,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 618 transitions. [2022-11-02 20:39:26,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 309.0) internal successors, (618), 2 states have internal predecessors, (618), 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) [2022-11-02 20:39:26,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 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) [2022-11-02 20:39:26,975 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 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) [2022-11-02 20:39:26,975 INFO L175 Difference]: Start difference. First operand has 305 places, 330 transitions, 705 flow. Second operand 2 states and 618 transitions. [2022-11-02 20:39:26,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 298 transitions, 661 flow [2022-11-02 20:39:26,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 298 transitions, 641 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-02 20:39:26,984 INFO L231 Difference]: Finished difference. Result has 295 places, 298 transitions, 621 flow [2022-11-02 20:39:26,985 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=621, PETRI_PLACES=295, PETRI_TRANSITIONS=298} [2022-11-02 20:39:26,986 INFO L287 CegarLoopForPetriNet]: 305 programPoint places, -10 predicate places. [2022-11-02 20:39:26,986 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 298 transitions, 621 flow [2022-11-02 20:39:26,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 294.0) internal successors, (588), 2 states have internal predecessors, (588), 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) [2022-11-02 20:39:26,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:26,987 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:26,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:39:26,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-02 20:39:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash -676471479, now seen corresponding path program 1 times [2022-11-02 20:39:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:26,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735927743] [2022-11-02 20:39:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:26,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:27,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:39:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:27,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:39:27,042 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:39:27,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-02 20:39:27,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-02 20:39:27,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-02 20:39:27,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-02 20:39:27,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-02 20:39:27,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-02 20:39:27,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-02 20:39:27,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:39:27,044 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-02 20:39:27,045 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:39:27,045 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-02 20:39:27,133 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:39:27,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 360 places, 390 transitions, 840 flow [2022-11-02 20:39:27,341 INFO L130 PetriNetUnfolder]: 49/466 cut-off events. [2022-11-02 20:39:27,342 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-02 20:39:27,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 466 events. 49/466 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1865 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 412. Up to 14 conditions per place. [2022-11-02 20:39:27,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 390 transitions, 840 flow [2022-11-02 20:39:27,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 390 transitions, 840 flow [2022-11-02 20:39:27,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:27,369 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=PETRI_NET, 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;@6cb9248a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:27,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-02 20:39:27,381 INFO L130 PetriNetUnfolder]: 6/106 cut-off events. [2022-11-02 20:39:27,381 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:39:27,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:27,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:27,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-02 20:39:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:27,383 INFO L85 PathProgramCache]: Analyzing trace with hash 78638174, now seen corresponding path program 1 times [2022-11-02 20:39:27,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:27,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109679675] [2022-11-02 20:39:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:27,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109679675] [2022-11-02 20:39:27,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109679675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:27,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:27,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:39:27,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146772303] [2022-11-02 20:39:27,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:39:27,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:39:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:39:27,444 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 390 [2022-11-02 20:39:27,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 390 transitions, 840 flow. Second operand has 2 states, 2 states have (on average 347.0) internal successors, (694), 2 states have internal predecessors, (694), 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) [2022-11-02 20:39:27,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:27,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 390 [2022-11-02 20:39:27,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:29,675 INFO L130 PetriNetUnfolder]: 447/4153 cut-off events. [2022-11-02 20:39:29,675 INFO L131 PetriNetUnfolder]: For 1503/1503 co-relation queries the response was YES. [2022-11-02 20:39:29,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5121 conditions, 4153 events. 447/4153 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 36037 event pairs, 258 based on Foata normal form. 967/4812 useless extension candidates. Maximal degree in co-relation 2458. Up to 385 conditions per place. [2022-11-02 20:39:29,851 INFO L137 encePairwiseOnDemand]: 364/390 looper letters, 12 selfloop transitions, 0 changer transitions 0/353 dead transitions. [2022-11-02 20:39:29,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 353 transitions, 790 flow [2022-11-02 20:39:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:39:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:39:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 730 transitions. [2022-11-02 20:39:29,854 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9358974358974359 [2022-11-02 20:39:29,854 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 730 transitions. [2022-11-02 20:39:29,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 730 transitions. [2022-11-02 20:39:29,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:29,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 730 transitions. [2022-11-02 20:39:29,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 365.0) internal successors, (730), 2 states have internal predecessors, (730), 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) [2022-11-02 20:39:29,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 390.0) internal successors, (1170), 3 states have internal predecessors, (1170), 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) [2022-11-02 20:39:29,861 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 390.0) internal successors, (1170), 3 states have internal predecessors, (1170), 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) [2022-11-02 20:39:29,861 INFO L175 Difference]: Start difference. First operand has 360 places, 390 transitions, 840 flow. Second operand 2 states and 730 transitions. [2022-11-02 20:39:29,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 353 transitions, 790 flow [2022-11-02 20:39:29,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 353 transitions, 760 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-02 20:39:29,874 INFO L231 Difference]: Finished difference. Result has 349 places, 353 transitions, 736 flow [2022-11-02 20:39:29,875 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=390, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=736, PETRI_PLACES=349, PETRI_TRANSITIONS=353} [2022-11-02 20:39:29,876 INFO L287 CegarLoopForPetriNet]: 360 programPoint places, -11 predicate places. [2022-11-02 20:39:29,876 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 353 transitions, 736 flow [2022-11-02 20:39:29,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 347.0) internal successors, (694), 2 states have internal predecessors, (694), 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) [2022-11-02 20:39:29,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:29,877 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:29,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:39:29,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-02 20:39:29,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:29,878 INFO L85 PathProgramCache]: Analyzing trace with hash -186934261, now seen corresponding path program 1 times [2022-11-02 20:39:29,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:29,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763184994] [2022-11-02 20:39:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:29,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:29,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:39:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:39:29,936 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:39:29,936 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:39:29,937 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-02 20:39:29,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-11-02 20:39:29,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-11-02 20:39:29,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-11-02 20:39:29,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-11-02 20:39:29,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-11-02 20:39:29,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-11-02 20:39:29,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-11-02 20:39:29,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:39:29,939 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-02 20:39:29,940 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:39:29,940 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-02 20:39:30,039 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:39:30,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 415 places, 450 transitions, 977 flow [2022-11-02 20:39:30,396 INFO L130 PetriNetUnfolder]: 57/539 cut-off events. [2022-11-02 20:39:30,396 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-02 20:39:30,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 539 events. 57/539 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2194 event pairs, 0 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 492. Up to 16 conditions per place. [2022-11-02 20:39:30,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 415 places, 450 transitions, 977 flow [2022-11-02 20:39:30,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 450 transitions, 977 flow [2022-11-02 20:39:30,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:30,432 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=PETRI_NET, 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;@6cb9248a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:30,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-02 20:39:30,450 INFO L130 PetriNetUnfolder]: 7/112 cut-off events. [2022-11-02 20:39:30,451 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:39:30,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:30,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:30,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-02 20:39:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1450625029, now seen corresponding path program 1 times [2022-11-02 20:39:30,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:30,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038475452] [2022-11-02 20:39:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:30,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:30,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:30,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038475452] [2022-11-02 20:39:30,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038475452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:30,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:30,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:39:30,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562037911] [2022-11-02 20:39:30,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:30,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:39:30,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:39:30,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:39:30,493 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 450 [2022-11-02 20:39:30,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 450 transitions, 977 flow. Second operand has 2 states, 2 states have (on average 400.0) internal successors, (800), 2 states have internal predecessors, (800), 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) [2022-11-02 20:39:30,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:30,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 450 [2022-11-02 20:39:30,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:35,865 INFO L130 PetriNetUnfolder]: 1023/8473 cut-off events. [2022-11-02 20:39:35,866 INFO L131 PetriNetUnfolder]: For 4159/4159 co-relation queries the response was YES. [2022-11-02 20:39:36,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10722 conditions, 8473 events. 1023/8473 cut-off events. For 4159/4159 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 86923 event pairs, 642 based on Foata normal form. 2311/10160 useless extension candidates. Maximal degree in co-relation 5194. Up to 897 conditions per place. [2022-11-02 20:39:36,409 INFO L137 encePairwiseOnDemand]: 420/450 looper letters, 14 selfloop transitions, 0 changer transitions 0/408 dead transitions. [2022-11-02 20:39:36,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 408 transitions, 921 flow [2022-11-02 20:39:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:39:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:39:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 842 transitions. [2022-11-02 20:39:36,415 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9355555555555556 [2022-11-02 20:39:36,415 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 842 transitions. [2022-11-02 20:39:36,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 842 transitions. [2022-11-02 20:39:36,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:36,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 842 transitions. [2022-11-02 20:39:36,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 421.0) internal successors, (842), 2 states have internal predecessors, (842), 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) [2022-11-02 20:39:36,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 450.0) internal successors, (1350), 3 states have internal predecessors, (1350), 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) [2022-11-02 20:39:36,424 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 450.0) internal successors, (1350), 3 states have internal predecessors, (1350), 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) [2022-11-02 20:39:36,424 INFO L175 Difference]: Start difference. First operand has 415 places, 450 transitions, 977 flow. Second operand 2 states and 842 transitions. [2022-11-02 20:39:36,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 408 transitions, 921 flow [2022-11-02 20:39:36,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 408 transitions, 879 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-02 20:39:36,442 INFO L231 Difference]: Finished difference. Result has 403 places, 408 transitions, 851 flow [2022-11-02 20:39:36,443 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=851, PETRI_PLACES=403, PETRI_TRANSITIONS=408} [2022-11-02 20:39:36,446 INFO L287 CegarLoopForPetriNet]: 415 programPoint places, -12 predicate places. [2022-11-02 20:39:36,447 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 408 transitions, 851 flow [2022-11-02 20:39:36,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 400.0) internal successors, (800), 2 states have internal predecessors, (800), 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) [2022-11-02 20:39:36,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:36,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:36,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:39:36,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-02 20:39:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2116368612, now seen corresponding path program 1 times [2022-11-02 20:39:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:36,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658413701] [2022-11-02 20:39:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:36,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:36,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:36,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658413701] [2022-11-02 20:39:36,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658413701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:36,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:36,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:39:36,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649518031] [2022-11-02 20:39:36,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:36,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:39:36,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:36,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:39:36,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:39:36,881 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 381 out of 450 [2022-11-02 20:39:36,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 408 transitions, 851 flow. Second operand has 7 states, 7 states have (on average 383.2857142857143) internal successors, (2683), 7 states have internal predecessors, (2683), 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) [2022-11-02 20:39:36,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:39:36,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 381 of 450 [2022-11-02 20:39:36,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:39:57,088 INFO L130 PetriNetUnfolder]: 10886/41805 cut-off events. [2022-11-02 20:39:57,088 INFO L131 PetriNetUnfolder]: For 4726/4726 co-relation queries the response was YES. [2022-11-02 20:39:59,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59440 conditions, 41805 events. 10886/41805 cut-off events. For 4726/4726 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 559493 event pairs, 2946 based on Foata normal form. 0/38362 useless extension candidates. Maximal degree in co-relation 59430. Up to 3963 conditions per place. [2022-11-02 20:39:59,664 INFO L137 encePairwiseOnDemand]: 441/450 looper letters, 156 selfloop transitions, 13 changer transitions 0/544 dead transitions. [2022-11-02 20:39:59,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 544 transitions, 1791 flow [2022-11-02 20:39:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:39:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 20:39:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 5124 transitions. [2022-11-02 20:39:59,676 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8758974358974358 [2022-11-02 20:39:59,899 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 5124 transitions. [2022-11-02 20:39:59,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 5124 transitions. [2022-11-02 20:39:59,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:39:59,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 5124 transitions. [2022-11-02 20:39:59,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 394.15384615384613) internal successors, (5124), 13 states have internal predecessors, (5124), 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) [2022-11-02 20:39:59,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 450.0) internal successors, (6300), 14 states have internal predecessors, (6300), 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) [2022-11-02 20:39:59,947 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 450.0) internal successors, (6300), 14 states have internal predecessors, (6300), 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) [2022-11-02 20:39:59,948 INFO L175 Difference]: Start difference. First operand has 403 places, 408 transitions, 851 flow. Second operand 13 states and 5124 transitions. [2022-11-02 20:39:59,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 544 transitions, 1791 flow [2022-11-02 20:39:59,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 544 transitions, 1791 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:39:59,963 INFO L231 Difference]: Finished difference. Result has 412 places, 410 transitions, 881 flow [2022-11-02 20:39:59,964 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=881, PETRI_PLACES=412, PETRI_TRANSITIONS=410} [2022-11-02 20:39:59,966 INFO L287 CegarLoopForPetriNet]: 415 programPoint places, -3 predicate places. [2022-11-02 20:39:59,966 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 410 transitions, 881 flow [2022-11-02 20:39:59,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 383.2857142857143) internal successors, (2683), 7 states have internal predecessors, (2683), 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) [2022-11-02 20:39:59,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:39:59,968 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:59,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:39:59,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-02 20:39:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash 940321544, now seen corresponding path program 1 times [2022-11-02 20:39:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:59,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019989055] [2022-11-02 20:39:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:59,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:00,013 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:40:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:40:00,056 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:40:00,056 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:40:00,057 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-02 20:40:00,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-11-02 20:40:00,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-11-02 20:40:00,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-11-02 20:40:00,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-11-02 20:40:00,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-11-02 20:40:00,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-11-02 20:40:00,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-11-02 20:40:00,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-11-02 20:40:00,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:40:00,059 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:40:00,061 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:40:00,061 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-02 20:40:00,163 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:40:00,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 470 places, 510 transitions, 1116 flow [2022-11-02 20:40:00,358 INFO L130 PetriNetUnfolder]: 65/612 cut-off events. [2022-11-02 20:40:00,359 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-02 20:40:00,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 612 events. 65/612 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2567 event pairs, 0 based on Foata normal form. 0/530 useless extension candidates. Maximal degree in co-relation 575. Up to 18 conditions per place. [2022-11-02 20:40:00,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 470 places, 510 transitions, 1116 flow [2022-11-02 20:40:00,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 470 places, 510 transitions, 1116 flow [2022-11-02 20:40:00,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:00,400 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=PETRI_NET, 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;@6cb9248a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:00,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-02 20:40:00,415 INFO L130 PetriNetUnfolder]: 6/112 cut-off events. [2022-11-02 20:40:00,415 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:40:00,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:00,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:00,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-02 20:40:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1804794228, now seen corresponding path program 1 times [2022-11-02 20:40:00,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:00,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142644560] [2022-11-02 20:40:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:00,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:00,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:00,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142644560] [2022-11-02 20:40:00,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142644560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:00,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:00,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:00,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308980460] [2022-11-02 20:40:00,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:00,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:40:00,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:00,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:40:00,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:40:00,461 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 452 out of 510 [2022-11-02 20:40:00,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 510 transitions, 1116 flow. Second operand has 2 states, 2 states have (on average 453.0) internal successors, (906), 2 states have internal predecessors, (906), 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) [2022-11-02 20:40:00,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:00,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 452 of 510 [2022-11-02 20:40:00,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:40:08,073 INFO L130 PetriNetUnfolder]: 2303/17241 cut-off events. [2022-11-02 20:40:08,073 INFO L131 PetriNetUnfolder]: For 11007/11007 co-relation queries the response was YES. [2022-11-02 20:40:08,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22371 conditions, 17241 events. 2303/17241 cut-off events. For 11007/11007 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 202799 event pairs, 1538 based on Foata normal form. 5383/21368 useless extension candidates. Maximal degree in co-relation 10890. Up to 2049 conditions per place. [2022-11-02 20:40:08,929 INFO L137 encePairwiseOnDemand]: 476/510 looper letters, 16 selfloop transitions, 0 changer transitions 0/463 dead transitions. [2022-11-02 20:40:08,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 463 transitions, 1054 flow [2022-11-02 20:40:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:40:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:40:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 954 transitions. [2022-11-02 20:40:08,932 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9352941176470588 [2022-11-02 20:40:08,932 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 954 transitions. [2022-11-02 20:40:08,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 954 transitions. [2022-11-02 20:40:08,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:40:08,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 954 transitions. [2022-11-02 20:40:08,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 477.0) internal successors, (954), 2 states have internal predecessors, (954), 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) [2022-11-02 20:40:08,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 510.0) internal successors, (1530), 3 states have internal predecessors, (1530), 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) [2022-11-02 20:40:08,938 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 510.0) internal successors, (1530), 3 states have internal predecessors, (1530), 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) [2022-11-02 20:40:08,938 INFO L175 Difference]: Start difference. First operand has 470 places, 510 transitions, 1116 flow. Second operand 2 states and 954 transitions. [2022-11-02 20:40:08,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 463 transitions, 1054 flow [2022-11-02 20:40:08,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 463 transitions, 998 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-02 20:40:08,965 INFO L231 Difference]: Finished difference. Result has 457 places, 463 transitions, 966 flow [2022-11-02 20:40:08,965 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=510, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=966, PETRI_PLACES=457, PETRI_TRANSITIONS=463} [2022-11-02 20:40:08,966 INFO L287 CegarLoopForPetriNet]: 470 programPoint places, -13 predicate places. [2022-11-02 20:40:08,966 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 463 transitions, 966 flow [2022-11-02 20:40:08,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 453.0) internal successors, (906), 2 states have internal predecessors, (906), 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) [2022-11-02 20:40:08,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:40:08,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:08,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:40:08,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-02 20:40:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash -879917429, now seen corresponding path program 1 times [2022-11-02 20:40:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:08,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442160201] [2022-11-02 20:40:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:08,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:09,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:09,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442160201] [2022-11-02 20:40:09,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442160201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:09,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:09,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:40:09,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121295640] [2022-11-02 20:40:09,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:09,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:40:09,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:40:09,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:40:09,215 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 434 out of 510 [2022-11-02 20:40:09,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 463 transitions, 966 flow. Second operand has 7 states, 7 states have (on average 436.2857142857143) internal successors, (3054), 7 states have internal predecessors, (3054), 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) [2022-11-02 20:40:09,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:40:09,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 434 of 510 [2022-11-02 20:40:09,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand