./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN --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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:37:15,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:37:15,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:37:15,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:37:15,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:37:15,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:37:15,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:37:15,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:37:15,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:37:15,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:37:15,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:37:15,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:37:15,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:37:15,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:37:15,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:37:15,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:37:15,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:37:15,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:37:15,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:37:15,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:37:15,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:37:15,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:37:15,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:37:15,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:37:15,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:37:15,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:37:15,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:37:15,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:37:15,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:37:15,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:37:15,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:37:15,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:37:15,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:37:15,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:37:15,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:37:15,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:37:15,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:37:15,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:37:15,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:37:15,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:37:15,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:37:15,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:37:15,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:37:15,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:37:15,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:37:15,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:37:15,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:37:15,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:37:15,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:37:15,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:37:15,867 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:37:15,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:37:15,868 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:37:15,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:37:15,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:37:15,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:37:15,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:37:15,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:37:15,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:37:15,871 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:37:15,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:37:15,872 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:37:15,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:37:15,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:37:15,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:37:15,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:37:15,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:37:15,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:37:15,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:37:15,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:37:15,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:37:15,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:37:15,876 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:37:15,876 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:37:15,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:37:15,877 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_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2022-11-20 11:37:16,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:37:16,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:37:16,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:37:16,240 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:37:16,240 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:37:16,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-11-20 11:37:19,513 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:37:19,813 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:37:19,813 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-11-20 11:37:19,839 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/data/a8f7362ae/bc433d6b868a476d9479039a4181b1a6/FLAGbeaf0412c [2022-11-20 11:37:19,861 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/data/a8f7362ae/bc433d6b868a476d9479039a4181b1a6 [2022-11-20 11:37:19,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:37:19,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:37:19,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:37:19,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:37:19,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:37:19,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:19" (1/1) ... [2022-11-20 11:37:19,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716510bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:19, skipping insertion in model container [2022-11-20 11:37:19,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:19" (1/1) ... [2022-11-20 11:37:19,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:37:19,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:37:20,305 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2022-11-20 11:37:20,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:37:20,348 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:37:20,389 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2022-11-20 11:37:20,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:37:20,444 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:37:20,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20 WrapperNode [2022-11-20 11:37:20,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:37:20,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:37:20,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:37:20,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:37:20,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,500 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-11-20 11:37:20,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:37:20,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:37:20,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:37:20,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:37:20,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,533 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:37:20,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:37:20,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:37:20,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:37:20,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (1/1) ... [2022-11-20 11:37:20,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:37:20,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:20,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:37:20,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:37:20,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:37:20,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:37:20,633 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:37:20,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:37:20,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:37:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 11:37:20,634 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 11:37:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:37:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:37:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:37:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:37:20,637 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:37:20,872 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:37:20,887 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:37:21,138 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:37:21,147 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:37:21,148 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-20 11:37:21,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:21 BoogieIcfgContainer [2022-11-20 11:37:21,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:37:21,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:37:21,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:37:21,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:37:21,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:37:19" (1/3) ... [2022-11-20 11:37:21,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b29380a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:21, skipping insertion in model container [2022-11-20 11:37:21,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:20" (2/3) ... [2022-11-20 11:37:21,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b29380a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:21, skipping insertion in model container [2022-11-20 11:37:21,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:21" (3/3) ... [2022-11-20 11:37:21,164 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2022-11-20 11:37:21,176 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:37:21,192 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:37:21,192 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:37:21,192 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:37:21,259 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:21,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 106 transitions, 217 flow [2022-11-20 11:37:21,380 INFO L130 PetriNetUnfolder]: 14/140 cut-off events. [2022-11-20 11:37:21,381 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:21,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 14/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 317 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-11-20 11:37:21,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 106 transitions, 217 flow [2022-11-20 11:37:21,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 106 transitions, 217 flow [2022-11-20 11:37:21,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:21,414 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:21,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:21,446 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:37:21,446 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:21,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:21,447 INFO L209 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] [2022-11-20 11:37:21,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1463212038, now seen corresponding path program 1 times [2022-11-20 11:37:21,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:21,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008180910] [2022-11-20 11:37:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:21,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:21,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008180910] [2022-11-20 11:37:21,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008180910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:21,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:21,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:21,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045394753] [2022-11-20 11:37:21,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:21,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:21,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 106 [2022-11-20 11:37:21,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 217 flow. Second operand has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:21,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:21,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 106 [2022-11-20 11:37:21,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:21,891 INFO L130 PetriNetUnfolder]: 0/124 cut-off events. [2022-11-20 11:37:21,892 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:37:21,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 124 events. 0/124 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 14/134 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-20 11:37:21,894 INFO L137 encePairwiseOnDemand]: 96/106 looper letters, 1 selfloop transitions, 0 changer transitions 12/95 dead transitions. [2022-11-20 11:37:21,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 197 flow [2022-11-20 11:37:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 199 transitions. [2022-11-20 11:37:21,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9386792452830188 [2022-11-20 11:37:21,911 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 199 transitions. [2022-11-20 11:37:21,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 199 transitions. [2022-11-20 11:37:21,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:21,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 199 transitions. [2022-11-20 11:37:21,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:21,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:21,926 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:21,929 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 217 flow. Second operand 2 states and 199 transitions. [2022-11-20 11:37:21,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 197 flow [2022-11-20 11:37:21,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 95 transitions, 197 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:21,938 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 171 flow [2022-11-20 11:37:21,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=171, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2022-11-20 11:37:21,945 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-11-20 11:37:21,945 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 171 flow [2022-11-20 11:37:21,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:21,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:21,946 INFO L209 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] [2022-11-20 11:37:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:37:21,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1169809031, now seen corresponding path program 1 times [2022-11-20 11:37:21,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:21,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476551331] [2022-11-20 11:37:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:21,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:22,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:22,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476551331] [2022-11-20 11:37:22,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476551331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:22,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:22,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:22,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088178226] [2022-11-20 11:37:22,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:22,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:22,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:22,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:22,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:22,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 106 [2022-11-20 11:37:22,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:22,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 106 [2022-11-20 11:37:22,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:22,323 INFO L130 PetriNetUnfolder]: 0/87 cut-off events. [2022-11-20 11:37:22,323 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:22,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 87 events. 0/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-20 11:37:22,324 INFO L137 encePairwiseOnDemand]: 103/106 looper letters, 8 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-11-20 11:37:22,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 195 flow [2022-11-20 11:37:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-11-20 11:37:22,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8553459119496856 [2022-11-20 11:37:22,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-11-20 11:37:22,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-11-20 11:37:22,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:22,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-11-20 11:37:22,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,335 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 171 flow. Second operand 3 states and 272 transitions. [2022-11-20 11:37:22,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 195 flow [2022-11-20 11:37:22,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 195 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:22,339 INFO L231 Difference]: Finished difference. Result has 90 places, 83 transitions, 179 flow [2022-11-20 11:37:22,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2022-11-20 11:37:22,340 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-11-20 11:37:22,341 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 179 flow [2022-11-20 11:37:22,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:22,342 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:22,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:37:22,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:22,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash 602894772, now seen corresponding path program 1 times [2022-11-20 11:37:22,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:22,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303181453] [2022-11-20 11:37:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:22,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:22,406 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:22,488 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:22,489 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:22,493 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:22,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:22,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:37:22,496 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 11:37:22,498 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:22,498 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 11:37:22,526 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:22,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 139 transitions, 290 flow [2022-11-20 11:37:22,574 INFO L130 PetriNetUnfolder]: 24/212 cut-off events. [2022-11-20 11:37:22,575 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:37:22,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 212 events. 24/212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 595 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-11-20 11:37:22,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 139 transitions, 290 flow [2022-11-20 11:37:22,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 139 transitions, 290 flow [2022-11-20 11:37:22,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:22,584 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:22,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:22,601 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:37:22,602 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:22,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:22,602 INFO L209 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] [2022-11-20 11:37:22,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:22,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2146504794, now seen corresponding path program 1 times [2022-11-20 11:37:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:22,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448174624] [2022-11-20 11:37:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:22,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:22,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448174624] [2022-11-20 11:37:22,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448174624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:22,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:22,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:22,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176933203] [2022-11-20 11:37:22,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:22,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:22,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:22,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:22,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 139 [2022-11-20 11:37:22,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 139 transitions, 290 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:22,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 139 [2022-11-20 11:37:22,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:22,753 INFO L130 PetriNetUnfolder]: 0/185 cut-off events. [2022-11-20 11:37:22,753 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 11:37:22,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 185 events. 0/185 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 441 event pairs, 0 based on Foata normal form. 26/205 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-11-20 11:37:22,755 INFO L137 encePairwiseOnDemand]: 123/139 looper letters, 2 selfloop transitions, 0 changer transitions 12/122 dead transitions. [2022-11-20 11:37:22,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 122 transitions, 260 flow [2022-11-20 11:37:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-11-20 11:37:22,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9280575539568345 [2022-11-20 11:37:22,759 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-11-20 11:37:22,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-11-20 11:37:22,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:22,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-11-20 11:37:22,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,764 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,765 INFO L175 Difference]: Start difference. First operand has 128 places, 139 transitions, 290 flow. Second operand 2 states and 258 transitions. [2022-11-20 11:37:22,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 122 transitions, 260 flow [2022-11-20 11:37:22,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 122 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:22,769 INFO L231 Difference]: Finished difference. Result has 128 places, 110 transitions, 230 flow [2022-11-20 11:37:22,770 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=128, PETRI_TRANSITIONS=110} [2022-11-20 11:37:22,771 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, 0 predicate places. [2022-11-20 11:37:22,771 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 110 transitions, 230 flow [2022-11-20 11:37:22,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,772 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:22,772 INFO L209 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] [2022-11-20 11:37:22,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:37:22,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1855059495, now seen corresponding path program 1 times [2022-11-20 11:37:22,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:22,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147430195] [2022-11-20 11:37:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:22,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:22,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:22,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147430195] [2022-11-20 11:37:22,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147430195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:22,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:22,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:22,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58075061] [2022-11-20 11:37:22,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:22,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:22,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:22,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 139 [2022-11-20 11:37:22,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 110 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:22,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 139 [2022-11-20 11:37:22,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:22,977 INFO L130 PetriNetUnfolder]: 0/136 cut-off events. [2022-11-20 11:37:22,978 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:37:22,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 136 events. 0/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 219 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-20 11:37:22,979 INFO L137 encePairwiseOnDemand]: 136/139 looper letters, 11 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2022-11-20 11:37:22,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 264 flow [2022-11-20 11:37:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-11-20 11:37:22,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8465227817745803 [2022-11-20 11:37:22,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-11-20 11:37:22,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-11-20 11:37:22,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:22,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-11-20 11:37:22,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:22,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,004 INFO L175 Difference]: Start difference. First operand has 128 places, 110 transitions, 230 flow. Second operand 3 states and 353 transitions. [2022-11-20 11:37:23,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 264 flow [2022-11-20 11:37:23,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 114 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:23,011 INFO L231 Difference]: Finished difference. Result has 119 places, 111 transitions, 242 flow [2022-11-20 11:37:23,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2022-11-20 11:37:23,014 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, -9 predicate places. [2022-11-20 11:37:23,015 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 242 flow [2022-11-20 11:37:23,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:23,016 INFO L209 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] [2022-11-20 11:37:23,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:37:23,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:23,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:23,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1922399296, now seen corresponding path program 1 times [2022-11-20 11:37:23,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:23,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776856612] [2022-11-20 11:37:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:23,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:23,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:23,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776856612] [2022-11-20 11:37:23,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776856612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:23,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33262338] [2022-11-20 11:37:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:23,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:23,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:23,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:23,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:37:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:23,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:23,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:23,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33262338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:23,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:23,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:23,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867456959] [2022-11-20 11:37:23,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:23,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:23,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:23,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:23,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:23,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 139 [2022-11-20 11:37:23,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:23,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 139 [2022-11-20 11:37:23,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:23,790 INFO L130 PetriNetUnfolder]: 0/110 cut-off events. [2022-11-20 11:37:23,791 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 11:37:23,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-20 11:37:23,792 INFO L137 encePairwiseOnDemand]: 134/139 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-11-20 11:37:23,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 258 flow [2022-11-20 11:37:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1026 transitions. [2022-11-20 11:37:23,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8201438848920863 [2022-11-20 11:37:23,799 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1026 transitions. [2022-11-20 11:37:23,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1026 transitions. [2022-11-20 11:37:23,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:23,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1026 transitions. [2022-11-20 11:37:23,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,810 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,811 INFO L175 Difference]: Start difference. First operand has 119 places, 111 transitions, 242 flow. Second operand 9 states and 1026 transitions. [2022-11-20 11:37:23,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 258 flow [2022-11-20 11:37:23,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:23,819 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 230 flow [2022-11-20 11:37:23,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-11-20 11:37:23,825 INFO L288 CegarLoopForPetriNet]: 128 programPoint places, -15 predicate places. [2022-11-20 11:37:23,826 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 230 flow [2022-11-20 11:37:23,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:23,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:23,829 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:23,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:24,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:37:24,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:24,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1177181810, now seen corresponding path program 1 times [2022-11-20 11:37:24,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:24,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045118266] [2022-11-20 11:37:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:24,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:24,080 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:24,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:24,118 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:24,118 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:24,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:24,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:37:24,119 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 11:37:24,120 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:24,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 11:37:24,153 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:24,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 172 transitions, 365 flow [2022-11-20 11:37:24,226 INFO L130 PetriNetUnfolder]: 34/284 cut-off events. [2022-11-20 11:37:24,227 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 11:37:24,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 284 events. 34/284 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 868 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2022-11-20 11:37:24,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 172 transitions, 365 flow [2022-11-20 11:37:24,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 172 transitions, 365 flow [2022-11-20 11:37:24,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:24,251 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:24,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:24,263 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:37:24,265 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:24,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:24,267 INFO L209 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] [2022-11-20 11:37:24,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash 277282342, now seen corresponding path program 1 times [2022-11-20 11:37:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:24,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18798138] [2022-11-20 11:37:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:24,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:24,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:24,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18798138] [2022-11-20 11:37:24,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18798138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:24,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:24,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:24,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122023365] [2022-11-20 11:37:24,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:24,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-11-20 11:37:24,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 172 transitions, 365 flow. Second operand has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:24,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-11-20 11:37:24,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:24,382 INFO L130 PetriNetUnfolder]: 0/246 cut-off events. [2022-11-20 11:37:24,382 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 11:37:24,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 246 events. 0/246 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 708 event pairs, 0 based on Foata normal form. 42/280 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-20 11:37:24,383 INFO L137 encePairwiseOnDemand]: 150/172 looper letters, 3 selfloop transitions, 0 changer transitions 12/149 dead transitions. [2022-11-20 11:37:24,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 325 flow [2022-11-20 11:37:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 317 transitions. [2022-11-20 11:37:24,385 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9215116279069767 [2022-11-20 11:37:24,385 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 317 transitions. [2022-11-20 11:37:24,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 317 transitions. [2022-11-20 11:37:24,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:24,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 317 transitions. [2022-11-20 11:37:24,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,389 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,389 INFO L175 Difference]: Start difference. First operand has 157 places, 172 transitions, 365 flow. Second operand 2 states and 317 transitions. [2022-11-20 11:37:24,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 149 transitions, 325 flow [2022-11-20 11:37:24,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 149 transitions, 319 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:24,396 INFO L231 Difference]: Finished difference. Result has 157 places, 137 transitions, 289 flow [2022-11-20 11:37:24,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=289, PETRI_PLACES=157, PETRI_TRANSITIONS=137} [2022-11-20 11:37:24,398 INFO L288 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-11-20 11:37:24,398 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 137 transitions, 289 flow [2022-11-20 11:37:24,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:24,399 INFO L209 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] [2022-11-20 11:37:24,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:37:24,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash -16120665, now seen corresponding path program 1 times [2022-11-20 11:37:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:24,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451311041] [2022-11-20 11:37:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:24,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:24,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451311041] [2022-11-20 11:37:24,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451311041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:24,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:24,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:24,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104480564] [2022-11-20 11:37:24,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:24,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:24,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:24,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:24,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:24,498 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 172 [2022-11-20 11:37:24,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 137 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:24,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 172 [2022-11-20 11:37:24,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:24,565 INFO L130 PetriNetUnfolder]: 0/185 cut-off events. [2022-11-20 11:37:24,565 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:37:24,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 185 events. 0/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 404 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-20 11:37:24,566 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 12 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2022-11-20 11:37:24,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 141 transitions, 325 flow [2022-11-20 11:37:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2022-11-20 11:37:24,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8372093023255814 [2022-11-20 11:37:24,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2022-11-20 11:37:24,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2022-11-20 11:37:24,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:24,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2022-11-20 11:37:24,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,574 INFO L175 Difference]: Start difference. First operand has 157 places, 137 transitions, 289 flow. Second operand 3 states and 432 transitions. [2022-11-20 11:37:24,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 141 transitions, 325 flow [2022-11-20 11:37:24,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:24,578 INFO L231 Difference]: Finished difference. Result has 148 places, 138 transitions, 301 flow [2022-11-20 11:37:24,603 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=148, PETRI_TRANSITIONS=138} [2022-11-20 11:37:24,605 INFO L288 CegarLoopForPetriNet]: 157 programPoint places, -9 predicate places. [2022-11-20 11:37:24,605 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 138 transitions, 301 flow [2022-11-20 11:37:24,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:24,606 INFO L209 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] [2022-11-20 11:37:24,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:37:24,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1156559264, now seen corresponding path program 1 times [2022-11-20 11:37:24,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:24,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681347650] [2022-11-20 11:37:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:24,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:24,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:24,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681347650] [2022-11-20 11:37:24,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681347650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:24,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118470987] [2022-11-20 11:37:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:24,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:24,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:24,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:24,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:37:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:24,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:24,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:24,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118470987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:24,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:24,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980147018] [2022-11-20 11:37:24,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:24,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:24,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:24,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 172 [2022-11-20 11:37:24,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 138 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:24,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:24,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 172 [2022-11-20 11:37:24,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:25,091 INFO L130 PetriNetUnfolder]: 0/159 cut-off events. [2022-11-20 11:37:25,091 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 11:37:25,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 159 events. 0/159 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 247 event pairs, 0 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-20 11:37:25,094 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 13 selfloop transitions, 9 changer transitions 0/148 dead transitions. [2022-11-20 11:37:25,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 148 transitions, 367 flow [2022-11-20 11:37:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1266 transitions. [2022-11-20 11:37:25,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8178294573643411 [2022-11-20 11:37:25,100 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1266 transitions. [2022-11-20 11:37:25,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1266 transitions. [2022-11-20 11:37:25,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:25,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1266 transitions. [2022-11-20 11:37:25,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,109 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,110 INFO L175 Difference]: Start difference. First operand has 148 places, 138 transitions, 301 flow. Second operand 9 states and 1266 transitions. [2022-11-20 11:37:25,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 148 transitions, 367 flow [2022-11-20 11:37:25,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 148 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:25,114 INFO L231 Difference]: Finished difference. Result has 158 places, 144 transitions, 349 flow [2022-11-20 11:37:25,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=349, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2022-11-20 11:37:25,116 INFO L288 CegarLoopForPetriNet]: 157 programPoint places, 1 predicate places. [2022-11-20 11:37:25,117 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 349 flow [2022-11-20 11:37:25,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:25,118 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:25,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:25,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:25,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1450639895, now seen corresponding path program 1 times [2022-11-20 11:37:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:25,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522102604] [2022-11-20 11:37:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:25,351 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:25,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:25,389 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:25,390 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:25,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:25,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:37:25,390 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 11:37:25,391 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:25,391 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 11:37:25,419 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:25,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 205 transitions, 442 flow [2022-11-20 11:37:25,477 INFO L130 PetriNetUnfolder]: 44/356 cut-off events. [2022-11-20 11:37:25,478 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 11:37:25,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 356 events. 44/356 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1150 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 292. Up to 10 conditions per place. [2022-11-20 11:37:25,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 205 transitions, 442 flow [2022-11-20 11:37:25,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 205 transitions, 442 flow [2022-11-20 11:37:25,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:25,489 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:25,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:25,497 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:37:25,497 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:25,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:25,498 INFO L209 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] [2022-11-20 11:37:25,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:25,498 INFO L85 PathProgramCache]: Analyzing trace with hash 144638854, now seen corresponding path program 1 times [2022-11-20 11:37:25,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:25,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160441298] [2022-11-20 11:37:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:25,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:25,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:25,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160441298] [2022-11-20 11:37:25,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160441298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:25,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:25,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:25,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836739393] [2022-11-20 11:37:25,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:25,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:25,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:25,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 205 [2022-11-20 11:37:25,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:25,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 205 [2022-11-20 11:37:25,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:25,651 INFO L130 PetriNetUnfolder]: 0/307 cut-off events. [2022-11-20 11:37:25,652 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-20 11:37:25,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 307 events. 0/307 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 979 event pairs, 0 based on Foata normal form. 64/361 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2022-11-20 11:37:25,653 INFO L137 encePairwiseOnDemand]: 177/205 looper letters, 4 selfloop transitions, 0 changer transitions 12/176 dead transitions. [2022-11-20 11:37:25,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 392 flow [2022-11-20 11:37:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 376 transitions. [2022-11-20 11:37:25,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9170731707317074 [2022-11-20 11:37:25,655 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 376 transitions. [2022-11-20 11:37:25,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 376 transitions. [2022-11-20 11:37:25,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:25,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 376 transitions. [2022-11-20 11:37:25,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 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) [2022-11-20 11:37:25,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,659 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,659 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 442 flow. Second operand 2 states and 376 transitions. [2022-11-20 11:37:25,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 392 flow [2022-11-20 11:37:25,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 176 transitions, 380 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:25,664 INFO L231 Difference]: Finished difference. Result has 186 places, 164 transitions, 348 flow [2022-11-20 11:37:25,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=348, PETRI_PLACES=186, PETRI_TRANSITIONS=164} [2022-11-20 11:37:25,665 INFO L288 CegarLoopForPetriNet]: 186 programPoint places, 0 predicate places. [2022-11-20 11:37:25,665 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 164 transitions, 348 flow [2022-11-20 11:37:25,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:25,666 INFO L209 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] [2022-11-20 11:37:25,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:37:25,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:25,667 INFO L85 PathProgramCache]: Analyzing trace with hash -148764153, now seen corresponding path program 1 times [2022-11-20 11:37:25,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:25,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934468707] [2022-11-20 11:37:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:25,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:25,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934468707] [2022-11-20 11:37:25,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934468707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:25,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:25,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:25,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878313524] [2022-11-20 11:37:25,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:25,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:25,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:25,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:25,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 205 [2022-11-20 11:37:25,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 164 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:25,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 205 [2022-11-20 11:37:25,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:25,801 INFO L130 PetriNetUnfolder]: 0/234 cut-off events. [2022-11-20 11:37:25,801 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:37:25,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 234 events. 0/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 587 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-20 11:37:25,802 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 13 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-11-20 11:37:25,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 168 transitions, 386 flow [2022-11-20 11:37:25,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2022-11-20 11:37:25,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8308943089430895 [2022-11-20 11:37:25,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2022-11-20 11:37:25,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2022-11-20 11:37:25,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:25,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2022-11-20 11:37:25,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,809 INFO L175 Difference]: Start difference. First operand has 186 places, 164 transitions, 348 flow. Second operand 3 states and 511 transitions. [2022-11-20 11:37:25,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 168 transitions, 386 flow [2022-11-20 11:37:25,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 168 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:25,812 INFO L231 Difference]: Finished difference. Result has 177 places, 165 transitions, 360 flow [2022-11-20 11:37:25,813 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=177, PETRI_TRANSITIONS=165} [2022-11-20 11:37:25,813 INFO L288 CegarLoopForPetriNet]: 186 programPoint places, -9 predicate places. [2022-11-20 11:37:25,814 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 165 transitions, 360 flow [2022-11-20 11:37:25,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:25,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:25,814 INFO L209 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] [2022-11-20 11:37:25,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:37:25,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash -965032960, now seen corresponding path program 1 times [2022-11-20 11:37:25,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:25,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107098953] [2022-11-20 11:37:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:25,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:25,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107098953] [2022-11-20 11:37:25,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107098953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832442030] [2022-11-20 11:37:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:25,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:25,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:25,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:25,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:37:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:26,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:26,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:26,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832442030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:26,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:26,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214798465] [2022-11-20 11:37:26,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:26,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:26,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:26,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-11-20 11:37:26,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 165 transitions, 360 flow. Second operand has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:26,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:26,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-11-20 11:37:26,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:26,266 INFO L130 PetriNetUnfolder]: 0/208 cut-off events. [2022-11-20 11:37:26,266 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:37:26,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 208 events. 0/208 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-20 11:37:26,267 INFO L137 encePairwiseOnDemand]: 199/205 looper letters, 14 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-11-20 11:37:26,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 428 flow [2022-11-20 11:37:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-11-20 11:37:26,272 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.813550135501355 [2022-11-20 11:37:26,273 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-11-20 11:37:26,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-11-20 11:37:26,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:26,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-11-20 11:37:26,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:26,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:26,284 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:26,284 INFO L175 Difference]: Start difference. First operand has 177 places, 165 transitions, 360 flow. Second operand 9 states and 1501 transitions. [2022-11-20 11:37:26,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 428 flow [2022-11-20 11:37:26,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 175 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:26,289 INFO L231 Difference]: Finished difference. Result has 187 places, 171 transitions, 408 flow [2022-11-20 11:37:26,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2022-11-20 11:37:26,291 INFO L288 CegarLoopForPetriNet]: 186 programPoint places, 1 predicate places. [2022-11-20 11:37:26,291 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 408 flow [2022-11-20 11:37:26,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:26,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:26,292 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:26,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 11:37:26,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:37:26,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:26,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1583364555, now seen corresponding path program 1 times [2022-11-20 11:37:26,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:26,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675537277] [2022-11-20 11:37:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:26,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:26,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:26,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675537277] [2022-11-20 11:37:26,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675537277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:26,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985343526] [2022-11-20 11:37:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:26,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:26,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:26,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:26,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:37:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:26,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:37:26,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:26,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985343526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:27,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:27,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:37:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103343275] [2022-11-20 11:37:27,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:27,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:27,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:27,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:27,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-11-20 11:37:27,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 408 flow. Second operand has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:27,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-11-20 11:37:27,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:27,346 INFO L130 PetriNetUnfolder]: 0/182 cut-off events. [2022-11-20 11:37:27,346 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 11:37:27,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-20 11:37:27,348 INFO L137 encePairwiseOnDemand]: 200/205 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-11-20 11:37:27,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-11-20 11:37:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:37:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-20 11:37:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2490 transitions. [2022-11-20 11:37:27,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8097560975609757 [2022-11-20 11:37:27,356 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2490 transitions. [2022-11-20 11:37:27,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2490 transitions. [2022-11-20 11:37:27,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:27,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2490 transitions. [2022-11-20 11:37:27,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.0) internal successors, (2490), 15 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,373 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,374 INFO L175 Difference]: Start difference. First operand has 187 places, 171 transitions, 408 flow. Second operand 15 states and 2490 transitions. [2022-11-20 11:37:27,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-11-20 11:37:27,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-20 11:37:27,380 INFO L231 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-11-20 11:37:27,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2022-11-20 11:37:27,381 INFO L288 CegarLoopForPetriNet]: 186 programPoint places, -2 predicate places. [2022-11-20 11:37:27,381 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-11-20 11:37:27,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:27,383 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:27,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:27,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:37:27,596 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:27,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1301575835, now seen corresponding path program 1 times [2022-11-20 11:37:27,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:27,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760742523] [2022-11-20 11:37:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:27,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:27,620 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:27,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:27,645 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:27,645 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:27,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:27,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:37:27,646 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 11:37:27,647 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:27,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 11:37:27,678 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:27,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 238 transitions, 521 flow [2022-11-20 11:37:27,755 INFO L130 PetriNetUnfolder]: 54/428 cut-off events. [2022-11-20 11:37:27,755 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 11:37:27,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 428 events. 54/428 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1433 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 369. Up to 12 conditions per place. [2022-11-20 11:37:27,762 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 238 transitions, 521 flow [2022-11-20 11:37:27,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 238 transitions, 521 flow [2022-11-20 11:37:27,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:27,768 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:27,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:27,775 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:37:27,775 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:27,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:27,776 INFO L209 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] [2022-11-20 11:37:27,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:27,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1750532038, now seen corresponding path program 1 times [2022-11-20 11:37:27,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:27,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6637574] [2022-11-20 11:37:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:27,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:27,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:27,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6637574] [2022-11-20 11:37:27,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6637574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:27,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:27,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:27,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195045039] [2022-11-20 11:37:27,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:27,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:27,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:27,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:27,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 238 [2022-11-20 11:37:27,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 521 flow. Second operand has 2 states, 2 states have (on average 198.5) internal successors, (397), 2 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:27,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 238 [2022-11-20 11:37:27,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:27,896 INFO L130 PetriNetUnfolder]: 0/368 cut-off events. [2022-11-20 11:37:27,896 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-20 11:37:27,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 368 events. 0/368 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1247 event pairs, 0 based on Foata normal form. 92/448 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-20 11:37:27,897 INFO L137 encePairwiseOnDemand]: 204/238 looper letters, 5 selfloop transitions, 0 changer transitions 12/203 dead transitions. [2022-11-20 11:37:27,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 203 transitions, 461 flow [2022-11-20 11:37:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 435 transitions. [2022-11-20 11:37:27,899 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9138655462184874 [2022-11-20 11:37:27,899 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 435 transitions. [2022-11-20 11:37:27,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 435 transitions. [2022-11-20 11:37:27,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:27,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 435 transitions. [2022-11-20 11:37:27,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,902 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,902 INFO L175 Difference]: Start difference. First operand has 215 places, 238 transitions, 521 flow. Second operand 2 states and 435 transitions. [2022-11-20 11:37:27,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 203 transitions, 461 flow [2022-11-20 11:37:27,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 203 transitions, 441 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:27,906 INFO L231 Difference]: Finished difference. Result has 215 places, 191 transitions, 407 flow [2022-11-20 11:37:27,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=407, PETRI_PLACES=215, PETRI_TRANSITIONS=191} [2022-11-20 11:37:27,907 INFO L288 CegarLoopForPetriNet]: 215 programPoint places, 0 predicate places. [2022-11-20 11:37:27,908 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 191 transitions, 407 flow [2022-11-20 11:37:27,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 198.5) internal successors, (397), 2 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:27,908 INFO L209 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] [2022-11-20 11:37:27,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:37:27,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1457129031, now seen corresponding path program 1 times [2022-11-20 11:37:27,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:27,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439918499] [2022-11-20 11:37:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:27,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:27,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439918499] [2022-11-20 11:37:27,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439918499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:27,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:27,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:27,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039467907] [2022-11-20 11:37:27,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:27,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:27,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:27,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:27,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:27,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 238 [2022-11-20 11:37:27,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 191 transitions, 407 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:27,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:27,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 238 [2022-11-20 11:37:27,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:28,034 INFO L130 PetriNetUnfolder]: 0/283 cut-off events. [2022-11-20 11:37:28,035 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 11:37:28,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 283 events. 0/283 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 770 event pairs, 0 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-20 11:37:28,036 INFO L137 encePairwiseOnDemand]: 235/238 looper letters, 14 selfloop transitions, 2 changer transitions 0/195 dead transitions. [2022-11-20 11:37:28,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 195 transitions, 447 flow [2022-11-20 11:37:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2022-11-20 11:37:28,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8263305322128851 [2022-11-20 11:37:28,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2022-11-20 11:37:28,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2022-11-20 11:37:28,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:28,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2022-11-20 11:37:28,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:28,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:28,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:28,043 INFO L175 Difference]: Start difference. First operand has 215 places, 191 transitions, 407 flow. Second operand 3 states and 590 transitions. [2022-11-20 11:37:28,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 195 transitions, 447 flow [2022-11-20 11:37:28,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 195 transitions, 447 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:28,048 INFO L231 Difference]: Finished difference. Result has 206 places, 192 transitions, 419 flow [2022-11-20 11:37:28,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=206, PETRI_TRANSITIONS=192} [2022-11-20 11:37:28,048 INFO L288 CegarLoopForPetriNet]: 215 programPoint places, -9 predicate places. [2022-11-20 11:37:28,049 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 192 transitions, 419 flow [2022-11-20 11:37:28,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:28,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:28,049 INFO L209 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] [2022-11-20 11:37:28,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:37:28,050 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1797989088, now seen corresponding path program 1 times [2022-11-20 11:37:28,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:28,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563244354] [2022-11-20 11:37:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:28,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:28,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:28,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563244354] [2022-11-20 11:37:28,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563244354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:28,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161931895] [2022-11-20 11:37:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:28,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:28,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:28,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:28,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:37:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:28,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:28,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:28,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161931895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:28,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:28,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711001195] [2022-11-20 11:37:28,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:28,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:28,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-11-20 11:37:28,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 192 transitions, 419 flow. Second operand has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:28,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:28,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-11-20 11:37:28,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:28,490 INFO L130 PetriNetUnfolder]: 0/257 cut-off events. [2022-11-20 11:37:28,491 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 11:37:28,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 257 events. 0/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 613 event pairs, 0 based on Foata normal form. 2/259 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 11:37:28,492 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 15 selfloop transitions, 9 changer transitions 0/202 dead transitions. [2022-11-20 11:37:28,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 202 transitions, 489 flow [2022-11-20 11:37:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1736 transitions. [2022-11-20 11:37:28,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8104575163398693 [2022-11-20 11:37:28,498 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1736 transitions. [2022-11-20 11:37:28,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1736 transitions. [2022-11-20 11:37:28,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:28,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1736 transitions. [2022-11-20 11:37:28,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.88888888888889) internal successors, (1736), 9 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:28,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:28,528 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:28,528 INFO L175 Difference]: Start difference. First operand has 206 places, 192 transitions, 419 flow. Second operand 9 states and 1736 transitions. [2022-11-20 11:37:28,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 202 transitions, 489 flow [2022-11-20 11:37:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 202 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:28,533 INFO L231 Difference]: Finished difference. Result has 216 places, 198 transitions, 467 flow [2022-11-20 11:37:28,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=467, PETRI_PLACES=216, PETRI_TRANSITIONS=198} [2022-11-20 11:37:28,535 INFO L288 CegarLoopForPetriNet]: 215 programPoint places, 1 predicate places. [2022-11-20 11:37:28,535 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 198 transitions, 467 flow [2022-11-20 11:37:28,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:28,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:28,536 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:28,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:28,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:28,742 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1377325333, now seen corresponding path program 1 times [2022-11-20 11:37:28,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:28,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22857171] [2022-11-20 11:37:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:28,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:28,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:28,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22857171] [2022-11-20 11:37:28,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22857171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:28,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038008172] [2022-11-20 11:37:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:28,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:28,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:28,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:28,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:37:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:29,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:37:29,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:29,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:29,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038008172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:29,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:29,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:37:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994077142] [2022-11-20 11:37:29,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:29,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-11-20 11:37:29,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 198 transitions, 467 flow. Second operand has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:29,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:29,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-11-20 11:37:29,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:29,641 INFO L130 PetriNetUnfolder]: 0/218 cut-off events. [2022-11-20 11:37:29,642 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-20 11:37:29,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-20 11:37:29,643 INFO L137 encePairwiseOnDemand]: 233/238 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-11-20 11:37:29,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 200 transitions, 565 flow [2022-11-20 11:37:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:37:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:37:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3457 transitions. [2022-11-20 11:37:29,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8069561157796452 [2022-11-20 11:37:29,651 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3457 transitions. [2022-11-20 11:37:29,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3457 transitions. [2022-11-20 11:37:29,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:29,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3457 transitions. [2022-11-20 11:37:29,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 192.05555555555554) internal successors, (3457), 18 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:29,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:29,671 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:29,671 INFO L175 Difference]: Start difference. First operand has 216 places, 198 transitions, 467 flow. Second operand 18 states and 3457 transitions. [2022-11-20 11:37:29,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 200 transitions, 565 flow [2022-11-20 11:37:29,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-20 11:37:29,678 INFO L231 Difference]: Finished difference. Result has 216 places, 191 transitions, 480 flow [2022-11-20 11:37:29,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=216, PETRI_TRANSITIONS=191} [2022-11-20 11:37:29,679 INFO L288 CegarLoopForPetriNet]: 215 programPoint places, 1 predicate places. [2022-11-20 11:37:29,680 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 191 transitions, 480 flow [2022-11-20 11:37:29,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:29,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:29,682 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:29,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:29,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:29,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:29,889 INFO L85 PathProgramCache]: Analyzing trace with hash -544530782, now seen corresponding path program 1 times [2022-11-20 11:37:29,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:29,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868637509] [2022-11-20 11:37:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:29,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:29,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:29,929 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:29,930 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:29,930 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:29,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:29,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 11:37:29,930 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 11:37:29,931 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:29,931 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-20 11:37:29,967 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:29,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 271 transitions, 602 flow [2022-11-20 11:37:30,084 INFO L130 PetriNetUnfolder]: 64/500 cut-off events. [2022-11-20 11:37:30,084 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-20 11:37:30,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 500 events. 64/500 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1716 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 447. Up to 14 conditions per place. [2022-11-20 11:37:30,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 271 transitions, 602 flow [2022-11-20 11:37:30,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 271 transitions, 602 flow [2022-11-20 11:37:30,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:30,100 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:30,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:30,112 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:37:30,112 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:30,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:30,112 INFO L209 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] [2022-11-20 11:37:30,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash 799994598, now seen corresponding path program 1 times [2022-11-20 11:37:30,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:30,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639936476] [2022-11-20 11:37:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:30,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639936476] [2022-11-20 11:37:30,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639936476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:30,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:30,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:30,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156243745] [2022-11-20 11:37:30,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:30,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:30,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:30,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:30,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:30,139 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 271 [2022-11-20 11:37:30,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 271 transitions, 602 flow. Second operand has 2 states, 2 states have (on average 224.5) internal successors, (449), 2 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:30,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 271 [2022-11-20 11:37:30,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:30,257 INFO L130 PetriNetUnfolder]: 0/429 cut-off events. [2022-11-20 11:37:30,258 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-20 11:37:30,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 429 events. 0/429 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1516 event pairs, 0 based on Foata normal form. 126/541 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-20 11:37:30,259 INFO L137 encePairwiseOnDemand]: 231/271 looper letters, 6 selfloop transitions, 0 changer transitions 12/230 dead transitions. [2022-11-20 11:37:30,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 230 transitions, 532 flow [2022-11-20 11:37:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 494 transitions. [2022-11-20 11:37:30,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9114391143911439 [2022-11-20 11:37:30,261 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 494 transitions. [2022-11-20 11:37:30,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 494 transitions. [2022-11-20 11:37:30,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:30,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 494 transitions. [2022-11-20 11:37:30,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 247.0) internal successors, (494), 2 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,265 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,265 INFO L175 Difference]: Start difference. First operand has 244 places, 271 transitions, 602 flow. Second operand 2 states and 494 transitions. [2022-11-20 11:37:30,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 230 transitions, 532 flow [2022-11-20 11:37:30,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 230 transitions, 502 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:30,270 INFO L231 Difference]: Finished difference. Result has 244 places, 218 transitions, 466 flow [2022-11-20 11:37:30,270 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=466, PETRI_PLACES=244, PETRI_TRANSITIONS=218} [2022-11-20 11:37:30,271 INFO L288 CegarLoopForPetriNet]: 244 programPoint places, 0 predicate places. [2022-11-20 11:37:30,271 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 218 transitions, 466 flow [2022-11-20 11:37:30,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.5) internal successors, (449), 2 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:30,271 INFO L209 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] [2022-11-20 11:37:30,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 11:37:30,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash 506591591, now seen corresponding path program 1 times [2022-11-20 11:37:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:30,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407083660] [2022-11-20 11:37:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:30,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407083660] [2022-11-20 11:37:30,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407083660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:30,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:30,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:30,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298748546] [2022-11-20 11:37:30,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:30,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:30,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 271 [2022-11-20 11:37:30,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 218 transitions, 466 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:30,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 271 [2022-11-20 11:37:30,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:30,404 INFO L130 PetriNetUnfolder]: 0/332 cut-off events. [2022-11-20 11:37:30,404 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 11:37:30,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 332 events. 0/332 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 953 event pairs, 0 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-20 11:37:30,406 INFO L137 encePairwiseOnDemand]: 268/271 looper letters, 15 selfloop transitions, 2 changer transitions 0/222 dead transitions. [2022-11-20 11:37:30,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 222 transitions, 508 flow [2022-11-20 11:37:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2022-11-20 11:37:30,408 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8228782287822878 [2022-11-20 11:37:30,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2022-11-20 11:37:30,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2022-11-20 11:37:30,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:30,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2022-11-20 11:37:30,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,413 INFO L175 Difference]: Start difference. First operand has 244 places, 218 transitions, 466 flow. Second operand 3 states and 669 transitions. [2022-11-20 11:37:30,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 222 transitions, 508 flow [2022-11-20 11:37:30,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 222 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:30,418 INFO L231 Difference]: Finished difference. Result has 235 places, 219 transitions, 478 flow [2022-11-20 11:37:30,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=478, PETRI_PLACES=235, PETRI_TRANSITIONS=219} [2022-11-20 11:37:30,419 INFO L288 CegarLoopForPetriNet]: 244 programPoint places, -9 predicate places. [2022-11-20 11:37:30,419 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 219 transitions, 478 flow [2022-11-20 11:37:30,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:30,420 INFO L209 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] [2022-11-20 11:37:30,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 11:37:30,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash 639539648, now seen corresponding path program 1 times [2022-11-20 11:37:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:30,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356542131] [2022-11-20 11:37:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:30,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:30,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:30,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356542131] [2022-11-20 11:37:30,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356542131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047891017] [2022-11-20 11:37:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:30,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:30,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:30,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:30,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:37:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:30,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:30,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:30,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047891017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:30,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:30,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:30,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543997402] [2022-11-20 11:37:30,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:30,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:30,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:30,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-11-20 11:37:30,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 219 transitions, 478 flow. Second operand has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:30,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-11-20 11:37:30,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:30,895 INFO L130 PetriNetUnfolder]: 0/306 cut-off events. [2022-11-20 11:37:30,896 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 11:37:30,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 306 events. 0/306 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 798 event pairs, 0 based on Foata normal form. 2/308 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-20 11:37:30,897 INFO L137 encePairwiseOnDemand]: 265/271 looper letters, 16 selfloop transitions, 9 changer transitions 0/229 dead transitions. [2022-11-20 11:37:30,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 229 transitions, 550 flow [2022-11-20 11:37:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1971 transitions. [2022-11-20 11:37:30,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8081180811808119 [2022-11-20 11:37:30,902 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1971 transitions. [2022-11-20 11:37:30,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1971 transitions. [2022-11-20 11:37:30,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:30,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1971 transitions. [2022-11-20 11:37:30,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,911 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,912 INFO L175 Difference]: Start difference. First operand has 235 places, 219 transitions, 478 flow. Second operand 9 states and 1971 transitions. [2022-11-20 11:37:30,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 229 transitions, 550 flow [2022-11-20 11:37:30,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 229 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:30,917 INFO L231 Difference]: Finished difference. Result has 245 places, 225 transitions, 526 flow [2022-11-20 11:37:30,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=245, PETRI_TRANSITIONS=225} [2022-11-20 11:37:30,918 INFO L288 CegarLoopForPetriNet]: 244 programPoint places, 1 predicate places. [2022-11-20 11:37:30,918 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 225 transitions, 526 flow [2022-11-20 11:37:30,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:30,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:30,919 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:30,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:31,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:31,125 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:31,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2089549643, now seen corresponding path program 1 times [2022-11-20 11:37:31,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:31,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487560610] [2022-11-20 11:37:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:31,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:31,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:31,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487560610] [2022-11-20 11:37:31,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487560610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:31,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269220561] [2022-11-20 11:37:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:31,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:31,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:31,271 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:31,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:37:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:31,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:37:31,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:31,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:31,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269220561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:31,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:31,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:37:31,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858946171] [2022-11-20 11:37:31,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:31,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:31,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:31,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-11-20 11:37:31,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 225 transitions, 526 flow. Second operand has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:31,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:31,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-11-20 11:37:31,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:31,876 INFO L130 PetriNetUnfolder]: 0/254 cut-off events. [2022-11-20 11:37:31,876 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 11:37:31,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-20 11:37:31,878 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-11-20 11:37:31,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 232 transitions, 660 flow [2022-11-20 11:37:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:37:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:37:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4580 transitions. [2022-11-20 11:37:31,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8047794763661922 [2022-11-20 11:37:31,884 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4580 transitions. [2022-11-20 11:37:31,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4580 transitions. [2022-11-20 11:37:31,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:31,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4580 transitions. [2022-11-20 11:37:31,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 218.0952380952381) internal successors, (4580), 21 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:31,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:31,905 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:31,905 INFO L175 Difference]: Start difference. First operand has 245 places, 225 transitions, 526 flow. Second operand 21 states and 4580 transitions. [2022-11-20 11:37:31,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 232 transitions, 660 flow [2022-11-20 11:37:31,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-20 11:37:31,911 INFO L231 Difference]: Finished difference. Result has 248 places, 221 transitions, 558 flow [2022-11-20 11:37:31,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=248, PETRI_TRANSITIONS=221} [2022-11-20 11:37:31,912 INFO L288 CegarLoopForPetriNet]: 244 programPoint places, 4 predicate places. [2022-11-20 11:37:31,912 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 221 transitions, 558 flow [2022-11-20 11:37:31,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:31,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:31,914 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:31,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:32,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 11:37:32,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:32,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1513194560, now seen corresponding path program 1 times [2022-11-20 11:37:32,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:32,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970049376] [2022-11-20 11:37:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:32,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:32,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:32,165 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:32,166 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:32,166 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:32,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:32,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 11:37:32,167 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 11:37:32,167 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:32,167 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-20 11:37:32,199 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:32,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 304 transitions, 685 flow [2022-11-20 11:37:32,322 INFO L130 PetriNetUnfolder]: 74/572 cut-off events. [2022-11-20 11:37:32,323 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-20 11:37:32,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 572 events. 74/572 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2001 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 526. Up to 16 conditions per place. [2022-11-20 11:37:32,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 304 transitions, 685 flow [2022-11-20 11:37:32,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 304 transitions, 685 flow [2022-11-20 11:37:32,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:32,344 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:32,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:32,355 INFO L130 PetriNetUnfolder]: 4/88 cut-off events. [2022-11-20 11:37:32,356 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:32,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:32,356 INFO L209 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] [2022-11-20 11:37:32,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:32,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1587993830, now seen corresponding path program 1 times [2022-11-20 11:37:32,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:32,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649280696] [2022-11-20 11:37:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:32,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:32,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:32,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649280696] [2022-11-20 11:37:32,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649280696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:32,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:32,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:32,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925583092] [2022-11-20 11:37:32,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:32,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:32,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:32,381 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 304 [2022-11-20 11:37:32,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 304 transitions, 685 flow. Second operand has 2 states, 2 states have (on average 250.5) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:32,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 304 [2022-11-20 11:37:32,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:32,503 INFO L130 PetriNetUnfolder]: 0/490 cut-off events. [2022-11-20 11:37:32,503 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-20 11:37:32,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 490 events. 0/490 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1786 event pairs, 0 based on Foata normal form. 166/640 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-11-20 11:37:32,505 INFO L137 encePairwiseOnDemand]: 258/304 looper letters, 7 selfloop transitions, 0 changer transitions 12/257 dead transitions. [2022-11-20 11:37:32,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 257 transitions, 605 flow [2022-11-20 11:37:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 553 transitions. [2022-11-20 11:37:32,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9095394736842105 [2022-11-20 11:37:32,507 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 553 transitions. [2022-11-20 11:37:32,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 553 transitions. [2022-11-20 11:37:32,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:32,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 553 transitions. [2022-11-20 11:37:32,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,510 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,510 INFO L175 Difference]: Start difference. First operand has 273 places, 304 transitions, 685 flow. Second operand 2 states and 553 transitions. [2022-11-20 11:37:32,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 257 transitions, 605 flow [2022-11-20 11:37:32,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 257 transitions, 563 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:32,516 INFO L231 Difference]: Finished difference. Result has 273 places, 245 transitions, 525 flow [2022-11-20 11:37:32,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=525, PETRI_PLACES=273, PETRI_TRANSITIONS=245} [2022-11-20 11:37:32,517 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 0 predicate places. [2022-11-20 11:37:32,517 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 245 transitions, 525 flow [2022-11-20 11:37:32,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 250.5) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,518 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:32,518 INFO L209 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] [2022-11-20 11:37:32,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 11:37:32,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:32,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1294590823, now seen corresponding path program 1 times [2022-11-20 11:37:32,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:32,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973832665] [2022-11-20 11:37:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:32,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:32,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973832665] [2022-11-20 11:37:32,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973832665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:32,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:32,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:32,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732538740] [2022-11-20 11:37:32,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:32,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:32,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:32,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:32,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 304 [2022-11-20 11:37:32,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 245 transitions, 525 flow. Second operand has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:32,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 304 [2022-11-20 11:37:32,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:32,680 INFO L130 PetriNetUnfolder]: 0/381 cut-off events. [2022-11-20 11:37:32,680 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:37:32,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 381 events. 0/381 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1136 event pairs, 0 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-20 11:37:32,681 INFO L137 encePairwiseOnDemand]: 301/304 looper letters, 16 selfloop transitions, 2 changer transitions 0/249 dead transitions. [2022-11-20 11:37:32,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 249 transitions, 569 flow [2022-11-20 11:37:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2022-11-20 11:37:32,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8201754385964912 [2022-11-20 11:37:32,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2022-11-20 11:37:32,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2022-11-20 11:37:32,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:32,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2022-11-20 11:37:32,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,687 INFO L175 Difference]: Start difference. First operand has 273 places, 245 transitions, 525 flow. Second operand 3 states and 748 transitions. [2022-11-20 11:37:32,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 249 transitions, 569 flow [2022-11-20 11:37:32,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 249 transitions, 569 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:32,692 INFO L231 Difference]: Finished difference. Result has 264 places, 246 transitions, 537 flow [2022-11-20 11:37:32,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=264, PETRI_TRANSITIONS=246} [2022-11-20 11:37:32,694 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, -9 predicate places. [2022-11-20 11:37:32,694 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 246 transitions, 537 flow [2022-11-20 11:37:32,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:32,695 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:32,695 INFO L209 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] [2022-11-20 11:37:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 11:37:32,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2052585952, now seen corresponding path program 1 times [2022-11-20 11:37:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:32,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145418431] [2022-11-20 11:37:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:32,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:32,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:32,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145418431] [2022-11-20 11:37:32,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145418431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:32,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727161419] [2022-11-20 11:37:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:32,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:32,777 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:32,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:37:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:32,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:32,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727161419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:32,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:32,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:32,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662564292] [2022-11-20 11:37:32,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:32,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:32,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:32,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:32,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-11-20 11:37:33,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 246 transitions, 537 flow. Second operand has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:33,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:33,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-11-20 11:37:33,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:33,179 INFO L130 PetriNetUnfolder]: 0/355 cut-off events. [2022-11-20 11:37:33,179 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-20 11:37:33,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 355 events. 0/355 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 979 event pairs, 0 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-20 11:37:33,181 INFO L137 encePairwiseOnDemand]: 298/304 looper letters, 17 selfloop transitions, 9 changer transitions 0/256 dead transitions. [2022-11-20 11:37:33,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 256 transitions, 611 flow [2022-11-20 11:37:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2206 transitions. [2022-11-20 11:37:33,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8062865497076024 [2022-11-20 11:37:33,185 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2206 transitions. [2022-11-20 11:37:33,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2206 transitions. [2022-11-20 11:37:33,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:33,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2206 transitions. [2022-11-20 11:37:33,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 245.11111111111111) internal successors, (2206), 9 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:33,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:33,194 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:33,194 INFO L175 Difference]: Start difference. First operand has 264 places, 246 transitions, 537 flow. Second operand 9 states and 2206 transitions. [2022-11-20 11:37:33,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 256 transitions, 611 flow [2022-11-20 11:37:33,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 256 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:33,200 INFO L231 Difference]: Finished difference. Result has 274 places, 252 transitions, 585 flow [2022-11-20 11:37:33,200 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=585, PETRI_PLACES=274, PETRI_TRANSITIONS=252} [2022-11-20 11:37:33,201 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 1 predicate places. [2022-11-20 11:37:33,201 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 252 transitions, 585 flow [2022-11-20 11:37:33,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:33,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:33,203 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:33,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:33,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:37:33,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:33,414 INFO L85 PathProgramCache]: Analyzing trace with hash 900912405, now seen corresponding path program 1 times [2022-11-20 11:37:33,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:33,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316124667] [2022-11-20 11:37:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:33,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:33,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316124667] [2022-11-20 11:37:33,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316124667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190854512] [2022-11-20 11:37:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:33,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:33,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:33,561 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:33,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:37:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:33,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:37:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:33,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:33,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190854512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:33,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:33,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:37:33,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343378147] [2022-11-20 11:37:33,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:33,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:33,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-11-20 11:37:33,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 252 transitions, 585 flow. Second operand has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:33,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:33,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-11-20 11:37:33,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:34,270 INFO L130 PetriNetUnfolder]: 0/303 cut-off events. [2022-11-20 11:37:34,270 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-20 11:37:34,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 303 events. 0/303 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 639 event pairs, 0 based on Foata normal form. 4/307 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-20 11:37:34,271 INFO L137 encePairwiseOnDemand]: 298/304 looper letters, 25 selfloop transitions, 21 changer transitions 0/276 dead transitions. [2022-11-20 11:37:34,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 276 transitions, 785 flow [2022-11-20 11:37:34,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:37:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:37:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5132 transitions. [2022-11-20 11:37:34,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8038847117794486 [2022-11-20 11:37:34,283 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5132 transitions. [2022-11-20 11:37:34,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5132 transitions. [2022-11-20 11:37:34,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:34,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5132 transitions. [2022-11-20 11:37:34,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 244.38095238095238) internal successors, (5132), 21 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:34,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:34,310 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:34,310 INFO L175 Difference]: Start difference. First operand has 274 places, 252 transitions, 585 flow. Second operand 21 states and 5132 transitions. [2022-11-20 11:37:34,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 276 transitions, 785 flow [2022-11-20 11:37:34,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 276 transitions, 771 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:34,319 INFO L231 Difference]: Finished difference. Result has 298 places, 265 transitions, 709 flow [2022-11-20 11:37:34,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=709, PETRI_PLACES=298, PETRI_TRANSITIONS=265} [2022-11-20 11:37:34,321 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 25 predicate places. [2022-11-20 11:37:34,321 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 265 transitions, 709 flow [2022-11-20 11:37:34,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:34,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:34,323 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:34,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:34,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:34,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1779148577, now seen corresponding path program 1 times [2022-11-20 11:37:34,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:34,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831079237] [2022-11-20 11:37:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:34,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:34,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:34,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:34,595 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:34,595 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:34,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:34,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 11:37:34,596 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 11:37:34,598 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:34,598 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-20 11:37:34,633 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:34,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 337 transitions, 770 flow [2022-11-20 11:37:34,763 INFO L130 PetriNetUnfolder]: 84/644 cut-off events. [2022-11-20 11:37:34,763 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-20 11:37:34,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 644 events. 84/644 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2269 event pairs, 0 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 606. Up to 18 conditions per place. [2022-11-20 11:37:34,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 337 transitions, 770 flow [2022-11-20 11:37:34,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 337 transitions, 770 flow [2022-11-20 11:37:34,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:34,783 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:34,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:34,790 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:37:34,790 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:34,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:34,791 INFO L209 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] [2022-11-20 11:37:34,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash -180437562, now seen corresponding path program 1 times [2022-11-20 11:37:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:34,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420884671] [2022-11-20 11:37:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:34,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:34,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:34,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420884671] [2022-11-20 11:37:34,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420884671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:34,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:34,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:34,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654918339] [2022-11-20 11:37:34,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:34,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:34,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:34,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:34,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:34,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 337 [2022-11-20 11:37:34,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 337 transitions, 770 flow. Second operand has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:34,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:34,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 337 [2022-11-20 11:37:34,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:34,974 INFO L130 PetriNetUnfolder]: 0/551 cut-off events. [2022-11-20 11:37:34,974 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-11-20 11:37:34,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 551 events. 0/551 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2052 event pairs, 0 based on Foata normal form. 212/745 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-20 11:37:34,976 INFO L137 encePairwiseOnDemand]: 285/337 looper letters, 8 selfloop transitions, 0 changer transitions 12/284 dead transitions. [2022-11-20 11:37:34,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 284 transitions, 680 flow [2022-11-20 11:37:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 612 transitions. [2022-11-20 11:37:34,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9080118694362018 [2022-11-20 11:37:34,978 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 612 transitions. [2022-11-20 11:37:34,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 612 transitions. [2022-11-20 11:37:34,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:34,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 612 transitions. [2022-11-20 11:37:34,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 306.0) internal successors, (612), 2 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:34,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:34,982 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:34,982 INFO L175 Difference]: Start difference. First operand has 302 places, 337 transitions, 770 flow. Second operand 2 states and 612 transitions. [2022-11-20 11:37:34,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 284 transitions, 680 flow [2022-11-20 11:37:34,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 284 transitions, 624 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:34,987 INFO L231 Difference]: Finished difference. Result has 302 places, 272 transitions, 584 flow [2022-11-20 11:37:34,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=584, PETRI_PLACES=302, PETRI_TRANSITIONS=272} [2022-11-20 11:37:34,988 INFO L288 CegarLoopForPetriNet]: 302 programPoint places, 0 predicate places. [2022-11-20 11:37:34,989 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 272 transitions, 584 flow [2022-11-20 11:37:34,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:34,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:34,989 INFO L209 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] [2022-11-20 11:37:34,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 11:37:34,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash -473840569, now seen corresponding path program 1 times [2022-11-20 11:37:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:34,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504413770] [2022-11-20 11:37:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:34,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:35,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:35,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504413770] [2022-11-20 11:37:35,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504413770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:35,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:35,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:35,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348214696] [2022-11-20 11:37:35,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:35,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:35,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 337 [2022-11-20 11:37:35,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 272 transitions, 584 flow. Second operand 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) [2022-11-20 11:37:35,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:35,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 337 [2022-11-20 11:37:35,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:35,160 INFO L130 PetriNetUnfolder]: 0/430 cut-off events. [2022-11-20 11:37:35,160 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 11:37:35,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 430 events. 0/430 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1319 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-20 11:37:35,162 INFO L137 encePairwiseOnDemand]: 334/337 looper letters, 17 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2022-11-20 11:37:35,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 276 transitions, 630 flow [2022-11-20 11:37:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2022-11-20 11:37:35,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8180019782393669 [2022-11-20 11:37:35,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2022-11-20 11:37:35,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2022-11-20 11:37:35,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:35,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2022-11-20 11:37:35,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:35,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:35,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:35,169 INFO L175 Difference]: Start difference. First operand has 302 places, 272 transitions, 584 flow. Second operand 3 states and 827 transitions. [2022-11-20 11:37:35,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 276 transitions, 630 flow [2022-11-20 11:37:35,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 276 transitions, 630 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:35,175 INFO L231 Difference]: Finished difference. Result has 293 places, 273 transitions, 596 flow [2022-11-20 11:37:35,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=596, PETRI_PLACES=293, PETRI_TRANSITIONS=273} [2022-11-20 11:37:35,176 INFO L288 CegarLoopForPetriNet]: 302 programPoint places, -9 predicate places. [2022-11-20 11:37:35,176 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 273 transitions, 596 flow [2022-11-20 11:37:35,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-20 11:37:35,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:35,177 INFO L209 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] [2022-11-20 11:37:35,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-20 11:37:35,178 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:35,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1853817472, now seen corresponding path program 1 times [2022-11-20 11:37:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:35,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917531327] [2022-11-20 11:37:35,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:35,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:35,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917531327] [2022-11-20 11:37:35,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917531327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508912415] [2022-11-20 11:37:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:35,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:35,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:35,249 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:35,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:37:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:35,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:35,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508912415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:35,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:35,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133868363] [2022-11-20 11:37:35,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:35,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:35,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:35,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-11-20 11:37:35,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 273 transitions, 596 flow. Second operand has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:35,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:35,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-11-20 11:37:35,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:35,707 INFO L130 PetriNetUnfolder]: 0/404 cut-off events. [2022-11-20 11:37:35,708 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 11:37:35,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 404 events. 0/404 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1169 event pairs, 0 based on Foata normal form. 2/406 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-20 11:37:35,709 INFO L137 encePairwiseOnDemand]: 331/337 looper letters, 18 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2022-11-20 11:37:35,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 283 transitions, 672 flow [2022-11-20 11:37:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2441 transitions. [2022-11-20 11:37:35,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8048137157929443 [2022-11-20 11:37:35,713 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2441 transitions. [2022-11-20 11:37:35,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2441 transitions. [2022-11-20 11:37:35,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:35,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2441 transitions. [2022-11-20 11:37:35,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.22222222222223) internal successors, (2441), 9 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:35,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:35,724 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:35,724 INFO L175 Difference]: Start difference. First operand has 293 places, 273 transitions, 596 flow. Second operand 9 states and 2441 transitions. [2022-11-20 11:37:35,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 283 transitions, 672 flow [2022-11-20 11:37:35,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 283 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:35,730 INFO L231 Difference]: Finished difference. Result has 303 places, 279 transitions, 644 flow [2022-11-20 11:37:35,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=644, PETRI_PLACES=303, PETRI_TRANSITIONS=279} [2022-11-20 11:37:35,731 INFO L288 CegarLoopForPetriNet]: 302 programPoint places, 1 predicate places. [2022-11-20 11:37:35,732 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 279 transitions, 644 flow [2022-11-20 11:37:35,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:35,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:35,733 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:35,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:35,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 11:37:35,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1758776885, now seen corresponding path program 1 times [2022-11-20 11:37:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671876455] [2022-11-20 11:37:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:35,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:36,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671876455] [2022-11-20 11:37:36,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671876455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166371567] [2022-11-20 11:37:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:36,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:36,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:36,085 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:36,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:37:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:36,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:37:36,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:36,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:36,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166371567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:36,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:36,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:37:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293356964] [2022-11-20 11:37:36,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:36,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:36,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-11-20 11:37:36,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 279 transitions, 644 flow. Second operand has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:36,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:36,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-11-20 11:37:36,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:36,853 INFO L130 PetriNetUnfolder]: 0/352 cut-off events. [2022-11-20 11:37:36,853 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-20 11:37:36,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 352 events. 0/352 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 822 event pairs, 0 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-20 11:37:36,854 INFO L137 encePairwiseOnDemand]: 331/337 looper letters, 26 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2022-11-20 11:37:36,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 303 transitions, 846 flow [2022-11-20 11:37:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:37:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:37:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5679 transitions. [2022-11-20 11:37:36,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8024586689275116 [2022-11-20 11:37:36,861 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5679 transitions. [2022-11-20 11:37:36,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5679 transitions. [2022-11-20 11:37:36,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:36,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5679 transitions. [2022-11-20 11:37:36,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 270.42857142857144) internal successors, (5679), 21 states have internal predecessors, (5679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:36,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:36,883 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:36,884 INFO L175 Difference]: Start difference. First operand has 303 places, 279 transitions, 644 flow. Second operand 21 states and 5679 transitions. [2022-11-20 11:37:36,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 303 transitions, 846 flow [2022-11-20 11:37:36,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 303 transitions, 832 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:36,890 INFO L231 Difference]: Finished difference. Result has 327 places, 292 transitions, 768 flow [2022-11-20 11:37:36,891 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=768, PETRI_PLACES=327, PETRI_TRANSITIONS=292} [2022-11-20 11:37:36,892 INFO L288 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-11-20 11:37:36,892 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 292 transitions, 768 flow [2022-11-20 11:37:36,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:36,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:36,894 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:36,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:37,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:37,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:37,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1304864171, now seen corresponding path program 1 times [2022-11-20 11:37:37,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:37,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547165974] [2022-11-20 11:37:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:37,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:37,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547165974] [2022-11-20 11:37:37,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547165974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581260186] [2022-11-20 11:37:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:37,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:37,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:37,497 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:37,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:37:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:37,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:37:37,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:37,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:38,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581260186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:38,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:38,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:37:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7330599] [2022-11-20 11:37:38,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:38,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:37:38,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:37:38,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:37:38,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-11-20 11:37:38,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 292 transitions, 768 flow. Second operand has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:38,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-11-20 11:37:38,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:38,743 INFO L130 PetriNetUnfolder]: 0/326 cut-off events. [2022-11-20 11:37:38,743 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-20 11:37:38,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-20 11:37:38,745 INFO L137 encePairwiseOnDemand]: 332/337 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-11-20 11:37:38,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 296 transitions, 912 flow [2022-11-20 11:37:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:37:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-20 11:37:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7290 transitions. [2022-11-20 11:37:38,754 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8011869436201781 [2022-11-20 11:37:38,754 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7290 transitions. [2022-11-20 11:37:38,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7290 transitions. [2022-11-20 11:37:38,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:38,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7290 transitions. [2022-11-20 11:37:38,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 270.0) internal successors, (7290), 27 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,788 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,789 INFO L175 Difference]: Start difference. First operand has 327 places, 292 transitions, 768 flow. Second operand 27 states and 7290 transitions. [2022-11-20 11:37:38,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 296 transitions, 912 flow [2022-11-20 11:37:38,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-20 11:37:38,796 INFO L231 Difference]: Finished difference. Result has 327 places, 282 transitions, 751 flow [2022-11-20 11:37:38,797 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=327, PETRI_TRANSITIONS=282} [2022-11-20 11:37:38,799 INFO L288 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-11-20 11:37:38,799 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 282 transitions, 751 flow [2022-11-20 11:37:38,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:38,804 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:38,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:39,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 11:37:39,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:39,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1236984545, now seen corresponding path program 1 times [2022-11-20 11:37:39,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:39,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35558335] [2022-11-20 11:37:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:39,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:39,034 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:39,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:39,062 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:39,063 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:39,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:39,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-20 11:37:39,064 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 11:37:39,066 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:39,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-20 11:37:39,103 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:39,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 370 transitions, 857 flow [2022-11-20 11:37:39,348 INFO L130 PetriNetUnfolder]: 94/716 cut-off events. [2022-11-20 11:37:39,349 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-20 11:37:39,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 716 events. 94/716 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2540 event pairs, 0 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 687. Up to 20 conditions per place. [2022-11-20 11:37:39,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 370 transitions, 857 flow [2022-11-20 11:37:39,378 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 370 transitions, 857 flow [2022-11-20 11:37:39,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:39,379 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:39,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:39,386 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:37:39,386 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:39,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:39,386 INFO L209 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] [2022-11-20 11:37:39,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:39,387 INFO L85 PathProgramCache]: Analyzing trace with hash -210332282, now seen corresponding path program 1 times [2022-11-20 11:37:39,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:39,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218700277] [2022-11-20 11:37:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:39,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:39,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218700277] [2022-11-20 11:37:39,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218700277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:39,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:39,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:39,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008071590] [2022-11-20 11:37:39,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:39,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:39,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:39,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:39,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 370 [2022-11-20 11:37:39,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 370 transitions, 857 flow. Second operand has 2 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:39,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:39,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 370 [2022-11-20 11:37:39,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:39,576 INFO L130 PetriNetUnfolder]: 0/612 cut-off events. [2022-11-20 11:37:39,576 INFO L131 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2022-11-20 11:37:39,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 612 events. 0/612 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2322 event pairs, 0 based on Foata normal form. 264/856 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2022-11-20 11:37:39,578 INFO L137 encePairwiseOnDemand]: 312/370 looper letters, 9 selfloop transitions, 0 changer transitions 12/311 dead transitions. [2022-11-20 11:37:39,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 311 transitions, 757 flow [2022-11-20 11:37:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 671 transitions. [2022-11-20 11:37:39,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9067567567567567 [2022-11-20 11:37:39,581 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 671 transitions. [2022-11-20 11:37:39,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 671 transitions. [2022-11-20 11:37:39,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:39,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 671 transitions. [2022-11-20 11:37:39,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 335.5) internal successors, (671), 2 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:39,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:39,584 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:39,585 INFO L175 Difference]: Start difference. First operand has 331 places, 370 transitions, 857 flow. Second operand 2 states and 671 transitions. [2022-11-20 11:37:39,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 311 transitions, 757 flow [2022-11-20 11:37:39,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 311 transitions, 685 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:39,592 INFO L231 Difference]: Finished difference. Result has 331 places, 299 transitions, 643 flow [2022-11-20 11:37:39,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=643, PETRI_PLACES=331, PETRI_TRANSITIONS=299} [2022-11-20 11:37:39,593 INFO L288 CegarLoopForPetriNet]: 331 programPoint places, 0 predicate places. [2022-11-20 11:37:39,593 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 299 transitions, 643 flow [2022-11-20 11:37:39,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:39,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:39,594 INFO L209 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] [2022-11-20 11:37:39,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-20 11:37:39,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:39,595 INFO L85 PathProgramCache]: Analyzing trace with hash -503735289, now seen corresponding path program 1 times [2022-11-20 11:37:39,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:39,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448412145] [2022-11-20 11:37:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:39,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:39,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:39,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448412145] [2022-11-20 11:37:39,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448412145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:39,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:39,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:39,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522864441] [2022-11-20 11:37:39,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:39,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:39,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:39,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:39,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 370 [2022-11-20 11:37:39,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 299 transitions, 643 flow. Second operand has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:39,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:39,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 370 [2022-11-20 11:37:39,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:39,807 INFO L130 PetriNetUnfolder]: 0/479 cut-off events. [2022-11-20 11:37:39,808 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 11:37:39,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 479 events. 0/479 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1502 event pairs, 0 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-20 11:37:39,810 INFO L137 encePairwiseOnDemand]: 367/370 looper letters, 18 selfloop transitions, 2 changer transitions 0/303 dead transitions. [2022-11-20 11:37:39,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 303 transitions, 691 flow [2022-11-20 11:37:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2022-11-20 11:37:39,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8162162162162162 [2022-11-20 11:37:39,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2022-11-20 11:37:39,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2022-11-20 11:37:39,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:39,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2022-11-20 11:37:39,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 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) [2022-11-20 11:37:39,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:39,817 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:39,818 INFO L175 Difference]: Start difference. First operand has 331 places, 299 transitions, 643 flow. Second operand 3 states and 906 transitions. [2022-11-20 11:37:39,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 303 transitions, 691 flow [2022-11-20 11:37:39,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 303 transitions, 691 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:39,850 INFO L231 Difference]: Finished difference. Result has 322 places, 300 transitions, 655 flow [2022-11-20 11:37:39,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=655, PETRI_PLACES=322, PETRI_TRANSITIONS=300} [2022-11-20 11:37:39,851 INFO L288 CegarLoopForPetriNet]: 331 programPoint places, -9 predicate places. [2022-11-20 11:37:39,851 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 300 transitions, 655 flow [2022-11-20 11:37:39,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:39,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:39,851 INFO L209 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] [2022-11-20 11:37:39,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-20 11:37:39,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:39,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:39,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1805231264, now seen corresponding path program 1 times [2022-11-20 11:37:39,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:39,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532992119] [2022-11-20 11:37:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:39,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:39,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:39,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532992119] [2022-11-20 11:37:39,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532992119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:39,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879307607] [2022-11-20 11:37:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:39,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:39,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:39,909 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:39,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:37:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:40,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:40,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:40,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:40,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879307607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:40,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:40,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:40,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497510082] [2022-11-20 11:37:40,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:40,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:40,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:40,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:40,167 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-11-20 11:37:40,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 300 transitions, 655 flow. Second operand has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:40,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:40,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-11-20 11:37:40,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:40,389 INFO L130 PetriNetUnfolder]: 0/453 cut-off events. [2022-11-20 11:37:40,390 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-20 11:37:40,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 453 events. 0/453 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1345 event pairs, 0 based on Foata normal form. 2/455 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-20 11:37:40,391 INFO L137 encePairwiseOnDemand]: 364/370 looper letters, 19 selfloop transitions, 9 changer transitions 0/310 dead transitions. [2022-11-20 11:37:40,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 310 transitions, 733 flow [2022-11-20 11:37:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2676 transitions. [2022-11-20 11:37:40,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8036036036036036 [2022-11-20 11:37:40,396 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2676 transitions. [2022-11-20 11:37:40,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2676 transitions. [2022-11-20 11:37:40,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:40,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2676 transitions. [2022-11-20 11:37:40,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 297.3333333333333) internal successors, (2676), 9 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:40,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:40,405 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:40,405 INFO L175 Difference]: Start difference. First operand has 322 places, 300 transitions, 655 flow. Second operand 9 states and 2676 transitions. [2022-11-20 11:37:40,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 310 transitions, 733 flow [2022-11-20 11:37:40,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 310 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:40,411 INFO L231 Difference]: Finished difference. Result has 332 places, 306 transitions, 703 flow [2022-11-20 11:37:40,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=703, PETRI_PLACES=332, PETRI_TRANSITIONS=306} [2022-11-20 11:37:40,413 INFO L288 CegarLoopForPetriNet]: 331 programPoint places, 1 predicate places. [2022-11-20 11:37:40,413 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 306 transitions, 703 flow [2022-11-20 11:37:40,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:40,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:40,414 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:40,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:40,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 484043797, now seen corresponding path program 1 times [2022-11-20 11:37:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:40,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055214494] [2022-11-20 11:37:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:40,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:40,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055214494] [2022-11-20 11:37:40,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055214494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:40,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773109489] [2022-11-20 11:37:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:40,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:40,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:40,782 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:40,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:37:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:40,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:37:40,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:41,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:41,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773109489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:41,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:41,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:37:41,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219256366] [2022-11-20 11:37:41,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:41,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:41,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:41,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:41,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-11-20 11:37:41,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 306 transitions, 703 flow. Second operand has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:41,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:41,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-11-20 11:37:41,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:41,568 INFO L130 PetriNetUnfolder]: 0/401 cut-off events. [2022-11-20 11:37:41,568 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 11:37:41,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 401 events. 0/401 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1006 event pairs, 0 based on Foata normal form. 4/405 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 11:37:41,569 INFO L137 encePairwiseOnDemand]: 364/370 looper letters, 27 selfloop transitions, 21 changer transitions 0/330 dead transitions. [2022-11-20 11:37:41,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 330 transitions, 907 flow [2022-11-20 11:37:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:37:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:37:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6226 transitions. [2022-11-20 11:37:41,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8012870012870013 [2022-11-20 11:37:41,582 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6226 transitions. [2022-11-20 11:37:41,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6226 transitions. [2022-11-20 11:37:41,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:41,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6226 transitions. [2022-11-20 11:37:41,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 296.4761904761905) internal successors, (6226), 21 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:41,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:41,607 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:41,607 INFO L175 Difference]: Start difference. First operand has 332 places, 306 transitions, 703 flow. Second operand 21 states and 6226 transitions. [2022-11-20 11:37:41,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 330 transitions, 907 flow [2022-11-20 11:37:41,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 330 transitions, 893 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:41,614 INFO L231 Difference]: Finished difference. Result has 356 places, 319 transitions, 827 flow [2022-11-20 11:37:41,615 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=827, PETRI_PLACES=356, PETRI_TRANSITIONS=319} [2022-11-20 11:37:41,615 INFO L288 CegarLoopForPetriNet]: 331 programPoint places, 25 predicate places. [2022-11-20 11:37:41,616 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 319 transitions, 827 flow [2022-11-20 11:37:41,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:41,617 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:41,617 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:41,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:41,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:41,824 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1803030795, now seen corresponding path program 1 times [2022-11-20 11:37:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:41,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371038507] [2022-11-20 11:37:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:41,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:42,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371038507] [2022-11-20 11:37:42,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371038507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063701200] [2022-11-20 11:37:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:42,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:42,136 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:42,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:37:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:37:42,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:42,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:42,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063701200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:42,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:42,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:37:42,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017119517] [2022-11-20 11:37:42,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:42,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:37:42,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:42,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:37:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:37:42,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-11-20 11:37:42,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 319 transitions, 827 flow. Second operand has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:42,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:42,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-11-20 11:37:42,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:43,481 INFO L130 PetriNetUnfolder]: 0/362 cut-off events. [2022-11-20 11:37:43,482 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-20 11:37:43,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 11:37:43,483 INFO L137 encePairwiseOnDemand]: 365/370 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-11-20 11:37:43,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 328 transitions, 1017 flow [2022-11-20 11:37:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:37:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 11:37:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8881 transitions. [2022-11-20 11:37:43,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8000900900900901 [2022-11-20 11:37:43,497 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8881 transitions. [2022-11-20 11:37:43,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8881 transitions. [2022-11-20 11:37:43,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:43,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8881 transitions. [2022-11-20 11:37:43,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 296.03333333333336) internal successors, (8881), 30 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:43,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:43,540 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:43,541 INFO L175 Difference]: Start difference. First operand has 356 places, 319 transitions, 827 flow. Second operand 30 states and 8881 transitions. [2022-11-20 11:37:43,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 328 transitions, 1017 flow [2022-11-20 11:37:43,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-20 11:37:43,550 INFO L231 Difference]: Finished difference. Result has 359 places, 312 transitions, 834 flow [2022-11-20 11:37:43,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=359, PETRI_TRANSITIONS=312} [2022-11-20 11:37:43,551 INFO L288 CegarLoopForPetriNet]: 331 programPoint places, 28 predicate places. [2022-11-20 11:37:43,551 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 312 transitions, 834 flow [2022-11-20 11:37:43,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:43,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:43,553 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:43,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:43,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-20 11:37:43,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash 226570656, now seen corresponding path program 1 times [2022-11-20 11:37:43,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:43,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653900680] [2022-11-20 11:37:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:43,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:43,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:43,817 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:43,818 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:43,818 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:43,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:43,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-20 11:37:43,818 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 11:37:43,819 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:43,819 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-20 11:37:43,856 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:43,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 360 places, 403 transitions, 946 flow [2022-11-20 11:37:44,051 INFO L130 PetriNetUnfolder]: 104/788 cut-off events. [2022-11-20 11:37:44,051 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-20 11:37:44,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 788 events. 104/788 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2829 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 769. Up to 22 conditions per place. [2022-11-20 11:37:44,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 403 transitions, 946 flow [2022-11-20 11:37:44,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 403 transitions, 946 flow [2022-11-20 11:37:44,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:44,090 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:44,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:44,096 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:37:44,096 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:44,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:44,097 INFO L209 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] [2022-11-20 11:37:44,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1498309670, now seen corresponding path program 1 times [2022-11-20 11:37:44,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:44,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991157936] [2022-11-20 11:37:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:44,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:44,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:44,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991157936] [2022-11-20 11:37:44,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991157936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:44,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:44,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129074408] [2022-11-20 11:37:44,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:44,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:44,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:44,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 403 [2022-11-20 11:37:44,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 403 transitions, 946 flow. Second operand has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:44,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:44,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 403 [2022-11-20 11:37:44,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:44,377 INFO L130 PetriNetUnfolder]: 0/673 cut-off events. [2022-11-20 11:37:44,378 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-11-20 11:37:44,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 673 events. 0/673 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2591 event pairs, 0 based on Foata normal form. 322/973 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-20 11:37:44,386 INFO L137 encePairwiseOnDemand]: 339/403 looper letters, 10 selfloop transitions, 0 changer transitions 12/338 dead transitions. [2022-11-20 11:37:44,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 338 transitions, 836 flow [2022-11-20 11:37:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 730 transitions. [2022-11-20 11:37:44,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9057071960297767 [2022-11-20 11:37:44,389 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 730 transitions. [2022-11-20 11:37:44,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 730 transitions. [2022-11-20 11:37:44,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:44,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 730 transitions. [2022-11-20 11:37:44,392 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) [2022-11-20 11:37:44,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:44,393 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:44,394 INFO L175 Difference]: Start difference. First operand has 360 places, 403 transitions, 946 flow. Second operand 2 states and 730 transitions. [2022-11-20 11:37:44,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 338 transitions, 836 flow [2022-11-20 11:37:44,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 338 transitions, 746 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:44,402 INFO L231 Difference]: Finished difference. Result has 360 places, 326 transitions, 702 flow [2022-11-20 11:37:44,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=702, PETRI_PLACES=360, PETRI_TRANSITIONS=326} [2022-11-20 11:37:44,403 INFO L288 CegarLoopForPetriNet]: 360 programPoint places, 0 predicate places. [2022-11-20 11:37:44,404 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 326 transitions, 702 flow [2022-11-20 11:37:44,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:44,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:44,404 INFO L209 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] [2022-11-20 11:37:44,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-20 11:37:44,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1204906663, now seen corresponding path program 1 times [2022-11-20 11:37:44,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:44,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998246471] [2022-11-20 11:37:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:44,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:44,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:44,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998246471] [2022-11-20 11:37:44,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998246471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:44,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:44,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:44,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715940325] [2022-11-20 11:37:44,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:44,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:44,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:44,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:44,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:44,451 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 403 [2022-11-20 11:37:44,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 326 transitions, 702 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:44,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:44,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 403 [2022-11-20 11:37:44,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:44,645 INFO L130 PetriNetUnfolder]: 0/528 cut-off events. [2022-11-20 11:37:44,645 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-20 11:37:44,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 528 events. 0/528 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1685 event pairs, 0 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-20 11:37:44,647 INFO L137 encePairwiseOnDemand]: 400/403 looper letters, 19 selfloop transitions, 2 changer transitions 0/330 dead transitions. [2022-11-20 11:37:44,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 330 transitions, 752 flow [2022-11-20 11:37:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2022-11-20 11:37:44,649 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8147229114971051 [2022-11-20 11:37:44,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 985 transitions. [2022-11-20 11:37:44,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 985 transitions. [2022-11-20 11:37:44,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:44,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 985 transitions. [2022-11-20 11:37:44,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:44,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:44,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:44,653 INFO L175 Difference]: Start difference. First operand has 360 places, 326 transitions, 702 flow. Second operand 3 states and 985 transitions. [2022-11-20 11:37:44,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 330 transitions, 752 flow [2022-11-20 11:37:44,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 330 transitions, 752 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:44,659 INFO L231 Difference]: Finished difference. Result has 351 places, 327 transitions, 714 flow [2022-11-20 11:37:44,660 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=351, PETRI_TRANSITIONS=327} [2022-11-20 11:37:44,660 INFO L288 CegarLoopForPetriNet]: 360 programPoint places, -9 predicate places. [2022-11-20 11:37:44,661 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 327 transitions, 714 flow [2022-11-20 11:37:44,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:44,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:44,661 INFO L209 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] [2022-11-20 11:37:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-20 11:37:44,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 144830272, now seen corresponding path program 1 times [2022-11-20 11:37:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:44,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788575477] [2022-11-20 11:37:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:44,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:44,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788575477] [2022-11-20 11:37:44,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788575477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:44,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433112695] [2022-11-20 11:37:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:44,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:44,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:44,719 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:44,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:37:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:44,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:44,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:45,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433112695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:45,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:45,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:45,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633370876] [2022-11-20 11:37:45,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:45,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:45,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:45,014 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-11-20 11:37:45,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 327 transitions, 714 flow. Second operand has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:45,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:45,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-11-20 11:37:45,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:45,251 INFO L130 PetriNetUnfolder]: 0/502 cut-off events. [2022-11-20 11:37:45,252 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-20 11:37:45,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 502 events. 0/502 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1531 event pairs, 0 based on Foata normal form. 2/504 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-20 11:37:45,253 INFO L137 encePairwiseOnDemand]: 397/403 looper letters, 20 selfloop transitions, 9 changer transitions 0/337 dead transitions. [2022-11-20 11:37:45,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 337 transitions, 794 flow [2022-11-20 11:37:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2911 transitions. [2022-11-20 11:37:45,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8025916735594155 [2022-11-20 11:37:45,258 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2911 transitions. [2022-11-20 11:37:45,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2911 transitions. [2022-11-20 11:37:45,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:45,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2911 transitions. [2022-11-20 11:37:45,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.44444444444446) internal successors, (2911), 9 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:45,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:45,267 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:45,267 INFO L175 Difference]: Start difference. First operand has 351 places, 327 transitions, 714 flow. Second operand 9 states and 2911 transitions. [2022-11-20 11:37:45,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 337 transitions, 794 flow [2022-11-20 11:37:45,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 337 transitions, 792 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:45,274 INFO L231 Difference]: Finished difference. Result has 361 places, 333 transitions, 762 flow [2022-11-20 11:37:45,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=762, PETRI_PLACES=361, PETRI_TRANSITIONS=333} [2022-11-20 11:37:45,275 INFO L288 CegarLoopForPetriNet]: 360 programPoint places, 1 predicate places. [2022-11-20 11:37:45,275 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 333 transitions, 762 flow [2022-11-20 11:37:45,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:45,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:45,276 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:45,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:45,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-20 11:37:45,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1371680437, now seen corresponding path program 1 times [2022-11-20 11:37:45,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:45,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417143680] [2022-11-20 11:37:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:45,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:45,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417143680] [2022-11-20 11:37:45,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417143680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:45,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124603648] [2022-11-20 11:37:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:45,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:45,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:45,641 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:45,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:37:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:45,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:37:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:45,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:46,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124603648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:46,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:46,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:37:46,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676904959] [2022-11-20 11:37:46,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:46,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:46,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:46,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:46,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:46,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-11-20 11:37:46,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 333 transitions, 762 flow. Second operand has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:46,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-11-20 11:37:46,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:46,427 INFO L130 PetriNetUnfolder]: 0/450 cut-off events. [2022-11-20 11:37:46,427 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-20 11:37:46,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 450 events. 0/450 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1190 event pairs, 0 based on Foata normal form. 4/454 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-20 11:37:46,429 INFO L137 encePairwiseOnDemand]: 397/403 looper letters, 28 selfloop transitions, 21 changer transitions 0/357 dead transitions. [2022-11-20 11:37:46,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 357 transitions, 968 flow [2022-11-20 11:37:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:37:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:37:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6773 transitions. [2022-11-20 11:37:46,436 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8003072196620584 [2022-11-20 11:37:46,436 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6773 transitions. [2022-11-20 11:37:46,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6773 transitions. [2022-11-20 11:37:46,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:46,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6773 transitions. [2022-11-20 11:37:46,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 322.5238095238095) internal successors, (6773), 21 states have internal predecessors, (6773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,456 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,456 INFO L175 Difference]: Start difference. First operand has 361 places, 333 transitions, 762 flow. Second operand 21 states and 6773 transitions. [2022-11-20 11:37:46,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 357 transitions, 968 flow [2022-11-20 11:37:46,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 357 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:46,463 INFO L231 Difference]: Finished difference. Result has 385 places, 346 transitions, 886 flow [2022-11-20 11:37:46,464 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=886, PETRI_PLACES=385, PETRI_TRANSITIONS=346} [2022-11-20 11:37:46,465 INFO L288 CegarLoopForPetriNet]: 360 programPoint places, 25 predicate places. [2022-11-20 11:37:46,465 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 346 transitions, 886 flow [2022-11-20 11:37:46,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:46,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:46,467 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:46,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:46,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 11:37:46,673 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash -149142613, now seen corresponding path program 1 times [2022-11-20 11:37:46,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:46,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927017732] [2022-11-20 11:37:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:46,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927017732] [2022-11-20 11:37:46,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927017732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231734875] [2022-11-20 11:37:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:46,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:46,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:46,992 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:47,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:37:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:47,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:37:47,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:47,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:47,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231734875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:47,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:47,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:37:47,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142646223] [2022-11-20 11:37:47,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:47,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:37:47,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:47,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:37:47,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:37:47,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-11-20 11:37:47,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 346 transitions, 886 flow. Second operand has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:47,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:47,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-11-20 11:37:47,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:48,329 INFO L130 PetriNetUnfolder]: 0/398 cut-off events. [2022-11-20 11:37:48,330 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-20 11:37:48,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-20 11:37:48,331 INFO L137 encePairwiseOnDemand]: 398/403 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-11-20 11:37:48,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-11-20 11:37:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:37:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-20 11:37:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10628 transitions. [2022-11-20 11:37:48,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7991578314158959 [2022-11-20 11:37:48,343 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10628 transitions. [2022-11-20 11:37:48,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10628 transitions. [2022-11-20 11:37:48,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:48,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10628 transitions. [2022-11-20 11:37:48,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 322.06060606060606) internal successors, (10628), 33 states have internal predecessors, (10628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:48,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:48,374 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:48,374 INFO L175 Difference]: Start difference. First operand has 385 places, 346 transitions, 886 flow. Second operand 33 states and 10628 transitions. [2022-11-20 11:37:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-11-20 11:37:48,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-20 11:37:48,382 INFO L231 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-11-20 11:37:48,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-11-20 11:37:48,384 INFO L288 CegarLoopForPetriNet]: 360 programPoint places, 31 predicate places. [2022-11-20 11:37:48,384 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-11-20 11:37:48,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:48,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:48,387 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:48,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:48,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-20 11:37:48,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:48,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1786652926, now seen corresponding path program 1 times [2022-11-20 11:37:48,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:48,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984704958] [2022-11-20 11:37:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:48,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:48,664 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:48,737 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:48,737 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:48,737 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:48,737 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:48,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-20 11:37:48,738 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 11:37:48,738 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:48,738 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-20 11:37:48,776 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:48,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 389 places, 436 transitions, 1037 flow [2022-11-20 11:37:48,997 INFO L130 PetriNetUnfolder]: 114/860 cut-off events. [2022-11-20 11:37:48,998 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-11-20 11:37:49,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 860 events. 114/860 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3102 event pairs, 0 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 852. Up to 24 conditions per place. [2022-11-20 11:37:49,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 389 places, 436 transitions, 1037 flow [2022-11-20 11:37:49,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 436 transitions, 1037 flow [2022-11-20 11:37:49,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:49,042 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:49,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:49,048 INFO L130 PetriNetUnfolder]: 4/88 cut-off events. [2022-11-20 11:37:49,048 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:49,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:49,049 INFO L209 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] [2022-11-20 11:37:49,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash 650520998, now seen corresponding path program 1 times [2022-11-20 11:37:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:49,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549592518] [2022-11-20 11:37:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:49,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:49,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549592518] [2022-11-20 11:37:49,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549592518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:49,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:49,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:49,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926825379] [2022-11-20 11:37:49,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:49,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:49,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:49,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 436 [2022-11-20 11:37:49,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 436 transitions, 1037 flow. Second operand has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:49,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 436 [2022-11-20 11:37:49,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:49,297 INFO L130 PetriNetUnfolder]: 0/734 cut-off events. [2022-11-20 11:37:49,297 INFO L131 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-11-20 11:37:49,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 734 events. 0/734 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2859 event pairs, 0 based on Foata normal form. 386/1096 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-20 11:37:49,299 INFO L137 encePairwiseOnDemand]: 366/436 looper letters, 11 selfloop transitions, 0 changer transitions 12/365 dead transitions. [2022-11-20 11:37:49,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 365 transitions, 917 flow [2022-11-20 11:37:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 789 transitions. [2022-11-20 11:37:49,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9048165137614679 [2022-11-20 11:37:49,301 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 789 transitions. [2022-11-20 11:37:49,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 789 transitions. [2022-11-20 11:37:49,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:49,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 789 transitions. [2022-11-20 11:37:49,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.5) internal successors, (789), 2 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,304 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,305 INFO L175 Difference]: Start difference. First operand has 389 places, 436 transitions, 1037 flow. Second operand 2 states and 789 transitions. [2022-11-20 11:37:49,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 365 transitions, 917 flow [2022-11-20 11:37:49,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 365 transitions, 807 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:49,312 INFO L231 Difference]: Finished difference. Result has 389 places, 353 transitions, 761 flow [2022-11-20 11:37:49,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=761, PETRI_PLACES=389, PETRI_TRANSITIONS=353} [2022-11-20 11:37:49,313 INFO L288 CegarLoopForPetriNet]: 389 programPoint places, 0 predicate places. [2022-11-20 11:37:49,313 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 353 transitions, 761 flow [2022-11-20 11:37:49,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:49,315 INFO L209 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] [2022-11-20 11:37:49,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-20 11:37:49,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:49,316 INFO L85 PathProgramCache]: Analyzing trace with hash 357117991, now seen corresponding path program 1 times [2022-11-20 11:37:49,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:49,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800651918] [2022-11-20 11:37:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:49,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:49,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800651918] [2022-11-20 11:37:49,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800651918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:49,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:49,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:49,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705665376] [2022-11-20 11:37:49,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:49,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:49,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:49,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 436 [2022-11-20 11:37:49,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 353 transitions, 761 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:49,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 436 [2022-11-20 11:37:49,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:49,559 INFO L130 PetriNetUnfolder]: 0/577 cut-off events. [2022-11-20 11:37:49,559 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 11:37:49,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 577 events. 0/577 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1868 event pairs, 0 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-20 11:37:49,561 INFO L137 encePairwiseOnDemand]: 433/436 looper letters, 20 selfloop transitions, 2 changer transitions 0/357 dead transitions. [2022-11-20 11:37:49,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 357 transitions, 813 flow [2022-11-20 11:37:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2022-11-20 11:37:49,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8134556574923547 [2022-11-20 11:37:49,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2022-11-20 11:37:49,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2022-11-20 11:37:49,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:49,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2022-11-20 11:37:49,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,567 INFO L175 Difference]: Start difference. First operand has 389 places, 353 transitions, 761 flow. Second operand 3 states and 1064 transitions. [2022-11-20 11:37:49,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 357 transitions, 813 flow [2022-11-20 11:37:49,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 357 transitions, 813 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:49,573 INFO L231 Difference]: Finished difference. Result has 380 places, 354 transitions, 773 flow [2022-11-20 11:37:49,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=773, PETRI_PLACES=380, PETRI_TRANSITIONS=354} [2022-11-20 11:37:49,575 INFO L288 CegarLoopForPetriNet]: 389 programPoint places, -9 predicate places. [2022-11-20 11:37:49,575 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 354 transitions, 773 flow [2022-11-20 11:37:49,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:49,576 INFO L209 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] [2022-11-20 11:37:49,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-20 11:37:49,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1754914144, now seen corresponding path program 1 times [2022-11-20 11:37:49,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:49,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253051951] [2022-11-20 11:37:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:49,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:49,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:49,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253051951] [2022-11-20 11:37:49,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253051951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:49,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12121671] [2022-11-20 11:37:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:49,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:49,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:49,630 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:49,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:37:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:49,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:49,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:49,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12121671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:49,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:49,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:49,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359199492] [2022-11-20 11:37:49,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:49,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:49,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:49,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:49,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-11-20 11:37:49,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 354 transitions, 773 flow. Second operand has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:49,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:49,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-11-20 11:37:49,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:50,276 INFO L130 PetriNetUnfolder]: 0/551 cut-off events. [2022-11-20 11:37:50,276 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 11:37:50,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 551 events. 0/551 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1715 event pairs, 0 based on Foata normal form. 2/553 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-20 11:37:50,278 INFO L137 encePairwiseOnDemand]: 430/436 looper letters, 21 selfloop transitions, 9 changer transitions 0/364 dead transitions. [2022-11-20 11:37:50,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 364 transitions, 855 flow [2022-11-20 11:37:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3146 transitions. [2022-11-20 11:37:50,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8017329255861366 [2022-11-20 11:37:50,285 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3146 transitions. [2022-11-20 11:37:50,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3146 transitions. [2022-11-20 11:37:50,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:50,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3146 transitions. [2022-11-20 11:37:50,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 349.55555555555554) internal successors, (3146), 9 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:50,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:50,302 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:50,302 INFO L175 Difference]: Start difference. First operand has 380 places, 354 transitions, 773 flow. Second operand 9 states and 3146 transitions. [2022-11-20 11:37:50,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 364 transitions, 855 flow [2022-11-20 11:37:50,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 364 transitions, 853 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:50,310 INFO L231 Difference]: Finished difference. Result has 390 places, 360 transitions, 821 flow [2022-11-20 11:37:50,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=821, PETRI_PLACES=390, PETRI_TRANSITIONS=360} [2022-11-20 11:37:50,311 INFO L288 CegarLoopForPetriNet]: 389 programPoint places, 1 predicate places. [2022-11-20 11:37:50,311 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 360 transitions, 821 flow [2022-11-20 11:37:50,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:50,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:50,313 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:50,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:50,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:50,519 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:50,519 INFO L85 PathProgramCache]: Analyzing trace with hash 126719509, now seen corresponding path program 1 times [2022-11-20 11:37:50,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:50,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488496495] [2022-11-20 11:37:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:50,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:50,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:50,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488496495] [2022-11-20 11:37:50,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488496495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:50,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479778632] [2022-11-20 11:37:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:50,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:50,649 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:50,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 11:37:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:50,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:37:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:50,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:51,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479778632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:51,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:51,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:37:51,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213264945] [2022-11-20 11:37:51,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:51,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-11-20 11:37:51,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 360 transitions, 821 flow. Second operand has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:51,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:51,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-11-20 11:37:51,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:51,447 INFO L130 PetriNetUnfolder]: 0/499 cut-off events. [2022-11-20 11:37:51,448 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-20 11:37:51,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 499 events. 0/499 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1374 event pairs, 0 based on Foata normal form. 4/503 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-20 11:37:51,449 INFO L137 encePairwiseOnDemand]: 430/436 looper letters, 29 selfloop transitions, 21 changer transitions 0/384 dead transitions. [2022-11-20 11:37:51,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 384 transitions, 1029 flow [2022-11-20 11:37:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:37:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:37:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7320 transitions. [2022-11-20 11:37:51,460 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.799475753604194 [2022-11-20 11:37:51,461 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7320 transitions. [2022-11-20 11:37:51,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7320 transitions. [2022-11-20 11:37:51,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:51,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7320 transitions. [2022-11-20 11:37:51,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 348.57142857142856) internal successors, (7320), 21 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:51,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:51,482 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:51,483 INFO L175 Difference]: Start difference. First operand has 390 places, 360 transitions, 821 flow. Second operand 21 states and 7320 transitions. [2022-11-20 11:37:51,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 384 transitions, 1029 flow [2022-11-20 11:37:51,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 384 transitions, 1015 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:51,491 INFO L231 Difference]: Finished difference. Result has 414 places, 373 transitions, 945 flow [2022-11-20 11:37:51,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=945, PETRI_PLACES=414, PETRI_TRANSITIONS=373} [2022-11-20 11:37:51,492 INFO L288 CegarLoopForPetriNet]: 389 programPoint places, 25 predicate places. [2022-11-20 11:37:51,493 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 373 transitions, 945 flow [2022-11-20 11:37:51,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:51,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:51,494 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:51,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-20 11:37:51,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:51,701 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:51,701 INFO L85 PathProgramCache]: Analyzing trace with hash -256688757, now seen corresponding path program 1 times [2022-11-20 11:37:51,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:51,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361723314] [2022-11-20 11:37:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:51,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:51,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361723314] [2022-11-20 11:37:51,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361723314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267258869] [2022-11-20 11:37:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:51,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:51,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:51,976 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:51,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:37:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:37:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:52,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:52,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267258869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:52,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:52,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:37:52,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806752341] [2022-11-20 11:37:52,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:52,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:37:52,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:37:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:37:52,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-11-20 11:37:52,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 373 transitions, 945 flow. Second operand has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:52,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:52,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-11-20 11:37:52,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:53,364 INFO L130 PetriNetUnfolder]: 0/434 cut-off events. [2022-11-20 11:37:53,364 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-11-20 11:37:53,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-20 11:37:53,366 INFO L137 encePairwiseOnDemand]: 431/436 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-11-20 11:37:53,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 392 transitions, 1227 flow [2022-11-20 11:37:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 11:37:53,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-20 11:37:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12531 transitions. [2022-11-20 11:37:53,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7983562691131498 [2022-11-20 11:37:53,378 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12531 transitions. [2022-11-20 11:37:53,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12531 transitions. [2022-11-20 11:37:53,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:53,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12531 transitions. [2022-11-20 11:37:53,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 348.0833333333333) internal successors, (12531), 36 states have internal predecessors, (12531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:53,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:53,413 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:53,413 INFO L175 Difference]: Start difference. First operand has 414 places, 373 transitions, 945 flow. Second operand 36 states and 12531 transitions. [2022-11-20 11:37:53,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 392 transitions, 1227 flow [2022-11-20 11:37:53,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-11-20 11:37:53,422 INFO L231 Difference]: Finished difference. Result has 423 places, 372 transitions, 1000 flow [2022-11-20 11:37:53,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=423, PETRI_TRANSITIONS=372} [2022-11-20 11:37:53,424 INFO L288 CegarLoopForPetriNet]: 389 programPoint places, 34 predicate places. [2022-11-20 11:37:53,424 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 372 transitions, 1000 flow [2022-11-20 11:37:53,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:53,426 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:53,427 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:53,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:53,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:53,633 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1101802981, now seen corresponding path program 1 times [2022-11-20 11:37:53,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:53,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641938697] [2022-11-20 11:37:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:53,674 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:53,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:53,709 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:53,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:53,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:53,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-20 11:37:53,710 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 11:37:53,710 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:53,711 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-11-20 11:37:53,753 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:53,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 418 places, 469 transitions, 1130 flow [2022-11-20 11:37:53,965 INFO L130 PetriNetUnfolder]: 124/932 cut-off events. [2022-11-20 11:37:53,965 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-11-20 11:37:53,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 932 events. 124/932 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3448 event pairs, 0 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 936. Up to 26 conditions per place. [2022-11-20 11:37:53,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 418 places, 469 transitions, 1130 flow [2022-11-20 11:37:54,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 418 places, 469 transitions, 1130 flow [2022-11-20 11:37:54,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:54,002 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:54,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:54,009 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-20 11:37:54,009 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:54,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:54,010 INFO L209 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] [2022-11-20 11:37:54,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:54,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1541268998, now seen corresponding path program 1 times [2022-11-20 11:37:54,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:54,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426435141] [2022-11-20 11:37:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:54,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:54,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:54,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426435141] [2022-11-20 11:37:54,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426435141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:54,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:54,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:54,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695269605] [2022-11-20 11:37:54,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:54,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 380 out of 469 [2022-11-20 11:37:54,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 469 transitions, 1130 flow. Second operand has 2 states, 2 states have (on average 380.5) internal successors, (761), 2 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:54,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 380 of 469 [2022-11-20 11:37:54,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:54,306 INFO L130 PetriNetUnfolder]: 0/795 cut-off events. [2022-11-20 11:37:54,306 INFO L131 PetriNetUnfolder]: For 430/430 co-relation queries the response was YES. [2022-11-20 11:37:54,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 795 events. 0/795 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3126 event pairs, 0 based on Foata normal form. 456/1225 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-20 11:37:54,308 INFO L137 encePairwiseOnDemand]: 393/469 looper letters, 12 selfloop transitions, 0 changer transitions 12/392 dead transitions. [2022-11-20 11:37:54,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 392 transitions, 1000 flow [2022-11-20 11:37:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 848 transitions. [2022-11-20 11:37:54,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9040511727078892 [2022-11-20 11:37:54,310 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 848 transitions. [2022-11-20 11:37:54,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 848 transitions. [2022-11-20 11:37:54,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:54,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 848 transitions. [2022-11-20 11:37:54,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 424.0) internal successors, (848), 2 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 469.0) internal successors, (1407), 3 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,313 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 469.0) internal successors, (1407), 3 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,313 INFO L175 Difference]: Start difference. First operand has 418 places, 469 transitions, 1130 flow. Second operand 2 states and 848 transitions. [2022-11-20 11:37:54,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 392 transitions, 1000 flow [2022-11-20 11:37:54,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 392 transitions, 868 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:54,321 INFO L231 Difference]: Finished difference. Result has 418 places, 380 transitions, 820 flow [2022-11-20 11:37:54,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=820, PETRI_PLACES=418, PETRI_TRANSITIONS=380} [2022-11-20 11:37:54,322 INFO L288 CegarLoopForPetriNet]: 418 programPoint places, 0 predicate places. [2022-11-20 11:37:54,323 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 380 transitions, 820 flow [2022-11-20 11:37:54,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 380.5) internal successors, (761), 2 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:54,323 INFO L209 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] [2022-11-20 11:37:54,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-20 11:37:54,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1247865991, now seen corresponding path program 1 times [2022-11-20 11:37:54,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:54,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070427975] [2022-11-20 11:37:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:54,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:54,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070427975] [2022-11-20 11:37:54,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070427975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:54,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:54,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929084982] [2022-11-20 11:37:54,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:54,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:54,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:54,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:54,352 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 469 [2022-11-20 11:37:54,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 380 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:54,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 469 [2022-11-20 11:37:54,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:54,585 INFO L130 PetriNetUnfolder]: 0/626 cut-off events. [2022-11-20 11:37:54,586 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-20 11:37:54,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 626 events. 0/626 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2051 event pairs, 0 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-20 11:37:54,587 INFO L137 encePairwiseOnDemand]: 466/469 looper letters, 21 selfloop transitions, 2 changer transitions 0/384 dead transitions. [2022-11-20 11:37:54,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 384 transitions, 874 flow [2022-11-20 11:37:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:37:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1143 transitions. [2022-11-20 11:37:54,590 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8123667377398721 [2022-11-20 11:37:54,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1143 transitions. [2022-11-20 11:37:54,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1143 transitions. [2022-11-20 11:37:54,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:54,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1143 transitions. [2022-11-20 11:37:54,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,594 INFO L175 Difference]: Start difference. First operand has 418 places, 380 transitions, 820 flow. Second operand 3 states and 1143 transitions. [2022-11-20 11:37:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 384 transitions, 874 flow [2022-11-20 11:37:54,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 384 transitions, 874 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:54,601 INFO L231 Difference]: Finished difference. Result has 409 places, 381 transitions, 832 flow [2022-11-20 11:37:54,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=832, PETRI_PLACES=409, PETRI_TRANSITIONS=381} [2022-11-20 11:37:54,602 INFO L288 CegarLoopForPetriNet]: 418 programPoint places, -9 predicate places. [2022-11-20 11:37:54,602 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 381 transitions, 832 flow [2022-11-20 11:37:54,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:54,603 INFO L209 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] [2022-11-20 11:37:54,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-11-20 11:37:54,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1954451712, now seen corresponding path program 1 times [2022-11-20 11:37:54,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:54,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243765430] [2022-11-20 11:37:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:54,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:54,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243765430] [2022-11-20 11:37:54,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243765430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:54,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495722953] [2022-11-20 11:37:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:54,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:54,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:54,654 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:54,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 11:37:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:54,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:37:54,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:54,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:54,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495722953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:54,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:54,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:37:54,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161006853] [2022-11-20 11:37:54,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:54,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:37:54,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:54,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:37:54,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:37:54,990 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-11-20 11:37:54,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 381 transitions, 832 flow. Second operand has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:54,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:54,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-11-20 11:37:54,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:55,274 INFO L130 PetriNetUnfolder]: 0/600 cut-off events. [2022-11-20 11:37:55,274 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-20 11:37:55,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 600 events. 0/600 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1901 event pairs, 0 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-20 11:37:55,276 INFO L137 encePairwiseOnDemand]: 463/469 looper letters, 22 selfloop transitions, 9 changer transitions 0/391 dead transitions. [2022-11-20 11:37:55,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 391 transitions, 916 flow [2022-11-20 11:37:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:37:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:37:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3381 transitions. [2022-11-20 11:37:55,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8009950248756219 [2022-11-20 11:37:55,280 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3381 transitions. [2022-11-20 11:37:55,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3381 transitions. [2022-11-20 11:37:55,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:55,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3381 transitions. [2022-11-20 11:37:55,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 375.6666666666667) internal successors, (3381), 9 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:55,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:55,289 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:55,289 INFO L175 Difference]: Start difference. First operand has 409 places, 381 transitions, 832 flow. Second operand 9 states and 3381 transitions. [2022-11-20 11:37:55,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 391 transitions, 916 flow [2022-11-20 11:37:55,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 391 transitions, 914 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:55,296 INFO L231 Difference]: Finished difference. Result has 419 places, 387 transitions, 880 flow [2022-11-20 11:37:55,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=880, PETRI_PLACES=419, PETRI_TRANSITIONS=387} [2022-11-20 11:37:55,297 INFO L288 CegarLoopForPetriNet]: 418 programPoint places, 1 predicate places. [2022-11-20 11:37:55,298 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 387 transitions, 880 flow [2022-11-20 11:37:55,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:55,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:55,299 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:55,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:55,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-20 11:37:55,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1044128309, now seen corresponding path program 1 times [2022-11-20 11:37:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:55,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237290119] [2022-11-20 11:37:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:55,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:55,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237290119] [2022-11-20 11:37:55,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237290119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190724263] [2022-11-20 11:37:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:55,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:55,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:55,615 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:55,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 11:37:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:55,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:37:55,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:55,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:56,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190724263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:56,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:56,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:37:56,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579212813] [2022-11-20 11:37:56,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:56,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:37:56,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:37:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:37:56,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-11-20 11:37:56,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 387 transitions, 880 flow. Second operand has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:56,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:56,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-11-20 11:37:56,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:56,421 INFO L130 PetriNetUnfolder]: 0/548 cut-off events. [2022-11-20 11:37:56,421 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-11-20 11:37:56,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 548 events. 0/548 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1559 event pairs, 0 based on Foata normal form. 4/552 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-20 11:37:56,423 INFO L137 encePairwiseOnDemand]: 463/469 looper letters, 30 selfloop transitions, 21 changer transitions 0/411 dead transitions. [2022-11-20 11:37:56,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 411 transitions, 1090 flow [2022-11-20 11:37:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:37:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:37:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7867 transitions. [2022-11-20 11:37:56,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7987612955630014 [2022-11-20 11:37:56,431 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7867 transitions. [2022-11-20 11:37:56,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7867 transitions. [2022-11-20 11:37:56,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:56,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7867 transitions. [2022-11-20 11:37:56,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 374.6190476190476) internal successors, (7867), 21 states have internal predecessors, (7867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:56,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:56,451 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:56,451 INFO L175 Difference]: Start difference. First operand has 419 places, 387 transitions, 880 flow. Second operand 21 states and 7867 transitions. [2022-11-20 11:37:56,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 411 transitions, 1090 flow [2022-11-20 11:37:56,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 411 transitions, 1076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:37:56,459 INFO L231 Difference]: Finished difference. Result has 443 places, 400 transitions, 1004 flow [2022-11-20 11:37:56,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1004, PETRI_PLACES=443, PETRI_TRANSITIONS=400} [2022-11-20 11:37:56,460 INFO L288 CegarLoopForPetriNet]: 418 programPoint places, 25 predicate places. [2022-11-20 11:37:56,461 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 400 transitions, 1004 flow [2022-11-20 11:37:56,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:56,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:56,462 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:56,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:56,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-20 11:37:56,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1480392363, now seen corresponding path program 1 times [2022-11-20 11:37:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:56,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561015633] [2022-11-20 11:37:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:56,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:56,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:56,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561015633] [2022-11-20 11:37:56,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561015633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:56,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118392985] [2022-11-20 11:37:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:56,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:56,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:56,935 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:56,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 11:37:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:37:57,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:57,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:57,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118392985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:57,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:57,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:37:57,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543506241] [2022-11-20 11:37:57,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:57,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:37:57,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:37:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:37:57,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-11-20 11:37:57,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 400 transitions, 1004 flow. Second operand has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:57,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:57,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-11-20 11:37:57,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:58,577 INFO L130 PetriNetUnfolder]: 0/470 cut-off events. [2022-11-20 11:37:58,577 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-11-20 11:37:58,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-11-20 11:37:58,578 INFO L137 encePairwiseOnDemand]: 464/469 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-11-20 11:37:58,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 424 transitions, 1332 flow [2022-11-20 11:37:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:37:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 11:37:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14590 transitions. [2022-11-20 11:37:58,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7976600513913946 [2022-11-20 11:37:58,589 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14590 transitions. [2022-11-20 11:37:58,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14590 transitions. [2022-11-20 11:37:58,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:58,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14590 transitions. [2022-11-20 11:37:58,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 374.1025641025641) internal successors, (14590), 39 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:58,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:58,624 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:58,625 INFO L175 Difference]: Start difference. First operand has 443 places, 400 transitions, 1004 flow. Second operand 39 states and 14590 transitions. [2022-11-20 11:37:58,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 424 transitions, 1332 flow [2022-11-20 11:37:58,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-20 11:37:58,634 INFO L231 Difference]: Finished difference. Result has 455 places, 402 transitions, 1083 flow [2022-11-20 11:37:58,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=455, PETRI_TRANSITIONS=402} [2022-11-20 11:37:58,635 INFO L288 CegarLoopForPetriNet]: 418 programPoint places, 37 predicate places. [2022-11-20 11:37:58,636 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 402 transitions, 1083 flow [2022-11-20 11:37:58,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:58,639 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:58,639 INFO L209 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:58,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:58,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-20 11:37:58,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:58,846 INFO L85 PathProgramCache]: Analyzing trace with hash 176240361, now seen corresponding path program 1 times [2022-11-20 11:37:58,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:58,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203135897] [2022-11-20 11:37:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:58,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:58,877 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:37:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:37:58,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:37:58,921 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:37:58,921 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:37:58,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:37:58,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-11-20 11:37:58,921 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 11:37:58,922 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:37:58,922 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-11-20 11:37:58,970 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:37:58,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 447 places, 502 transitions, 1225 flow [2022-11-20 11:37:59,312 INFO L130 PetriNetUnfolder]: 134/1004 cut-off events. [2022-11-20 11:37:59,312 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-11-20 11:37:59,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 1004 events. 134/1004 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3709 event pairs, 0 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 1021. Up to 28 conditions per place. [2022-11-20 11:37:59,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 447 places, 502 transitions, 1225 flow [2022-11-20 11:37:59,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 447 places, 502 transitions, 1225 flow [2022-11-20 11:37:59,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:59,348 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:59,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:37:59,355 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-20 11:37:59,356 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:37:59,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:59,356 INFO L209 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] [2022-11-20 11:37:59,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash -124413626, now seen corresponding path program 1 times [2022-11-20 11:37:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:59,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22008318] [2022-11-20 11:37:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:59,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:59,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22008318] [2022-11-20 11:37:59,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22008318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:59,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:59,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:59,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795183600] [2022-11-20 11:37:59,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:59,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:59,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 406 out of 502 [2022-11-20 11:37:59,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 502 transitions, 1225 flow. Second operand has 2 states, 2 states have (on average 406.5) internal successors, (813), 2 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:59,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:59,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 406 of 502 [2022-11-20 11:37:59,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:37:59,697 INFO L130 PetriNetUnfolder]: 0/856 cut-off events. [2022-11-20 11:37:59,698 INFO L131 PetriNetUnfolder]: For 533/533 co-relation queries the response was YES. [2022-11-20 11:37:59,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 856 events. 0/856 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3462 event pairs, 0 based on Foata normal form. 532/1360 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2022-11-20 11:37:59,699 INFO L137 encePairwiseOnDemand]: 420/502 looper letters, 13 selfloop transitions, 0 changer transitions 12/419 dead transitions. [2022-11-20 11:37:59,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 419 transitions, 1085 flow [2022-11-20 11:37:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:37:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 907 transitions. [2022-11-20 11:37:59,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9033864541832669 [2022-11-20 11:37:59,702 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 907 transitions. [2022-11-20 11:37:59,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 907 transitions. [2022-11-20 11:37:59,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:37:59,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 907 transitions. [2022-11-20 11:37:59,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 453.5) internal successors, (907), 2 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:59,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:59,704 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:59,705 INFO L175 Difference]: Start difference. First operand has 447 places, 502 transitions, 1225 flow. Second operand 2 states and 907 transitions. [2022-11-20 11:37:59,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 419 transitions, 1085 flow [2022-11-20 11:37:59,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 419 transitions, 929 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-11-20 11:37:59,715 INFO L231 Difference]: Finished difference. Result has 447 places, 407 transitions, 879 flow [2022-11-20 11:37:59,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=879, PETRI_PLACES=447, PETRI_TRANSITIONS=407} [2022-11-20 11:37:59,716 INFO L288 CegarLoopForPetriNet]: 447 programPoint places, 0 predicate places. [2022-11-20 11:37:59,716 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 407 transitions, 879 flow [2022-11-20 11:37:59,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 406.5) internal successors, (813), 2 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:59,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:37:59,717 INFO L209 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] [2022-11-20 11:37:59,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-11-20 11:37:59,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:37:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:59,718 INFO L85 PathProgramCache]: Analyzing trace with hash -417816633, now seen corresponding path program 1 times [2022-11-20 11:37:59,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:59,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874857641] [2022-11-20 11:37:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:59,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:59,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:59,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874857641] [2022-11-20 11:37:59,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874857641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:59,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:59,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:59,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915083316] [2022-11-20 11:37:59,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:59,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:59,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:59,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:59,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 502 [2022-11-20 11:37:59,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 407 transitions, 879 flow. Second operand has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:59,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:37:59,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 502 [2022-11-20 11:37:59,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:00,031 INFO L130 PetriNetUnfolder]: 0/675 cut-off events. [2022-11-20 11:38:00,031 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-20 11:38:00,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 675 events. 0/675 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2241 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-20 11:38:00,034 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 22 selfloop transitions, 2 changer transitions 0/411 dead transitions. [2022-11-20 11:38:00,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 411 transitions, 935 flow [2022-11-20 11:38:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:38:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:38:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1222 transitions. [2022-11-20 11:38:00,036 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8114209827357237 [2022-11-20 11:38:00,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1222 transitions. [2022-11-20 11:38:00,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1222 transitions. [2022-11-20 11:38:00,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:00,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1222 transitions. [2022-11-20 11:38:00,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 407.3333333333333) internal successors, (1222), 3 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:00,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:00,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:00,040 INFO L175 Difference]: Start difference. First operand has 447 places, 407 transitions, 879 flow. Second operand 3 states and 1222 transitions. [2022-11-20 11:38:00,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 411 transitions, 935 flow [2022-11-20 11:38:00,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 411 transitions, 935 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:00,047 INFO L231 Difference]: Finished difference. Result has 438 places, 408 transitions, 891 flow [2022-11-20 11:38:00,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=891, PETRI_PLACES=438, PETRI_TRANSITIONS=408} [2022-11-20 11:38:00,047 INFO L288 CegarLoopForPetriNet]: 447 programPoint places, -9 predicate places. [2022-11-20 11:38:00,047 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 408 transitions, 891 flow [2022-11-20 11:38:00,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:00,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:00,048 INFO L209 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] [2022-11-20 11:38:00,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-20 11:38:00,049 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1901634592, now seen corresponding path program 1 times [2022-11-20 11:38:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:00,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588403240] [2022-11-20 11:38:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:00,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:00,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588403240] [2022-11-20 11:38:00,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588403240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:00,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41621209] [2022-11-20 11:38:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:00,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:00,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:00,097 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:00,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 11:38:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:38:00,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:00,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:00,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41621209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:00,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:00,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:38:00,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097786420] [2022-11-20 11:38:00,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:00,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:38:00,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:00,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:38:00,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:38:00,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-11-20 11:38:00,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 408 transitions, 891 flow. Second operand has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:00,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:00,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-11-20 11:38:00,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:00,820 INFO L130 PetriNetUnfolder]: 0/649 cut-off events. [2022-11-20 11:38:00,820 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-20 11:38:00,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 649 events. 0/649 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2085 event pairs, 0 based on Foata normal form. 2/651 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-20 11:38:00,823 INFO L137 encePairwiseOnDemand]: 496/502 looper letters, 23 selfloop transitions, 9 changer transitions 0/418 dead transitions. [2022-11-20 11:38:00,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 418 transitions, 977 flow [2022-11-20 11:38:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:38:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:38:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3616 transitions. [2022-11-20 11:38:00,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8003541389995573 [2022-11-20 11:38:00,876 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3616 transitions. [2022-11-20 11:38:00,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3616 transitions. [2022-11-20 11:38:00,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:00,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3616 transitions. [2022-11-20 11:38:00,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 401.77777777777777) internal successors, (3616), 9 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:00,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:00,888 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:00,888 INFO L175 Difference]: Start difference. First operand has 438 places, 408 transitions, 891 flow. Second operand 9 states and 3616 transitions. [2022-11-20 11:38:00,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 418 transitions, 977 flow [2022-11-20 11:38:00,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 418 transitions, 975 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:00,896 INFO L231 Difference]: Finished difference. Result has 448 places, 414 transitions, 939 flow [2022-11-20 11:38:00,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=939, PETRI_PLACES=448, PETRI_TRANSITIONS=414} [2022-11-20 11:38:00,897 INFO L288 CegarLoopForPetriNet]: 447 programPoint places, 1 predicate places. [2022-11-20 11:38:00,897 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 414 transitions, 939 flow [2022-11-20 11:38:00,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:00,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:00,899 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:00,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-20 11:38:01,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-11-20 11:38:01,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:01,105 INFO L85 PathProgramCache]: Analyzing trace with hash -171060459, now seen corresponding path program 1 times [2022-11-20 11:38:01,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:01,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256757028] [2022-11-20 11:38:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:01,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:01,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256757028] [2022-11-20 11:38:01,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256757028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:01,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507347888] [2022-11-20 11:38:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:01,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:01,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:01,212 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:01,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 11:38:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:38:01,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:01,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:01,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507347888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:01,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:01,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:38:01,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912488237] [2022-11-20 11:38:01,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:01,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:38:01,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:38:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:38:01,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-11-20 11:38:01,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 414 transitions, 939 flow. Second operand has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:01,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:01,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-11-20 11:38:01,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:02,189 INFO L130 PetriNetUnfolder]: 0/597 cut-off events. [2022-11-20 11:38:02,189 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-20 11:38:02,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 597 events. 0/597 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1737 event pairs, 0 based on Foata normal form. 4/601 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-20 11:38:02,190 INFO L137 encePairwiseOnDemand]: 496/502 looper letters, 31 selfloop transitions, 21 changer transitions 0/438 dead transitions. [2022-11-20 11:38:02,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 438 transitions, 1151 flow [2022-11-20 11:38:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:38:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:38:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8414 transitions. [2022-11-20 11:38:02,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.798140770252324 [2022-11-20 11:38:02,210 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8414 transitions. [2022-11-20 11:38:02,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8414 transitions. [2022-11-20 11:38:02,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:02,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8414 transitions. [2022-11-20 11:38:02,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 400.6666666666667) internal successors, (8414), 21 states have internal predecessors, (8414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:02,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:02,232 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:02,232 INFO L175 Difference]: Start difference. First operand has 448 places, 414 transitions, 939 flow. Second operand 21 states and 8414 transitions. [2022-11-20 11:38:02,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 438 transitions, 1151 flow [2022-11-20 11:38:02,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 438 transitions, 1137 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:02,242 INFO L231 Difference]: Finished difference. Result has 472 places, 427 transitions, 1063 flow [2022-11-20 11:38:02,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1063, PETRI_PLACES=472, PETRI_TRANSITIONS=427} [2022-11-20 11:38:02,243 INFO L288 CegarLoopForPetriNet]: 447 programPoint places, 25 predicate places. [2022-11-20 11:38:02,243 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 427 transitions, 1063 flow [2022-11-20 11:38:02,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:02,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:02,245 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:02,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:02,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:02,452 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:02,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:02,452 INFO L85 PathProgramCache]: Analyzing trace with hash 767133451, now seen corresponding path program 1 times [2022-11-20 11:38:02,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:02,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564752378] [2022-11-20 11:38:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:02,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:02,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:02,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564752378] [2022-11-20 11:38:02,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564752378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:02,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465124486] [2022-11-20 11:38:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:02,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:02,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:02,722 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:02,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 11:38:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:03,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:38:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:03,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:03,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465124486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:03,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:03,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:38:03,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142513697] [2022-11-20 11:38:03,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:03,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:38:03,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:38:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:38:03,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-11-20 11:38:03,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 427 transitions, 1063 flow. Second operand has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:03,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:03,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-11-20 11:38:03,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:04,374 INFO L130 PetriNetUnfolder]: 0/506 cut-off events. [2022-11-20 11:38:04,375 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-11-20 11:38:04,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-20 11:38:04,376 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-11-20 11:38:04,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 456 transitions, 1437 flow [2022-11-20 11:38:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 11:38:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-20 11:38:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16805 transitions. [2022-11-20 11:38:04,385 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7970498956554734 [2022-11-20 11:38:04,385 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16805 transitions. [2022-11-20 11:38:04,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16805 transitions. [2022-11-20 11:38:04,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:04,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16805 transitions. [2022-11-20 11:38:04,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 400.1190476190476) internal successors, (16805), 42 states have internal predecessors, (16805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:04,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:04,424 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:04,424 INFO L175 Difference]: Start difference. First operand has 472 places, 427 transitions, 1063 flow. Second operand 42 states and 16805 transitions. [2022-11-20 11:38:04,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 456 transitions, 1437 flow [2022-11-20 11:38:04,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-11-20 11:38:04,433 INFO L231 Difference]: Finished difference. Result has 487 places, 432 transitions, 1166 flow [2022-11-20 11:38:04,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=487, PETRI_TRANSITIONS=432} [2022-11-20 11:38:04,434 INFO L288 CegarLoopForPetriNet]: 447 programPoint places, 40 predicate places. [2022-11-20 11:38:04,434 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 432 transitions, 1166 flow [2022-11-20 11:38:04,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:04,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:04,437 INFO L209 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:04,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:04,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:04,644 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:04,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:04,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1834102098, now seen corresponding path program 1 times [2022-11-20 11:38:04,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:04,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600357219] [2022-11-20 11:38:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:04,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:04,690 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:38:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:04,750 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:38:04,751 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:38:04,751 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:38:04,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:38:04,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-11-20 11:38:04,751 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 11:38:04,752 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:38:04,752 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-11-20 11:38:04,808 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:38:04,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 476 places, 535 transitions, 1322 flow [2022-11-20 11:38:05,147 INFO L130 PetriNetUnfolder]: 144/1076 cut-off events. [2022-11-20 11:38:05,148 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-11-20 11:38:05,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 1076 events. 144/1076 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4002 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 1107. Up to 30 conditions per place. [2022-11-20 11:38:05,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 535 transitions, 1322 flow [2022-11-20 11:38:05,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 476 places, 535 transitions, 1322 flow [2022-11-20 11:38:05,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:38:05,220 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:38:05,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:38:05,226 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-20 11:38:05,227 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:38:05,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:05,227 INFO L209 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] [2022-11-20 11:38:05,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:05,228 INFO L85 PathProgramCache]: Analyzing trace with hash -51559578, now seen corresponding path program 1 times [2022-11-20 11:38:05,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:05,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137718273] [2022-11-20 11:38:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:05,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:05,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:05,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137718273] [2022-11-20 11:38:05,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137718273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:05,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:05,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:38:05,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275094576] [2022-11-20 11:38:05,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:05,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:38:05,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:05,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:38:05,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:38:05,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 432 out of 535 [2022-11-20 11:38:05,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 535 transitions, 1322 flow. Second operand has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:05,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 432 of 535 [2022-11-20 11:38:05,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:05,694 INFO L130 PetriNetUnfolder]: 0/917 cut-off events. [2022-11-20 11:38:05,695 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-11-20 11:38:05,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 917 events. 0/917 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3663 event pairs, 0 based on Foata normal form. 614/1501 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 11:38:05,697 INFO L137 encePairwiseOnDemand]: 447/535 looper letters, 14 selfloop transitions, 0 changer transitions 12/446 dead transitions. [2022-11-20 11:38:05,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 446 transitions, 1172 flow [2022-11-20 11:38:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:38:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:38:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 966 transitions. [2022-11-20 11:38:05,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.902803738317757 [2022-11-20 11:38:05,700 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 966 transitions. [2022-11-20 11:38:05,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 966 transitions. [2022-11-20 11:38:05,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:05,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 966 transitions. [2022-11-20 11:38:05,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 483.0) internal successors, (966), 2 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,704 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,704 INFO L175 Difference]: Start difference. First operand has 476 places, 535 transitions, 1322 flow. Second operand 2 states and 966 transitions. [2022-11-20 11:38:05,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 446 transitions, 1172 flow [2022-11-20 11:38:05,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 446 transitions, 990 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:05,715 INFO L231 Difference]: Finished difference. Result has 476 places, 434 transitions, 938 flow [2022-11-20 11:38:05,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=938, PETRI_PLACES=476, PETRI_TRANSITIONS=434} [2022-11-20 11:38:05,716 INFO L288 CegarLoopForPetriNet]: 476 programPoint places, 0 predicate places. [2022-11-20 11:38:05,716 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 434 transitions, 938 flow [2022-11-20 11:38:05,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:05,717 INFO L209 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] [2022-11-20 11:38:05,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-11-20 11:38:05,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash -344962585, now seen corresponding path program 1 times [2022-11-20 11:38:05,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514393548] [2022-11-20 11:38:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:05,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:05,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:05,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514393548] [2022-11-20 11:38:05,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514393548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:05,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:05,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:38:05,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426161262] [2022-11-20 11:38:05,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:05,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:38:05,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:05,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:38:05,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:38:05,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 535 [2022-11-20 11:38:05,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 434 transitions, 938 flow. Second operand has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:05,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:05,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 535 [2022-11-20 11:38:05,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:06,090 INFO L130 PetriNetUnfolder]: 0/724 cut-off events. [2022-11-20 11:38:06,091 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 11:38:06,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 724 events. 0/724 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2417 event pairs, 0 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-11-20 11:38:06,092 INFO L137 encePairwiseOnDemand]: 532/535 looper letters, 23 selfloop transitions, 2 changer transitions 0/438 dead transitions. [2022-11-20 11:38:06,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 438 transitions, 996 flow [2022-11-20 11:38:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:38:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:38:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1301 transitions. [2022-11-20 11:38:06,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8105919003115265 [2022-11-20 11:38:06,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1301 transitions. [2022-11-20 11:38:06,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1301 transitions. [2022-11-20 11:38:06,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:06,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1301 transitions. [2022-11-20 11:38:06,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 433.6666666666667) internal successors, (1301), 3 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:06,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:06,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:06,096 INFO L175 Difference]: Start difference. First operand has 476 places, 434 transitions, 938 flow. Second operand 3 states and 1301 transitions. [2022-11-20 11:38:06,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 438 transitions, 996 flow [2022-11-20 11:38:06,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 438 transitions, 996 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:06,100 INFO L231 Difference]: Finished difference. Result has 467 places, 435 transitions, 950 flow [2022-11-20 11:38:06,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=950, PETRI_PLACES=467, PETRI_TRANSITIONS=435} [2022-11-20 11:38:06,101 INFO L288 CegarLoopForPetriNet]: 476 programPoint places, -9 predicate places. [2022-11-20 11:38:06,101 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 435 transitions, 950 flow [2022-11-20 11:38:06,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:06,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:06,102 INFO L209 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] [2022-11-20 11:38:06,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-11-20 11:38:06,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:06,103 INFO L85 PathProgramCache]: Analyzing trace with hash 438271168, now seen corresponding path program 1 times [2022-11-20 11:38:06,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:06,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780235924] [2022-11-20 11:38:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:06,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:06,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780235924] [2022-11-20 11:38:06,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780235924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229726097] [2022-11-20 11:38:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:06,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:06,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:06,154 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:06,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 11:38:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:06,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:38:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:06,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:06,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229726097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:06,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:06,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:38:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116265908] [2022-11-20 11:38:06,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:06,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:38:06,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:06,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:38:06,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:38:06,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-11-20 11:38:06,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 435 transitions, 950 flow. Second operand has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:06,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:06,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-11-20 11:38:06,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:06,813 INFO L130 PetriNetUnfolder]: 0/698 cut-off events. [2022-11-20 11:38:06,813 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 11:38:06,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 698 events. 0/698 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2266 event pairs, 0 based on Foata normal form. 2/700 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-20 11:38:06,815 INFO L137 encePairwiseOnDemand]: 529/535 looper letters, 24 selfloop transitions, 9 changer transitions 0/445 dead transitions. [2022-11-20 11:38:06,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 445 transitions, 1038 flow [2022-11-20 11:38:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:38:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:38:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3851 transitions. [2022-11-20 11:38:06,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7997923156801662 [2022-11-20 11:38:06,819 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3851 transitions. [2022-11-20 11:38:06,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3851 transitions. [2022-11-20 11:38:06,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:06,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3851 transitions. [2022-11-20 11:38:06,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 427.8888888888889) internal successors, (3851), 9 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:06,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:06,826 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:06,826 INFO L175 Difference]: Start difference. First operand has 467 places, 435 transitions, 950 flow. Second operand 9 states and 3851 transitions. [2022-11-20 11:38:06,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 445 transitions, 1038 flow [2022-11-20 11:38:06,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 445 transitions, 1036 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:06,834 INFO L231 Difference]: Finished difference. Result has 477 places, 441 transitions, 998 flow [2022-11-20 11:38:06,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=998, PETRI_PLACES=477, PETRI_TRANSITIONS=441} [2022-11-20 11:38:06,835 INFO L288 CegarLoopForPetriNet]: 476 programPoint places, 1 predicate places. [2022-11-20 11:38:06,835 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 441 transitions, 998 flow [2022-11-20 11:38:06,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:06,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:06,837 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:06,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:07,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-20 11:38:07,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:07,044 INFO L85 PathProgramCache]: Analyzing trace with hash 776120501, now seen corresponding path program 1 times [2022-11-20 11:38:07,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:07,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223076059] [2022-11-20 11:38:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:07,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:07,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:07,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223076059] [2022-11-20 11:38:07,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223076059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:07,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453432401] [2022-11-20 11:38:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:07,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:07,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:07,145 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:07,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 11:38:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:07,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:38:07,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:07,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:07,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453432401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:07,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:07,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:38:07,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209620405] [2022-11-20 11:38:07,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:07,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:38:07,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:38:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:38:07,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-11-20 11:38:07,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 441 transitions, 998 flow. Second operand has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:07,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:07,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-11-20 11:38:07,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:08,236 INFO L130 PetriNetUnfolder]: 0/646 cut-off events. [2022-11-20 11:38:08,237 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-11-20 11:38:08,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 646 events. 0/646 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1925 event pairs, 0 based on Foata normal form. 4/650 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-20 11:38:08,238 INFO L137 encePairwiseOnDemand]: 529/535 looper letters, 32 selfloop transitions, 21 changer transitions 0/465 dead transitions. [2022-11-20 11:38:08,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 465 transitions, 1212 flow [2022-11-20 11:38:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:38:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:38:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8961 transitions. [2022-11-20 11:38:08,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7975967957276369 [2022-11-20 11:38:08,245 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8961 transitions. [2022-11-20 11:38:08,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8961 transitions. [2022-11-20 11:38:08,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:08,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8961 transitions. [2022-11-20 11:38:08,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 426.7142857142857) internal successors, (8961), 21 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:08,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:08,266 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:08,266 INFO L175 Difference]: Start difference. First operand has 477 places, 441 transitions, 998 flow. Second operand 21 states and 8961 transitions. [2022-11-20 11:38:08,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 465 transitions, 1212 flow [2022-11-20 11:38:08,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 465 transitions, 1198 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:08,275 INFO L231 Difference]: Finished difference. Result has 501 places, 454 transitions, 1122 flow [2022-11-20 11:38:08,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1122, PETRI_PLACES=501, PETRI_TRANSITIONS=454} [2022-11-20 11:38:08,276 INFO L288 CegarLoopForPetriNet]: 476 programPoint places, 25 predicate places. [2022-11-20 11:38:08,276 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 454 transitions, 1122 flow [2022-11-20 11:38:08,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:08,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:08,278 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:08,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:08,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:08,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1898501803, now seen corresponding path program 1 times [2022-11-20 11:38:08,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:08,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548118169] [2022-11-20 11:38:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:08,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:08,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:08,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548118169] [2022-11-20 11:38:08,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548118169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:08,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961293541] [2022-11-20 11:38:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:08,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:08,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:08,752 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:08,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 11:38:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:09,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:38:09,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:09,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:09,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961293541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:09,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:09,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:38:09,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682343896] [2022-11-20 11:38:09,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:09,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:38:09,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:38:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:38:09,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-11-20 11:38:09,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 454 transitions, 1122 flow. Second operand has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:09,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:09,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-11-20 11:38:09,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:10,366 INFO L130 PetriNetUnfolder]: 0/542 cut-off events. [2022-11-20 11:38:10,367 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-20 11:38:10,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-11-20 11:38:10,368 INFO L137 encePairwiseOnDemand]: 530/535 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-11-20 11:38:10,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 488 transitions, 1542 flow [2022-11-20 11:38:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:38:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:38:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19176 transitions. [2022-11-20 11:38:10,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7965109034267913 [2022-11-20 11:38:10,427 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19176 transitions. [2022-11-20 11:38:10,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19176 transitions. [2022-11-20 11:38:10,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:10,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19176 transitions. [2022-11-20 11:38:10,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 426.1333333333333) internal successors, (19176), 45 states have internal predecessors, (19176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:10,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:10,457 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:10,457 INFO L175 Difference]: Start difference. First operand has 501 places, 454 transitions, 1122 flow. Second operand 45 states and 19176 transitions. [2022-11-20 11:38:10,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 488 transitions, 1542 flow [2022-11-20 11:38:10,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-11-20 11:38:10,463 INFO L231 Difference]: Finished difference. Result has 519 places, 462 transitions, 1249 flow [2022-11-20 11:38:10,464 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=519, PETRI_TRANSITIONS=462} [2022-11-20 11:38:10,464 INFO L288 CegarLoopForPetriNet]: 476 programPoint places, 43 predicate places. [2022-11-20 11:38:10,464 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 462 transitions, 1249 flow [2022-11-20 11:38:10,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:10,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:10,466 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:10,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-20 11:38:10,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:10,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:10,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1167770068, now seen corresponding path program 1 times [2022-11-20 11:38:10,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:10,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260562836] [2022-11-20 11:38:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:10,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:10,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:38:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:10,741 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:38:10,741 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:38:10,742 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:38:10,742 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:38:10,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-11-20 11:38:10,742 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 11:38:10,743 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:38:10,743 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-11-20 11:38:10,789 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:38:10,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 505 places, 568 transitions, 1421 flow [2022-11-20 11:38:11,070 INFO L130 PetriNetUnfolder]: 154/1148 cut-off events. [2022-11-20 11:38:11,070 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-11-20 11:38:11,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 1148 events. 154/1148 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4298 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1196. Up to 32 conditions per place. [2022-11-20 11:38:11,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 505 places, 568 transitions, 1421 flow [2022-11-20 11:38:11,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 505 places, 568 transitions, 1421 flow [2022-11-20 11:38:11,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:38:11,117 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:38:11,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:38:11,121 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-20 11:38:11,121 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:38:11,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:11,121 INFO L209 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] [2022-11-20 11:38:11,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1759831142, now seen corresponding path program 1 times [2022-11-20 11:38:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:11,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868472837] [2022-11-20 11:38:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:11,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:11,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:11,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868472837] [2022-11-20 11:38:11,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868472837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:11,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:11,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:38:11,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869176623] [2022-11-20 11:38:11,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:11,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:38:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:38:11,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:38:11,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 458 out of 568 [2022-11-20 11:38:11,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 568 transitions, 1421 flow. Second operand has 2 states, 2 states have (on average 458.5) internal successors, (917), 2 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:11,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 458 of 568 [2022-11-20 11:38:11,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:11,426 INFO L130 PetriNetUnfolder]: 0/978 cut-off events. [2022-11-20 11:38:11,426 INFO L131 PetriNetUnfolder]: For 785/785 co-relation queries the response was YES. [2022-11-20 11:38:11,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 978 events. 0/978 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3932 event pairs, 0 based on Foata normal form. 702/1648 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2022-11-20 11:38:11,427 INFO L137 encePairwiseOnDemand]: 474/568 looper letters, 15 selfloop transitions, 0 changer transitions 12/473 dead transitions. [2022-11-20 11:38:11,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 473 transitions, 1261 flow [2022-11-20 11:38:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:38:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:38:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1025 transitions. [2022-11-20 11:38:11,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9022887323943662 [2022-11-20 11:38:11,429 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1025 transitions. [2022-11-20 11:38:11,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1025 transitions. [2022-11-20 11:38:11,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:11,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1025 transitions. [2022-11-20 11:38:11,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 512.5) internal successors, (1025), 2 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 568.0) internal successors, (1704), 3 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,431 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 568.0) internal successors, (1704), 3 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,431 INFO L175 Difference]: Start difference. First operand has 505 places, 568 transitions, 1421 flow. Second operand 2 states and 1025 transitions. [2022-11-20 11:38:11,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 473 transitions, 1261 flow [2022-11-20 11:38:11,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 473 transitions, 1051 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:11,436 INFO L231 Difference]: Finished difference. Result has 505 places, 461 transitions, 997 flow [2022-11-20 11:38:11,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=997, PETRI_PLACES=505, PETRI_TRANSITIONS=461} [2022-11-20 11:38:11,437 INFO L288 CegarLoopForPetriNet]: 505 programPoint places, 0 predicate places. [2022-11-20 11:38:11,437 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 461 transitions, 997 flow [2022-11-20 11:38:11,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 458.5) internal successors, (917), 2 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:11,438 INFO L209 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] [2022-11-20 11:38:11,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-11-20 11:38:11,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:11,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1466428135, now seen corresponding path program 1 times [2022-11-20 11:38:11,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:11,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584028173] [2022-11-20 11:38:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:11,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:11,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584028173] [2022-11-20 11:38:11,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584028173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:11,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:11,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:38:11,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83756259] [2022-11-20 11:38:11,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:11,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:38:11,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:11,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:38:11,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:38:11,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 451 out of 568 [2022-11-20 11:38:11,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 461 transitions, 997 flow. Second operand has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:11,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 451 of 568 [2022-11-20 11:38:11,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:11,756 INFO L130 PetriNetUnfolder]: 0/773 cut-off events. [2022-11-20 11:38:11,756 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-20 11:38:11,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930 conditions, 773 events. 0/773 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2599 event pairs, 0 based on Foata normal form. 0/758 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-11-20 11:38:11,758 INFO L137 encePairwiseOnDemand]: 565/568 looper letters, 24 selfloop transitions, 2 changer transitions 0/465 dead transitions. [2022-11-20 11:38:11,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 465 transitions, 1057 flow [2022-11-20 11:38:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:38:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:38:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1380 transitions. [2022-11-20 11:38:11,760 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8098591549295775 [2022-11-20 11:38:11,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1380 transitions. [2022-11-20 11:38:11,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1380 transitions. [2022-11-20 11:38:11,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:11,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1380 transitions. [2022-11-20 11:38:11,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 460.0) internal successors, (1380), 3 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,764 INFO L175 Difference]: Start difference. First operand has 505 places, 461 transitions, 997 flow. Second operand 3 states and 1380 transitions. [2022-11-20 11:38:11,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 465 transitions, 1057 flow [2022-11-20 11:38:11,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 465 transitions, 1057 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:11,772 INFO L231 Difference]: Finished difference. Result has 496 places, 462 transitions, 1009 flow [2022-11-20 11:38:11,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1009, PETRI_PLACES=496, PETRI_TRANSITIONS=462} [2022-11-20 11:38:11,773 INFO L288 CegarLoopForPetriNet]: 505 programPoint places, -9 predicate places. [2022-11-20 11:38:11,773 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 462 transitions, 1009 flow [2022-11-20 11:38:11,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:11,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:11,774 INFO L209 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] [2022-11-20 11:38:11,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-11-20 11:38:11,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:11,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2049574688, now seen corresponding path program 1 times [2022-11-20 11:38:11,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:11,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715697989] [2022-11-20 11:38:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:11,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:11,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:11,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715697989] [2022-11-20 11:38:11,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715697989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:11,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827853194] [2022-11-20 11:38:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:11,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:11,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:11,826 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:11,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 11:38:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:38:12,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:12,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:12,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827853194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:12,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:12,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:38:12,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466945947] [2022-11-20 11:38:12,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:12,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:38:12,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:38:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:38:12,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-11-20 11:38:12,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 462 transitions, 1009 flow. Second operand has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:12,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:12,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-11-20 11:38:12,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:12,616 INFO L130 PetriNetUnfolder]: 0/747 cut-off events. [2022-11-20 11:38:12,616 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 11:38:12,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 747 events. 0/747 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2450 event pairs, 0 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-11-20 11:38:12,617 INFO L137 encePairwiseOnDemand]: 562/568 looper letters, 25 selfloop transitions, 9 changer transitions 0/472 dead transitions. [2022-11-20 11:38:12,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 472 transitions, 1099 flow [2022-11-20 11:38:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:38:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:38:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4086 transitions. [2022-11-20 11:38:12,621 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7992957746478874 [2022-11-20 11:38:12,621 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4086 transitions. [2022-11-20 11:38:12,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4086 transitions. [2022-11-20 11:38:12,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:12,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4086 transitions. [2022-11-20 11:38:12,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 454.0) internal successors, (4086), 9 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:12,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:12,627 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:12,627 INFO L175 Difference]: Start difference. First operand has 496 places, 462 transitions, 1009 flow. Second operand 9 states and 4086 transitions. [2022-11-20 11:38:12,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 472 transitions, 1099 flow [2022-11-20 11:38:12,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 472 transitions, 1097 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:12,633 INFO L231 Difference]: Finished difference. Result has 506 places, 468 transitions, 1057 flow [2022-11-20 11:38:12,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1057, PETRI_PLACES=506, PETRI_TRANSITIONS=468} [2022-11-20 11:38:12,634 INFO L288 CegarLoopForPetriNet]: 505 programPoint places, 1 predicate places. [2022-11-20 11:38:12,634 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 468 transitions, 1057 flow [2022-11-20 11:38:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:12,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:12,635 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:12,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:12,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-11-20 11:38:12,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash -409296107, now seen corresponding path program 1 times [2022-11-20 11:38:12,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:12,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793205696] [2022-11-20 11:38:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:12,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:12,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793205696] [2022-11-20 11:38:12,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793205696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759214040] [2022-11-20 11:38:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:12,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:12,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:12,923 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:12,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 11:38:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:13,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:38:13,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:13,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:13,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759214040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:13,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:13,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:38:13,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470474774] [2022-11-20 11:38:13,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:13,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:38:13,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:13,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:38:13,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:38:13,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-11-20 11:38:13,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 468 transitions, 1057 flow. Second operand has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:13,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:13,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-11-20 11:38:13,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:14,047 INFO L130 PetriNetUnfolder]: 0/695 cut-off events. [2022-11-20 11:38:14,047 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-11-20 11:38:14,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 695 events. 0/695 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2108 event pairs, 0 based on Foata normal form. 4/699 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-20 11:38:14,049 INFO L137 encePairwiseOnDemand]: 562/568 looper letters, 33 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2022-11-20 11:38:14,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 492 transitions, 1273 flow [2022-11-20 11:38:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:38:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:38:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9508 transitions. [2022-11-20 11:38:14,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7971160295103957 [2022-11-20 11:38:14,058 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9508 transitions. [2022-11-20 11:38:14,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9508 transitions. [2022-11-20 11:38:14,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:14,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9508 transitions. [2022-11-20 11:38:14,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 452.76190476190476) internal successors, (9508), 21 states have internal predecessors, (9508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:14,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:14,081 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:14,081 INFO L175 Difference]: Start difference. First operand has 506 places, 468 transitions, 1057 flow. Second operand 21 states and 9508 transitions. [2022-11-20 11:38:14,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 492 transitions, 1273 flow [2022-11-20 11:38:14,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 492 transitions, 1259 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:14,089 INFO L231 Difference]: Finished difference. Result has 530 places, 481 transitions, 1181 flow [2022-11-20 11:38:14,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1181, PETRI_PLACES=530, PETRI_TRANSITIONS=481} [2022-11-20 11:38:14,090 INFO L288 CegarLoopForPetriNet]: 505 programPoint places, 25 predicate places. [2022-11-20 11:38:14,090 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 481 transitions, 1181 flow [2022-11-20 11:38:14,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:14,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:14,091 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:14,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-20 11:38:14,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-11-20 11:38:14,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash 579530123, now seen corresponding path program 1 times [2022-11-20 11:38:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:14,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186545101] [2022-11-20 11:38:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:14,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:14,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:14,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186545101] [2022-11-20 11:38:14,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186545101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:14,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131884466] [2022-11-20 11:38:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:14,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:14,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:14,560 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:14,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 11:38:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:38:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:15,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:15,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131884466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:15,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:15,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:38:15,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069011057] [2022-11-20 11:38:15,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:15,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:38:15,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:15,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:38:15,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:38:15,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-11-20 11:38:15,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 481 transitions, 1181 flow. Second operand has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:15,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:15,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-11-20 11:38:15,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:16,272 INFO L130 PetriNetUnfolder]: 0/591 cut-off events. [2022-11-20 11:38:16,272 INFO L131 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-11-20 11:38:16,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 591 events. 0/591 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1423 event pairs, 0 based on Foata normal form. 8/599 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-20 11:38:16,274 INFO L137 encePairwiseOnDemand]: 562/568 looper letters, 49 selfloop transitions, 45 changer transitions 0/532 dead transitions. [2022-11-20 11:38:16,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 532 transitions, 1685 flow [2022-11-20 11:38:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:38:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:38:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20352 transitions. [2022-11-20 11:38:16,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7962441314553991 [2022-11-20 11:38:16,285 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20352 transitions. [2022-11-20 11:38:16,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20352 transitions. [2022-11-20 11:38:16,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:16,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20352 transitions. [2022-11-20 11:38:16,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 452.26666666666665) internal successors, (20352), 45 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:16,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:16,315 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:16,315 INFO L175 Difference]: Start difference. First operand has 530 places, 481 transitions, 1181 flow. Second operand 45 states and 20352 transitions. [2022-11-20 11:38:16,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 532 transitions, 1685 flow [2022-11-20 11:38:16,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 532 transitions, 1645 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:38:16,322 INFO L231 Difference]: Finished difference. Result has 577 places, 506 transitions, 1459 flow [2022-11-20 11:38:16,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1459, PETRI_PLACES=577, PETRI_TRANSITIONS=506} [2022-11-20 11:38:16,323 INFO L288 CegarLoopForPetriNet]: 505 programPoint places, 72 predicate places. [2022-11-20 11:38:16,323 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 506 transitions, 1459 flow [2022-11-20 11:38:16,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:16,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:16,326 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:16,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-20 11:38:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-11-20 11:38:16,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash -813914885, now seen corresponding path program 1 times [2022-11-20 11:38:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131037692] [2022-11-20 11:38:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:16,551 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:38:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:16,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:38:16,596 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:38:16,596 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:38:16,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:38:16,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-11-20 11:38:16,597 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 11:38:16,597 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:38:16,597 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-11-20 11:38:16,647 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:38:16,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 534 places, 601 transitions, 1522 flow [2022-11-20 11:38:17,103 INFO L130 PetriNetUnfolder]: 164/1220 cut-off events. [2022-11-20 11:38:17,103 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-11-20 11:38:17,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1405 conditions, 1220 events. 164/1220 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4565 event pairs, 0 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 1286. Up to 34 conditions per place. [2022-11-20 11:38:17,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 534 places, 601 transitions, 1522 flow [2022-11-20 11:38:17,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 534 places, 601 transitions, 1522 flow [2022-11-20 11:38:17,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:38:17,181 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:38:17,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:38:17,187 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-20 11:38:17,188 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:38:17,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:17,188 INFO L209 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] [2022-11-20 11:38:17,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1014791238, now seen corresponding path program 1 times [2022-11-20 11:38:17,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:17,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874846650] [2022-11-20 11:38:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:17,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:17,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:17,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874846650] [2022-11-20 11:38:17,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874846650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:17,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:17,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:38:17,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275191751] [2022-11-20 11:38:17,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:17,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:38:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:17,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:38:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:38:17,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 484 out of 601 [2022-11-20 11:38:17,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 601 transitions, 1522 flow. Second operand has 2 states, 2 states have (on average 484.5) internal successors, (969), 2 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:17,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 484 of 601 [2022-11-20 11:38:17,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:17,580 INFO L130 PetriNetUnfolder]: 0/1039 cut-off events. [2022-11-20 11:38:17,580 INFO L131 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-11-20 11:38:17,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1241 conditions, 1039 events. 0/1039 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4204 event pairs, 0 based on Foata normal form. 796/1801 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-20 11:38:17,583 INFO L137 encePairwiseOnDemand]: 501/601 looper letters, 16 selfloop transitions, 0 changer transitions 12/500 dead transitions. [2022-11-20 11:38:17,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 500 transitions, 1352 flow [2022-11-20 11:38:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:38:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:38:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1084 transitions. [2022-11-20 11:38:17,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9018302828618968 [2022-11-20 11:38:17,584 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1084 transitions. [2022-11-20 11:38:17,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1084 transitions. [2022-11-20 11:38:17,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:17,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1084 transitions. [2022-11-20 11:38:17,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 542.0) internal successors, (1084), 2 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 601.0) internal successors, (1803), 3 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,586 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 601.0) internal successors, (1803), 3 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,586 INFO L175 Difference]: Start difference. First operand has 534 places, 601 transitions, 1522 flow. Second operand 2 states and 1084 transitions. [2022-11-20 11:38:17,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 500 transitions, 1352 flow [2022-11-20 11:38:17,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 500 transitions, 1112 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:17,592 INFO L231 Difference]: Finished difference. Result has 534 places, 488 transitions, 1056 flow [2022-11-20 11:38:17,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1056, PETRI_PLACES=534, PETRI_TRANSITIONS=488} [2022-11-20 11:38:17,593 INFO L288 CegarLoopForPetriNet]: 534 programPoint places, 0 predicate places. [2022-11-20 11:38:17,593 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 488 transitions, 1056 flow [2022-11-20 11:38:17,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 484.5) internal successors, (969), 2 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:17,593 INFO L209 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] [2022-11-20 11:38:17,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-11-20 11:38:17,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash 721388231, now seen corresponding path program 1 times [2022-11-20 11:38:17,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:17,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009905991] [2022-11-20 11:38:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:17,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009905991] [2022-11-20 11:38:17,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009905991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:17,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:17,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:38:17,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006707080] [2022-11-20 11:38:17,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:17,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:38:17,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:38:17,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:38:17,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 477 out of 601 [2022-11-20 11:38:17,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 488 transitions, 1056 flow. Second operand has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:17,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 477 of 601 [2022-11-20 11:38:17,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:17,938 INFO L130 PetriNetUnfolder]: 0/822 cut-off events. [2022-11-20 11:38:17,938 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-20 11:38:17,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 822 events. 0/822 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2783 event pairs, 0 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-11-20 11:38:17,940 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 25 selfloop transitions, 2 changer transitions 0/492 dead transitions. [2022-11-20 11:38:17,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 492 transitions, 1118 flow [2022-11-20 11:38:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:38:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:38:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1459 transitions. [2022-11-20 11:38:17,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8092068774265113 [2022-11-20 11:38:17,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1459 transitions. [2022-11-20 11:38:17,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1459 transitions. [2022-11-20 11:38:17,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:17,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1459 transitions. [2022-11-20 11:38:17,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 486.3333333333333) internal successors, (1459), 3 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,946 INFO L175 Difference]: Start difference. First operand has 534 places, 488 transitions, 1056 flow. Second operand 3 states and 1459 transitions. [2022-11-20 11:38:17,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 492 transitions, 1118 flow [2022-11-20 11:38:17,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 492 transitions, 1118 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:17,951 INFO L231 Difference]: Finished difference. Result has 525 places, 489 transitions, 1068 flow [2022-11-20 11:38:17,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1068, PETRI_PLACES=525, PETRI_TRANSITIONS=489} [2022-11-20 11:38:17,953 INFO L288 CegarLoopForPetriNet]: 534 programPoint places, -9 predicate places. [2022-11-20 11:38:17,953 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 489 transitions, 1068 flow [2022-11-20 11:38:17,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:17,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:17,954 INFO L209 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] [2022-11-20 11:38:17,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-11-20 11:38:17,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:17,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1266935680, now seen corresponding path program 1 times [2022-11-20 11:38:17,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:17,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073650321] [2022-11-20 11:38:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:17,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:17,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:17,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073650321] [2022-11-20 11:38:18,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073650321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:18,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463245695] [2022-11-20 11:38:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:18,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:18,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:18,002 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:18,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 11:38:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:18,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:38:18,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:18,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:18,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463245695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:18,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:18,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:38:18,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544810391] [2022-11-20 11:38:18,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:18,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:38:18,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:18,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:38:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:38:18,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-11-20 11:38:18,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 489 transitions, 1068 flow. Second operand has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:18,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-11-20 11:38:18,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:18,817 INFO L130 PetriNetUnfolder]: 0/796 cut-off events. [2022-11-20 11:38:18,817 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 11:38:18,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 796 events. 0/796 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2638 event pairs, 0 based on Foata normal form. 2/798 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-11-20 11:38:18,820 INFO L137 encePairwiseOnDemand]: 595/601 looper letters, 26 selfloop transitions, 9 changer transitions 0/499 dead transitions. [2022-11-20 11:38:18,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 499 transitions, 1160 flow [2022-11-20 11:38:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:38:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:38:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4321 transitions. [2022-11-20 11:38:18,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.798853762248105 [2022-11-20 11:38:18,823 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4321 transitions. [2022-11-20 11:38:18,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4321 transitions. [2022-11-20 11:38:18,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:18,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4321 transitions. [2022-11-20 11:38:18,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 480.1111111111111) internal successors, (4321), 9 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,832 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,832 INFO L175 Difference]: Start difference. First operand has 525 places, 489 transitions, 1068 flow. Second operand 9 states and 4321 transitions. [2022-11-20 11:38:18,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 499 transitions, 1160 flow [2022-11-20 11:38:18,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 499 transitions, 1158 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:18,842 INFO L231 Difference]: Finished difference. Result has 535 places, 495 transitions, 1116 flow [2022-11-20 11:38:18,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1116, PETRI_PLACES=535, PETRI_TRANSITIONS=495} [2022-11-20 11:38:18,843 INFO L288 CegarLoopForPetriNet]: 534 programPoint places, 1 predicate places. [2022-11-20 11:38:18,844 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 495 transitions, 1116 flow [2022-11-20 11:38:18,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:18,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:18,845 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:18,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:19,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:19,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash 567657013, now seen corresponding path program 1 times [2022-11-20 11:38:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:19,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061392532] [2022-11-20 11:38:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:19,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:19,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061392532] [2022-11-20 11:38:19,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061392532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:19,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744041437] [2022-11-20 11:38:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:19,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:19,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:19,142 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:19,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 11:38:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:19,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:38:19,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:19,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:19,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744041437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:19,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:19,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:38:19,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395504611] [2022-11-20 11:38:19,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:19,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:38:19,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:19,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:38:19,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:38:19,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-11-20 11:38:19,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 495 transitions, 1116 flow. Second operand has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:19,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:19,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-11-20 11:38:19,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:20,151 INFO L130 PetriNetUnfolder]: 0/744 cut-off events. [2022-11-20 11:38:20,151 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-11-20 11:38:20,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 744 events. 0/744 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2286 event pairs, 0 based on Foata normal form. 4/748 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-20 11:38:20,152 INFO L137 encePairwiseOnDemand]: 595/601 looper letters, 34 selfloop transitions, 21 changer transitions 0/519 dead transitions. [2022-11-20 11:38:20,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 519 transitions, 1334 flow [2022-11-20 11:38:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:38:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:38:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10055 transitions. [2022-11-20 11:38:20,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7966880595832343 [2022-11-20 11:38:20,157 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10055 transitions. [2022-11-20 11:38:20,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10055 transitions. [2022-11-20 11:38:20,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:20,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10055 transitions. [2022-11-20 11:38:20,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 478.8095238095238) internal successors, (10055), 21 states have internal predecessors, (10055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:20,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:20,171 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:20,172 INFO L175 Difference]: Start difference. First operand has 535 places, 495 transitions, 1116 flow. Second operand 21 states and 10055 transitions. [2022-11-20 11:38:20,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 519 transitions, 1334 flow [2022-11-20 11:38:20,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 519 transitions, 1320 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:20,178 INFO L231 Difference]: Finished difference. Result has 559 places, 508 transitions, 1240 flow [2022-11-20 11:38:20,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1240, PETRI_PLACES=559, PETRI_TRANSITIONS=508} [2022-11-20 11:38:20,178 INFO L288 CegarLoopForPetriNet]: 534 programPoint places, 25 predicate places. [2022-11-20 11:38:20,179 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 508 transitions, 1240 flow [2022-11-20 11:38:20,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:20,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:20,181 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:20,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:20,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:20,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1105185707, now seen corresponding path program 1 times [2022-11-20 11:38:20,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:20,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986813306] [2022-11-20 11:38:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:20,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:20,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:20,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986813306] [2022-11-20 11:38:20,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986813306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:20,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235240098] [2022-11-20 11:38:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:20,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:20,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:20,625 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 11:38:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:21,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:38:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:21,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:21,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235240098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:21,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:21,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:38:21,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230800122] [2022-11-20 11:38:21,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:21,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:38:21,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:38:21,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:38:21,541 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-11-20 11:38:21,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 508 transitions, 1240 flow. Second operand has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:21,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:21,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-11-20 11:38:21,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:22,478 INFO L130 PetriNetUnfolder]: 0/640 cut-off events. [2022-11-20 11:38:22,478 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-11-20 11:38:22,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 640 events. 0/640 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1606 event pairs, 0 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-11-20 11:38:22,479 INFO L137 encePairwiseOnDemand]: 595/601 looper letters, 50 selfloop transitions, 45 changer transitions 0/559 dead transitions. [2022-11-20 11:38:22,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 559 transitions, 1746 flow [2022-11-20 11:38:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:38:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:38:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21523 transitions. [2022-11-20 11:38:22,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.795821778517286 [2022-11-20 11:38:22,490 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21523 transitions. [2022-11-20 11:38:22,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21523 transitions. [2022-11-20 11:38:22,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:22,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21523 transitions. [2022-11-20 11:38:22,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 478.2888888888889) internal successors, (21523), 45 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:22,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:22,522 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:22,522 INFO L175 Difference]: Start difference. First operand has 559 places, 508 transitions, 1240 flow. Second operand 45 states and 21523 transitions. [2022-11-20 11:38:22,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 559 transitions, 1746 flow [2022-11-20 11:38:22,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 559 transitions, 1706 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:38:22,534 INFO L231 Difference]: Finished difference. Result has 606 places, 533 transitions, 1518 flow [2022-11-20 11:38:22,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1518, PETRI_PLACES=606, PETRI_TRANSITIONS=533} [2022-11-20 11:38:22,535 INFO L288 CegarLoopForPetriNet]: 534 programPoint places, 72 predicate places. [2022-11-20 11:38:22,535 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 533 transitions, 1518 flow [2022-11-20 11:38:22,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:22,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:22,538 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:22,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-20 11:38:22,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:22,745 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2142953785, now seen corresponding path program 1 times [2022-11-20 11:38:22,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:22,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364339244] [2022-11-20 11:38:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:23,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364339244] [2022-11-20 11:38:23,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364339244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:23,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748676292] [2022-11-20 11:38:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:23,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:23,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:23,514 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:23,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 11:38:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:23,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:38:23,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:24,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:25,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748676292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:25,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:25,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:38:25,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630671277] [2022-11-20 11:38:25,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:25,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:38:25,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:38:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:38:25,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-11-20 11:38:25,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 533 transitions, 1518 flow. Second operand has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:25,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:25,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-11-20 11:38:25,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:26,467 INFO L130 PetriNetUnfolder]: 0/614 cut-off events. [2022-11-20 11:38:26,467 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-11-20 11:38:26,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-11-20 11:38:26,469 INFO L137 encePairwiseOnDemand]: 596/601 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-11-20 11:38:26,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-11-20 11:38:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 11:38:26,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-20 11:38:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24378 transitions. [2022-11-20 11:38:26,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7953410981697171 [2022-11-20 11:38:26,481 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24378 transitions. [2022-11-20 11:38:26,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24378 transitions. [2022-11-20 11:38:26,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:26,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24378 transitions. [2022-11-20 11:38:26,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 478.0) internal successors, (24378), 51 states have internal predecessors, (24378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:26,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:26,516 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:26,516 INFO L175 Difference]: Start difference. First operand has 606 places, 533 transitions, 1518 flow. Second operand 51 states and 24378 transitions. [2022-11-20 11:38:26,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-11-20 11:38:26,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-11-20 11:38:26,524 INFO L231 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-11-20 11:38:26,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=610, PETRI_TRANSITIONS=523} [2022-11-20 11:38:26,525 INFO L288 CegarLoopForPetriNet]: 534 programPoint places, 76 predicate places. [2022-11-20 11:38:26,525 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-11-20 11:38:26,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:26,529 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:26,529 INFO L209 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:26,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-20 11:38:26,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:26,730 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:26,730 INFO L85 PathProgramCache]: Analyzing trace with hash -823919421, now seen corresponding path program 1 times [2022-11-20 11:38:26,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:26,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495620308] [2022-11-20 11:38:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:26,817 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:38:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:26,939 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:38:26,958 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:38:26,958 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:38:26,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:38:26,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-11-20 11:38:26,959 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:26,959 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:38:26,959 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-11-20 11:38:27,052 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:38:27,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 563 places, 634 transitions, 1625 flow [2022-11-20 11:38:27,648 INFO L130 PetriNetUnfolder]: 174/1292 cut-off events. [2022-11-20 11:38:27,649 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-11-20 11:38:27,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 1292 events. 174/1292 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4843 event pairs, 0 based on Foata normal form. 0/1082 useless extension candidates. Maximal degree in co-relation 1377. Up to 36 conditions per place. [2022-11-20 11:38:27,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 563 places, 634 transitions, 1625 flow [2022-11-20 11:38:27,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 563 places, 634 transitions, 1625 flow [2022-11-20 11:38:27,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:38:27,749 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:38:27,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:38:27,756 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-20 11:38:27,756 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:38:27,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:27,757 INFO L209 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] [2022-11-20 11:38:27,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2008288006, now seen corresponding path program 1 times [2022-11-20 11:38:27,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:27,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666405392] [2022-11-20 11:38:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:27,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:27,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:27,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666405392] [2022-11-20 11:38:27,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666405392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:27,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:27,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:38:27,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539166281] [2022-11-20 11:38:27,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:27,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:38:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:38:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:38:27,776 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 510 out of 634 [2022-11-20 11:38:27,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 634 transitions, 1625 flow. Second operand has 2 states, 2 states have (on average 510.5) internal successors, (1021), 2 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:27,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:27,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 510 of 634 [2022-11-20 11:38:27,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:28,328 INFO L130 PetriNetUnfolder]: 0/1100 cut-off events. [2022-11-20 11:38:28,328 INFO L131 PetriNetUnfolder]: For 1105/1105 co-relation queries the response was YES. [2022-11-20 11:38:28,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 1100 events. 0/1100 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4472 event pairs, 0 based on Foata normal form. 896/1960 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-20 11:38:28,330 INFO L137 encePairwiseOnDemand]: 528/634 looper letters, 17 selfloop transitions, 0 changer transitions 12/527 dead transitions. [2022-11-20 11:38:28,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 527 transitions, 1445 flow [2022-11-20 11:38:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:38:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:38:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1143 transitions. [2022-11-20 11:38:28,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9014195583596214 [2022-11-20 11:38:28,332 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1143 transitions. [2022-11-20 11:38:28,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1143 transitions. [2022-11-20 11:38:28,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:28,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1143 transitions. [2022-11-20 11:38:28,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 571.5) internal successors, (1143), 2 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,335 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,336 INFO L175 Difference]: Start difference. First operand has 563 places, 634 transitions, 1625 flow. Second operand 2 states and 1143 transitions. [2022-11-20 11:38:28,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 527 transitions, 1445 flow [2022-11-20 11:38:28,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 527 transitions, 1173 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:28,346 INFO L231 Difference]: Finished difference. Result has 563 places, 515 transitions, 1115 flow [2022-11-20 11:38:28,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1115, PETRI_PLACES=563, PETRI_TRANSITIONS=515} [2022-11-20 11:38:28,348 INFO L288 CegarLoopForPetriNet]: 563 programPoint places, 0 predicate places. [2022-11-20 11:38:28,348 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 515 transitions, 1115 flow [2022-11-20 11:38:28,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 510.5) internal successors, (1021), 2 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:28,349 INFO L209 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] [2022-11-20 11:38:28,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-11-20 11:38:28,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1714884999, now seen corresponding path program 1 times [2022-11-20 11:38:28,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:28,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310358225] [2022-11-20 11:38:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:28,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:28,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:28,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310358225] [2022-11-20 11:38:28,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310358225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:28,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:28,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:38:28,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367119573] [2022-11-20 11:38:28,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:28,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:38:28,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:28,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:38:28,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:38:28,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 634 [2022-11-20 11:38:28,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 515 transitions, 1115 flow. Second operand has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:28,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 634 [2022-11-20 11:38:28,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:28,762 INFO L130 PetriNetUnfolder]: 0/871 cut-off events. [2022-11-20 11:38:28,762 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 11:38:28,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 871 events. 0/871 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2966 event pairs, 0 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-11-20 11:38:28,764 INFO L137 encePairwiseOnDemand]: 631/634 looper letters, 26 selfloop transitions, 2 changer transitions 0/519 dead transitions. [2022-11-20 11:38:28,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 519 transitions, 1179 flow [2022-11-20 11:38:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:38:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:38:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1538 transitions. [2022-11-20 11:38:28,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8086225026288117 [2022-11-20 11:38:28,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1538 transitions. [2022-11-20 11:38:28,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1538 transitions. [2022-11-20 11:38:28,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:28,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1538 transitions. [2022-11-20 11:38:28,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 512.6666666666666) internal successors, (1538), 3 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,769 INFO L175 Difference]: Start difference. First operand has 563 places, 515 transitions, 1115 flow. Second operand 3 states and 1538 transitions. [2022-11-20 11:38:28,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 519 transitions, 1179 flow [2022-11-20 11:38:28,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 519 transitions, 1179 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:28,776 INFO L231 Difference]: Finished difference. Result has 554 places, 516 transitions, 1127 flow [2022-11-20 11:38:28,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1127, PETRI_PLACES=554, PETRI_TRANSITIONS=516} [2022-11-20 11:38:28,777 INFO L288 CegarLoopForPetriNet]: 563 programPoint places, -9 predicate places. [2022-11-20 11:38:28,777 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 516 transitions, 1127 flow [2022-11-20 11:38:28,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:28,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:28,778 INFO L209 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] [2022-11-20 11:38:28,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-11-20 11:38:28,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1508779104, now seen corresponding path program 1 times [2022-11-20 11:38:28,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:28,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883881665] [2022-11-20 11:38:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:28,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:28,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883881665] [2022-11-20 11:38:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883881665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008160473] [2022-11-20 11:38:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:28,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:28,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:28,820 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:28,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 11:38:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:29,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:38:29,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:29,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:29,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008160473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:29,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:29,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:38:29,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86932958] [2022-11-20 11:38:29,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:29,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:38:29,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:38:29,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:38:29,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-11-20 11:38:29,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 516 transitions, 1127 flow. Second operand has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:29,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:29,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-11-20 11:38:29,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:29,677 INFO L130 PetriNetUnfolder]: 0/845 cut-off events. [2022-11-20 11:38:29,678 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 11:38:29,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073 conditions, 845 events. 0/845 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2819 event pairs, 0 based on Foata normal form. 2/847 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-11-20 11:38:29,679 INFO L137 encePairwiseOnDemand]: 628/634 looper letters, 27 selfloop transitions, 9 changer transitions 0/526 dead transitions. [2022-11-20 11:38:29,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 526 transitions, 1221 flow [2022-11-20 11:38:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:38:29,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:38:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4556 transitions. [2022-11-20 11:38:29,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7984577637574483 [2022-11-20 11:38:29,682 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4556 transitions. [2022-11-20 11:38:29,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4556 transitions. [2022-11-20 11:38:29,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:29,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4556 transitions. [2022-11-20 11:38:29,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 506.22222222222223) internal successors, (4556), 9 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:29,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:29,689 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:29,690 INFO L175 Difference]: Start difference. First operand has 554 places, 516 transitions, 1127 flow. Second operand 9 states and 4556 transitions. [2022-11-20 11:38:29,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 526 transitions, 1221 flow [2022-11-20 11:38:29,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 526 transitions, 1219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:29,698 INFO L231 Difference]: Finished difference. Result has 564 places, 522 transitions, 1175 flow [2022-11-20 11:38:29,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1175, PETRI_PLACES=564, PETRI_TRANSITIONS=522} [2022-11-20 11:38:29,699 INFO L288 CegarLoopForPetriNet]: 563 programPoint places, 1 predicate places. [2022-11-20 11:38:29,699 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 522 transitions, 1175 flow [2022-11-20 11:38:29,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:29,699 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:29,700 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:29,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:29,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:29,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:29,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:29,901 INFO L85 PathProgramCache]: Analyzing trace with hash -587987435, now seen corresponding path program 1 times [2022-11-20 11:38:29,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:29,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813589534] [2022-11-20 11:38:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:29,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:29,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813589534] [2022-11-20 11:38:29,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813589534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:29,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011031677] [2022-11-20 11:38:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:29,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:29,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:29,978 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:29,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 11:38:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:30,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:38:30,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:30,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:30,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011031677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:30,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:30,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:38:30,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663848924] [2022-11-20 11:38:30,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:30,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:38:30,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:38:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:38:30,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-11-20 11:38:30,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 522 transitions, 1175 flow. Second operand has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:30,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:30,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-11-20 11:38:30,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:31,132 INFO L130 PetriNetUnfolder]: 0/793 cut-off events. [2022-11-20 11:38:31,132 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-11-20 11:38:31,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 793 events. 0/793 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2469 event pairs, 0 based on Foata normal form. 4/797 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-20 11:38:31,133 INFO L137 encePairwiseOnDemand]: 628/634 looper letters, 35 selfloop transitions, 21 changer transitions 0/546 dead transitions. [2022-11-20 11:38:31,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 546 transitions, 1395 flow [2022-11-20 11:38:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:38:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:38:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10602 transitions. [2022-11-20 11:38:31,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7963046417305092 [2022-11-20 11:38:31,140 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10602 transitions. [2022-11-20 11:38:31,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10602 transitions. [2022-11-20 11:38:31,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:31,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10602 transitions. [2022-11-20 11:38:31,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 504.85714285714283) internal successors, (10602), 21 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:31,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:31,156 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:31,156 INFO L175 Difference]: Start difference. First operand has 564 places, 522 transitions, 1175 flow. Second operand 21 states and 10602 transitions. [2022-11-20 11:38:31,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 546 transitions, 1395 flow [2022-11-20 11:38:31,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 546 transitions, 1381 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:31,163 INFO L231 Difference]: Finished difference. Result has 588 places, 535 transitions, 1299 flow [2022-11-20 11:38:31,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1299, PETRI_PLACES=588, PETRI_TRANSITIONS=535} [2022-11-20 11:38:31,164 INFO L288 CegarLoopForPetriNet]: 563 programPoint places, 25 predicate places. [2022-11-20 11:38:31,164 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 535 transitions, 1299 flow [2022-11-20 11:38:31,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:31,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:31,166 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:31,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 11:38:31,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-11-20 11:38:31,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash -819498741, now seen corresponding path program 1 times [2022-11-20 11:38:31,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:31,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156700530] [2022-11-20 11:38:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:31,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:31,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156700530] [2022-11-20 11:38:31,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156700530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:31,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320710863] [2022-11-20 11:38:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:31,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:31,630 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:31,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 11:38:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:38:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:32,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:32,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320710863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:32,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:32,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:38:32,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131123850] [2022-11-20 11:38:32,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:32,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:38:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:38:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:38:32,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-11-20 11:38:32,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 535 transitions, 1299 flow. Second operand has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:32,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:32,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-11-20 11:38:32,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:33,526 INFO L130 PetriNetUnfolder]: 0/689 cut-off events. [2022-11-20 11:38:33,526 INFO L131 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-11-20 11:38:33,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 689 events. 0/689 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1791 event pairs, 0 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-20 11:38:33,527 INFO L137 encePairwiseOnDemand]: 628/634 looper letters, 51 selfloop transitions, 45 changer transitions 0/586 dead transitions. [2022-11-20 11:38:33,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 586 transitions, 1807 flow [2022-11-20 11:38:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:38:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:38:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22694 transitions. [2022-11-20 11:38:33,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7954433929197336 [2022-11-20 11:38:33,539 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22694 transitions. [2022-11-20 11:38:33,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22694 transitions. [2022-11-20 11:38:33,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:33,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22694 transitions. [2022-11-20 11:38:33,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 504.31111111111113) internal successors, (22694), 45 states have internal predecessors, (22694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:33,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:33,574 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:33,574 INFO L175 Difference]: Start difference. First operand has 588 places, 535 transitions, 1299 flow. Second operand 45 states and 22694 transitions. [2022-11-20 11:38:33,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 586 transitions, 1807 flow [2022-11-20 11:38:33,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 586 transitions, 1767 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:38:33,586 INFO L231 Difference]: Finished difference. Result has 635 places, 560 transitions, 1577 flow [2022-11-20 11:38:33,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1577, PETRI_PLACES=635, PETRI_TRANSITIONS=560} [2022-11-20 11:38:33,587 INFO L288 CegarLoopForPetriNet]: 563 programPoint places, 72 predicate places. [2022-11-20 11:38:33,587 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 560 transitions, 1577 flow [2022-11-20 11:38:33,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:33,591 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:33,591 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:33,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-20 11:38:33,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:33,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1853815001, now seen corresponding path program 1 times [2022-11-20 11:38:33,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:33,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581059810] [2022-11-20 11:38:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:33,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:34,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581059810] [2022-11-20 11:38:34,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581059810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:34,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489522092] [2022-11-20 11:38:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:34,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:34,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:34,529 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:34,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 11:38:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:38:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:35,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:36,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489522092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:36,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:36,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:38:36,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144112686] [2022-11-20 11:38:36,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:36,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:38:36,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:36,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:38:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:38:36,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-11-20 11:38:36,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 560 transitions, 1577 flow. Second operand has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:36,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:36,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-11-20 11:38:36,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:37,519 INFO L130 PetriNetUnfolder]: 0/650 cut-off events. [2022-11-20 11:38:37,519 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-11-20 11:38:37,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-20 11:38:37,521 INFO L137 encePairwiseOnDemand]: 629/634 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-11-20 11:38:37,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 584 transitions, 1967 flow [2022-11-20 11:38:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 11:38:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-20 11:38:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27217 transitions. [2022-11-20 11:38:37,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7949818904077579 [2022-11-20 11:38:37,535 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27217 transitions. [2022-11-20 11:38:37,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27217 transitions. [2022-11-20 11:38:37,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:37,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27217 transitions. [2022-11-20 11:38:37,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 504.01851851851853) internal successors, (27217), 54 states have internal predecessors, (27217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:37,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:37,576 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:37,576 INFO L175 Difference]: Start difference. First operand has 635 places, 560 transitions, 1577 flow. Second operand 54 states and 27217 transitions. [2022-11-20 11:38:37,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 584 transitions, 1967 flow [2022-11-20 11:38:37,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-11-20 11:38:37,585 INFO L231 Difference]: Finished difference. Result has 642 places, 553 transitions, 1559 flow [2022-11-20 11:38:37,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=642, PETRI_TRANSITIONS=553} [2022-11-20 11:38:37,586 INFO L288 CegarLoopForPetriNet]: 563 programPoint places, 79 predicate places. [2022-11-20 11:38:37,586 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 553 transitions, 1559 flow [2022-11-20 11:38:37,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:37,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:37,590 INFO L209 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:37,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-20 11:38:37,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:37,791 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1613944372, now seen corresponding path program 1 times [2022-11-20 11:38:37,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:37,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871172247] [2022-11-20 11:38:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:37,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:37,819 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:38:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:37,873 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:38:37,873 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:38:37,874 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:38:37,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:38:37,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-11-20 11:38:37,874 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:37,875 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:38:37,875 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-11-20 11:38:37,928 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:38:37,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 592 places, 667 transitions, 1730 flow [2022-11-20 11:38:38,506 INFO L130 PetriNetUnfolder]: 184/1364 cut-off events. [2022-11-20 11:38:38,506 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-11-20 11:38:38,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1590 conditions, 1364 events. 184/1364 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5141 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1469. Up to 38 conditions per place. [2022-11-20 11:38:38,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 592 places, 667 transitions, 1730 flow [2022-11-20 11:38:38,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 592 places, 667 transitions, 1730 flow [2022-11-20 11:38:38,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:38:38,575 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:38:38,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:38:38,582 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-20 11:38:38,582 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:38:38,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:38,583 INFO L209 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] [2022-11-20 11:38:38,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash 445354150, now seen corresponding path program 1 times [2022-11-20 11:38:38,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:38,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027507180] [2022-11-20 11:38:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:38,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:38,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:38,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027507180] [2022-11-20 11:38:38,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027507180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:38,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:38,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:38:38,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580848820] [2022-11-20 11:38:38,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:38,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:38:38,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:38:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:38:38,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 667 [2022-11-20 11:38:38,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 667 transitions, 1730 flow. Second operand has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:38,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:38,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 667 [2022-11-20 11:38:38,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:39,093 INFO L130 PetriNetUnfolder]: 0/1161 cut-off events. [2022-11-20 11:38:39,093 INFO L131 PetriNetUnfolder]: For 1293/1293 co-relation queries the response was YES. [2022-11-20 11:38:39,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 1161 events. 0/1161 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4734 event pairs, 0 based on Foata normal form. 1002/2125 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-20 11:38:39,096 INFO L137 encePairwiseOnDemand]: 555/667 looper letters, 18 selfloop transitions, 0 changer transitions 12/554 dead transitions. [2022-11-20 11:38:39,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 554 transitions, 1540 flow [2022-11-20 11:38:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:38:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:38:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1202 transitions. [2022-11-20 11:38:39,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9010494752623688 [2022-11-20 11:38:39,100 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1202 transitions. [2022-11-20 11:38:39,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1202 transitions. [2022-11-20 11:38:39,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:39,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1202 transitions. [2022-11-20 11:38:39,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 601.0) internal successors, (1202), 2 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:39,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:39,102 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:39,102 INFO L175 Difference]: Start difference. First operand has 592 places, 667 transitions, 1730 flow. Second operand 2 states and 1202 transitions. [2022-11-20 11:38:39,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 554 transitions, 1540 flow [2022-11-20 11:38:39,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 554 transitions, 1234 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:39,111 INFO L231 Difference]: Finished difference. Result has 592 places, 542 transitions, 1174 flow [2022-11-20 11:38:39,111 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1174, PETRI_PLACES=592, PETRI_TRANSITIONS=542} [2022-11-20 11:38:39,112 INFO L288 CegarLoopForPetriNet]: 592 programPoint places, 0 predicate places. [2022-11-20 11:38:39,112 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 542 transitions, 1174 flow [2022-11-20 11:38:39,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:39,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:39,112 INFO L209 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] [2022-11-20 11:38:39,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-11-20 11:38:39,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash 151951143, now seen corresponding path program 1 times [2022-11-20 11:38:39,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:39,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668791844] [2022-11-20 11:38:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:39,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668791844] [2022-11-20 11:38:39,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668791844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:39,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:39,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:38:39,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762855875] [2022-11-20 11:38:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:39,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:38:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:38:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:38:39,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 667 [2022-11-20 11:38:39,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 542 transitions, 1174 flow. Second operand has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:39,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:39,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 667 [2022-11-20 11:38:39,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:39,524 INFO L130 PetriNetUnfolder]: 0/920 cut-off events. [2022-11-20 11:38:39,525 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 11:38:39,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 920 events. 0/920 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3149 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-11-20 11:38:39,526 INFO L137 encePairwiseOnDemand]: 664/667 looper letters, 27 selfloop transitions, 2 changer transitions 0/546 dead transitions. [2022-11-20 11:38:39,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 546 transitions, 1240 flow [2022-11-20 11:38:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:38:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:38:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1617 transitions. [2022-11-20 11:38:39,528 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.808095952023988 [2022-11-20 11:38:39,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1617 transitions. [2022-11-20 11:38:39,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1617 transitions. [2022-11-20 11:38:39,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:39,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1617 transitions. [2022-11-20 11:38:39,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 539.0) internal successors, (1617), 3 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:39,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:39,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:39,531 INFO L175 Difference]: Start difference. First operand has 592 places, 542 transitions, 1174 flow. Second operand 3 states and 1617 transitions. [2022-11-20 11:38:39,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 546 transitions, 1240 flow [2022-11-20 11:38:39,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 546 transitions, 1240 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:39,537 INFO L231 Difference]: Finished difference. Result has 583 places, 543 transitions, 1186 flow [2022-11-20 11:38:39,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1186, PETRI_PLACES=583, PETRI_TRANSITIONS=543} [2022-11-20 11:38:39,538 INFO L288 CegarLoopForPetriNet]: 592 programPoint places, -9 predicate places. [2022-11-20 11:38:39,538 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 543 transitions, 1186 flow [2022-11-20 11:38:39,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:39,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:39,539 INFO L209 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] [2022-11-20 11:38:39,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-11-20 11:38:39,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:39,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1519862336, now seen corresponding path program 1 times [2022-11-20 11:38:39,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:39,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499540042] [2022-11-20 11:38:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:39,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:39,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:39,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499540042] [2022-11-20 11:38:39,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499540042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:39,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158710298] [2022-11-20 11:38:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:39,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:39,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:39,612 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:39,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 11:38:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:40,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:38:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:40,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:40,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158710298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:40,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:40,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:38:40,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934124781] [2022-11-20 11:38:40,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:40,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:38:40,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:40,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:38:40,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:38:40,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-11-20 11:38:40,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 543 transitions, 1186 flow. Second operand has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:40,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:40,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-11-20 11:38:40,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:40,576 INFO L130 PetriNetUnfolder]: 0/894 cut-off events. [2022-11-20 11:38:40,576 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-20 11:38:40,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 894 events. 0/894 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3002 event pairs, 0 based on Foata normal form. 2/896 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-11-20 11:38:40,578 INFO L137 encePairwiseOnDemand]: 661/667 looper letters, 28 selfloop transitions, 9 changer transitions 0/553 dead transitions. [2022-11-20 11:38:40,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 553 transitions, 1282 flow [2022-11-20 11:38:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:38:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:38:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4791 transitions. [2022-11-20 11:38:40,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7981009495252374 [2022-11-20 11:38:40,582 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4791 transitions. [2022-11-20 11:38:40,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4791 transitions. [2022-11-20 11:38:40,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:40,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4791 transitions. [2022-11-20 11:38:40,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 532.3333333333334) internal successors, (4791), 9 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:40,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:40,589 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:40,589 INFO L175 Difference]: Start difference. First operand has 583 places, 543 transitions, 1186 flow. Second operand 9 states and 4791 transitions. [2022-11-20 11:38:40,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 553 transitions, 1282 flow [2022-11-20 11:38:40,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 553 transitions, 1280 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:40,597 INFO L231 Difference]: Finished difference. Result has 593 places, 549 transitions, 1234 flow [2022-11-20 11:38:40,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1234, PETRI_PLACES=593, PETRI_TRANSITIONS=549} [2022-11-20 11:38:40,598 INFO L288 CegarLoopForPetriNet]: 592 programPoint places, 1 predicate places. [2022-11-20 11:38:40,598 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 549 transitions, 1234 flow [2022-11-20 11:38:40,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:40,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:40,599 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:40,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-20 11:38:40,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:40,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash 418737845, now seen corresponding path program 1 times [2022-11-20 11:38:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128229394] [2022-11-20 11:38:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:40,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:40,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128229394] [2022-11-20 11:38:40,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128229394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:40,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988413294] [2022-11-20 11:38:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:40,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:40,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:40,889 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:40,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-20 11:38:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:41,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:38:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:41,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:41,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988413294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:41,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:41,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:38:41,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300654439] [2022-11-20 11:38:41,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:41,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:38:41,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:38:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:38:41,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-11-20 11:38:41,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 549 transitions, 1234 flow. Second operand has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:41,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:41,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-11-20 11:38:41,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:42,197 INFO L130 PetriNetUnfolder]: 0/842 cut-off events. [2022-11-20 11:38:42,198 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-20 11:38:42,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 842 events. 0/842 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2655 event pairs, 0 based on Foata normal form. 4/846 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-20 11:38:42,199 INFO L137 encePairwiseOnDemand]: 661/667 looper letters, 36 selfloop transitions, 21 changer transitions 0/573 dead transitions. [2022-11-20 11:38:42,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 573 transitions, 1456 flow [2022-11-20 11:38:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:38:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:38:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11149 transitions. [2022-11-20 11:38:42,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7959591632755051 [2022-11-20 11:38:42,205 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11149 transitions. [2022-11-20 11:38:42,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11149 transitions. [2022-11-20 11:38:42,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:42,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11149 transitions. [2022-11-20 11:38:42,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 530.9047619047619) internal successors, (11149), 21 states have internal predecessors, (11149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:42,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:42,223 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:42,223 INFO L175 Difference]: Start difference. First operand has 593 places, 549 transitions, 1234 flow. Second operand 21 states and 11149 transitions. [2022-11-20 11:38:42,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 573 transitions, 1456 flow [2022-11-20 11:38:42,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 573 transitions, 1442 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:42,230 INFO L231 Difference]: Finished difference. Result has 617 places, 562 transitions, 1358 flow [2022-11-20 11:38:42,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1358, PETRI_PLACES=617, PETRI_TRANSITIONS=562} [2022-11-20 11:38:42,231 INFO L288 CegarLoopForPetriNet]: 592 programPoint places, 25 predicate places. [2022-11-20 11:38:42,231 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 562 transitions, 1358 flow [2022-11-20 11:38:42,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:42,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:42,232 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:42,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-20 11:38:42,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:42,433 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -899555925, now seen corresponding path program 1 times [2022-11-20 11:38:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:42,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345363759] [2022-11-20 11:38:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:42,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:42,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:42,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345363759] [2022-11-20 11:38:42,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345363759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:42,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898894312] [2022-11-20 11:38:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:42,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:42,698 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:42,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 11:38:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:43,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:38:43,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:43,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:43,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898894312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:43,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:43,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:38:43,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788816187] [2022-11-20 11:38:43,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:43,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:38:43,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:38:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:38:43,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-11-20 11:38:43,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 562 transitions, 1358 flow. Second operand has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:43,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:43,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-11-20 11:38:43,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:44,727 INFO L130 PetriNetUnfolder]: 0/738 cut-off events. [2022-11-20 11:38:44,727 INFO L131 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-11-20 11:38:44,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 738 events. 0/738 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1975 event pairs, 0 based on Foata normal form. 8/746 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-11-20 11:38:44,728 INFO L137 encePairwiseOnDemand]: 661/667 looper letters, 52 selfloop transitions, 45 changer transitions 0/613 dead transitions. [2022-11-20 11:38:44,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 613 transitions, 1868 flow [2022-11-20 11:38:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:38:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:38:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23865 transitions. [2022-11-20 11:38:44,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7951024487756122 [2022-11-20 11:38:44,740 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23865 transitions. [2022-11-20 11:38:44,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23865 transitions. [2022-11-20 11:38:44,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:44,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23865 transitions. [2022-11-20 11:38:44,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 530.3333333333334) internal successors, (23865), 45 states have internal predecessors, (23865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:44,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:44,776 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:44,776 INFO L175 Difference]: Start difference. First operand has 617 places, 562 transitions, 1358 flow. Second operand 45 states and 23865 transitions. [2022-11-20 11:38:44,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 613 transitions, 1868 flow [2022-11-20 11:38:44,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 613 transitions, 1828 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:38:44,787 INFO L231 Difference]: Finished difference. Result has 664 places, 587 transitions, 1636 flow [2022-11-20 11:38:44,788 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1636, PETRI_PLACES=664, PETRI_TRANSITIONS=587} [2022-11-20 11:38:44,788 INFO L288 CegarLoopForPetriNet]: 592 programPoint places, 72 predicate places. [2022-11-20 11:38:44,788 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 587 transitions, 1636 flow [2022-11-20 11:38:44,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:44,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:44,791 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:44,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-20 11:38:44,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-11-20 11:38:44,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash 707886023, now seen corresponding path program 1 times [2022-11-20 11:38:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:44,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988058751] [2022-11-20 11:38:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:45,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:45,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988058751] [2022-11-20 11:38:45,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988058751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:45,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904215668] [2022-11-20 11:38:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:45,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:45,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:45,732 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:45,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 11:38:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:46,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:38:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:46,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:47,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904215668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:47,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:47,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:38:47,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643980929] [2022-11-20 11:38:47,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:47,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:38:47,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:47,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:38:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:38:47,630 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-11-20 11:38:47,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 587 transitions, 1636 flow. Second operand has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:47,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:47,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-11-20 11:38:47,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:48,905 INFO L130 PetriNetUnfolder]: 0/686 cut-off events. [2022-11-20 11:38:48,905 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-11-20 11:38:48,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-11-20 11:38:48,906 INFO L137 encePairwiseOnDemand]: 662/667 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-11-20 11:38:48,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 616 transitions, 2082 flow [2022-11-20 11:38:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 11:38:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-20 11:38:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30212 transitions. [2022-11-20 11:38:48,920 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7946553039269839 [2022-11-20 11:38:48,921 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30212 transitions. [2022-11-20 11:38:48,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30212 transitions. [2022-11-20 11:38:48,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:48,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30212 transitions. [2022-11-20 11:38:48,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 530.0350877192982) internal successors, (30212), 57 states have internal predecessors, (30212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:48,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:48,967 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:48,967 INFO L175 Difference]: Start difference. First operand has 664 places, 587 transitions, 1636 flow. Second operand 57 states and 30212 transitions. [2022-11-20 11:38:48,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 616 transitions, 2082 flow [2022-11-20 11:38:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-11-20 11:38:48,976 INFO L231 Difference]: Finished difference. Result has 674 places, 583 transitions, 1647 flow [2022-11-20 11:38:48,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=674, PETRI_TRANSITIONS=583} [2022-11-20 11:38:48,976 INFO L288 CegarLoopForPetriNet]: 592 programPoint places, 82 predicate places. [2022-11-20 11:38:48,977 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 583 transitions, 1647 flow [2022-11-20 11:38:48,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:48,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:48,982 INFO L209 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:48,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-20 11:38:49,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:49,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash 540044470, now seen corresponding path program 1 times [2022-11-20 11:38:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660976427] [2022-11-20 11:38:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:49,213 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:38:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:38:49,264 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:38:49,264 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:38:49,264 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:38:49,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:38:49,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-11-20 11:38:49,265 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:38:49,265 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:38:49,266 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-11-20 11:38:49,325 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:38:49,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 621 places, 700 transitions, 1837 flow [2022-11-20 11:38:49,818 INFO L130 PetriNetUnfolder]: 194/1436 cut-off events. [2022-11-20 11:38:49,818 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-11-20 11:38:49,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1684 conditions, 1436 events. 194/1436 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5480 event pairs, 0 based on Foata normal form. 0/1202 useless extension candidates. Maximal degree in co-relation 1562. Up to 40 conditions per place. [2022-11-20 11:38:49,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 621 places, 700 transitions, 1837 flow [2022-11-20 11:38:49,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 621 places, 700 transitions, 1837 flow [2022-11-20 11:38:49,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:38:49,897 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:38:49,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:38:49,904 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-20 11:38:49,905 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:38:49,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:49,905 INFO L209 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] [2022-11-20 11:38:49,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:49,906 INFO L85 PathProgramCache]: Analyzing trace with hash 620956966, now seen corresponding path program 1 times [2022-11-20 11:38:49,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:49,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522654837] [2022-11-20 11:38:49,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:49,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:49,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:49,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522654837] [2022-11-20 11:38:49,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522654837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:49,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:49,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:38:49,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417909409] [2022-11-20 11:38:49,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:49,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:38:49,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:38:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:38:49,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 562 out of 700 [2022-11-20 11:38:49,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 700 transitions, 1837 flow. Second operand has 2 states, 2 states have (on average 562.5) internal successors, (1125), 2 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:49,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:49,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 562 of 700 [2022-11-20 11:38:49,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:50,514 INFO L130 PetriNetUnfolder]: 0/1222 cut-off events. [2022-11-20 11:38:50,514 INFO L131 PetriNetUnfolder]: For 1501/1501 co-relation queries the response was YES. [2022-11-20 11:38:50,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1222 events. 0/1222 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5006 event pairs, 0 based on Foata normal form. 1114/2296 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2022-11-20 11:38:50,516 INFO L137 encePairwiseOnDemand]: 582/700 looper letters, 19 selfloop transitions, 0 changer transitions 12/581 dead transitions. [2022-11-20 11:38:50,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 581 transitions, 1637 flow [2022-11-20 11:38:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:38:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:38:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1261 transitions. [2022-11-20 11:38:50,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9007142857142857 [2022-11-20 11:38:50,518 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1261 transitions. [2022-11-20 11:38:50,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1261 transitions. [2022-11-20 11:38:50,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:50,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1261 transitions. [2022-11-20 11:38:50,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 630.5) internal successors, (1261), 2 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:50,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 700.0) internal successors, (2100), 3 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:50,522 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 700.0) internal successors, (2100), 3 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:50,522 INFO L175 Difference]: Start difference. First operand has 621 places, 700 transitions, 1837 flow. Second operand 2 states and 1261 transitions. [2022-11-20 11:38:50,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 581 transitions, 1637 flow [2022-11-20 11:38:50,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 581 transitions, 1295 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:50,534 INFO L231 Difference]: Finished difference. Result has 621 places, 569 transitions, 1233 flow [2022-11-20 11:38:50,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1233, PETRI_PLACES=621, PETRI_TRANSITIONS=569} [2022-11-20 11:38:50,535 INFO L288 CegarLoopForPetriNet]: 621 programPoint places, 0 predicate places. [2022-11-20 11:38:50,535 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 569 transitions, 1233 flow [2022-11-20 11:38:50,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 562.5) internal successors, (1125), 2 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:50,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:50,535 INFO L209 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] [2022-11-20 11:38:50,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-11-20 11:38:50,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:50,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash 327553959, now seen corresponding path program 1 times [2022-11-20 11:38:50,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:50,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842908247] [2022-11-20 11:38:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:50,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842908247] [2022-11-20 11:38:50,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842908247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:38:50,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:38:50,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:38:50,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77031171] [2022-11-20 11:38:50,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:38:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:38:50,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:38:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:38:50,561 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 555 out of 700 [2022-11-20 11:38:50,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 569 transitions, 1233 flow. Second operand has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:50,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:50,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 555 of 700 [2022-11-20 11:38:50,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:50,966 INFO L130 PetriNetUnfolder]: 0/969 cut-off events. [2022-11-20 11:38:50,966 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 11:38:50,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 969 events. 0/969 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3332 event pairs, 0 based on Foata normal form. 0/950 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-11-20 11:38:50,968 INFO L137 encePairwiseOnDemand]: 697/700 looper letters, 28 selfloop transitions, 2 changer transitions 0/573 dead transitions. [2022-11-20 11:38:50,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 573 transitions, 1301 flow [2022-11-20 11:38:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:38:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:38:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1696 transitions. [2022-11-20 11:38:50,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8076190476190476 [2022-11-20 11:38:50,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1696 transitions. [2022-11-20 11:38:50,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1696 transitions. [2022-11-20 11:38:50,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:50,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1696 transitions. [2022-11-20 11:38:50,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 565.3333333333334) internal successors, (1696), 3 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:50,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:50,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:50,972 INFO L175 Difference]: Start difference. First operand has 621 places, 569 transitions, 1233 flow. Second operand 3 states and 1696 transitions. [2022-11-20 11:38:50,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 573 transitions, 1301 flow [2022-11-20 11:38:50,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 573 transitions, 1301 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:38:50,979 INFO L231 Difference]: Finished difference. Result has 612 places, 570 transitions, 1245 flow [2022-11-20 11:38:50,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1245, PETRI_PLACES=612, PETRI_TRANSITIONS=570} [2022-11-20 11:38:50,980 INFO L288 CegarLoopForPetriNet]: 621 programPoint places, -9 predicate places. [2022-11-20 11:38:50,980 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 570 transitions, 1245 flow [2022-11-20 11:38:50,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:50,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:38:50,981 INFO L209 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] [2022-11-20 11:38:50,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-11-20 11:38:50,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:38:50,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:38:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash -770945952, now seen corresponding path program 1 times [2022-11-20 11:38:50,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:38:50,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142786315] [2022-11-20 11:38:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:50,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:38:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:51,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:38:51,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142786315] [2022-11-20 11:38:51,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142786315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:38:51,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496803621] [2022-11-20 11:38:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:38:51,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:38:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:38:51,017 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:38:51,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 11:38:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:38:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:38:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:51,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:51,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496803621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:51,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:51,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:38:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389025059] [2022-11-20 11:38:51,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:51,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:38:51,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:38:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:38:51,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-11-20 11:38:51,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 570 transitions, 1245 flow. Second operand has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:51,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:38:51,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-11-20 11:38:51,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:38:52,014 INFO L130 PetriNetUnfolder]: 0/943 cut-off events. [2022-11-20 11:38:52,014 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-20 11:38:52,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 943 events. 0/943 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3190 event pairs, 0 based on Foata normal form. 2/945 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-20 11:38:52,016 INFO L137 encePairwiseOnDemand]: 694/700 looper letters, 29 selfloop transitions, 9 changer transitions 0/580 dead transitions. [2022-11-20 11:38:52,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 580 transitions, 1343 flow [2022-11-20 11:38:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:38:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:38:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5026 transitions. [2022-11-20 11:38:52,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7977777777777778 [2022-11-20 11:38:52,019 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5026 transitions. [2022-11-20 11:38:52,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5026 transitions. [2022-11-20 11:38:52,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:38:52,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5026 transitions. [2022-11-20 11:38:52,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 558.4444444444445) internal successors, (5026), 9 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:52,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:52,026 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:52,026 INFO L175 Difference]: Start difference. First operand has 612 places, 570 transitions, 1245 flow. Second operand 9 states and 5026 transitions. [2022-11-20 11:38:52,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 580 transitions, 1343 flow [2022-11-20 11:38:52,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 580 transitions, 1341 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:38:52,032 INFO L231 Difference]: Finished difference. Result has 622 places, 576 transitions, 1293 flow [2022-11-20 11:38:52,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=622, PETRI_TRANSITIONS=576} [2022-11-20 11:38:52,032 INFO L288 CegarLoopForPetriNet]: 621 programPoint places, 1 predicate places. [2022-11-20 11:38:52,033 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 576 transitions, 1293 flow [2022-11-20 11:38:52,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 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) WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-20 11:42:08,528 INFO L231 Difference]: Finished difference. Result has 994 places, 913 transitions, 2125 flow [2022-11-20 11:42:08,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=969, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2125, PETRI_PLACES=994, PETRI_TRANSITIONS=913} [2022-11-20 11:42:08,529 INFO L288 CegarLoopForPetriNet]: 969 programPoint places, 25 predicate places. [2022-11-20 11:42:08,530 INFO L495 AbstractCegarLoop]: Abstraction has has 994 places, 913 transitions, 2125 flow [2022-11-20 11:42:08,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 868.6111111111111) internal successors, (15635), 18 states have internal predecessors, (15635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:08,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:08,534 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:08,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-11-20 11:42:08,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2022-11-20 11:42:08,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1582942837, now seen corresponding path program 1 times [2022-11-20 11:42:08,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:08,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661866101] [2022-11-20 11:42:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:08,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:08,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:08,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661866101] [2022-11-20 11:42:08,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661866101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:42:08,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152681148] [2022-11-20 11:42:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:42:08,971 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:42:08,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-20 11:42:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:42:10,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:10,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:42:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:10,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152681148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:42:10,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:42:10,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:42:10,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790151806] [2022-11-20 11:42:10,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:42:10,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:42:10,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:10,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:42:10,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:42:10,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-11-20 11:42:10,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 913 transitions, 2125 flow. Second operand has 34 states, 34 states have (on average 868.7941176470588) internal successors, (29539), 34 states have internal predecessors, (29539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:10,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:10,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-11-20 11:42:10,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:42:12,787 INFO L130 PetriNetUnfolder]: 0/1375 cut-off events. [2022-11-20 11:42:12,787 INFO L131 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2022-11-20 11:42:12,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 1375 events. 0/1375 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4351 event pairs, 0 based on Foata normal form. 8/1383 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-20 11:42:12,791 INFO L137 encePairwiseOnDemand]: 1090/1096 looper letters, 65 selfloop transitions, 45 changer transitions 0/964 dead transitions. [2022-11-20 11:42:12,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1038 places, 964 transitions, 2661 flow [2022-11-20 11:42:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:42:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:42:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 39088 transitions. [2022-11-20 11:42:12,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7925385239253853 [2022-11-20 11:42:12,827 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 39088 transitions. [2022-11-20 11:42:12,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 39088 transitions. [2022-11-20 11:42:12,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:42:12,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 39088 transitions. [2022-11-20 11:42:12,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 868.6222222222223) internal successors, (39088), 45 states have internal predecessors, (39088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:12,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1096.0) internal successors, (50416), 46 states have internal predecessors, (50416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:12,923 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1096.0) internal successors, (50416), 46 states have internal predecessors, (50416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:12,923 INFO L175 Difference]: Start difference. First operand has 994 places, 913 transitions, 2125 flow. Second operand 45 states and 39088 transitions. [2022-11-20 11:42:12,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1038 places, 964 transitions, 2661 flow [2022-11-20 11:42:12,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1032 places, 964 transitions, 2621 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:42:12,945 INFO L231 Difference]: Finished difference. Result has 1041 places, 938 transitions, 2403 flow [2022-11-20 11:42:12,946 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=988, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=890, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2403, PETRI_PLACES=1041, PETRI_TRANSITIONS=938} [2022-11-20 11:42:12,946 INFO L288 CegarLoopForPetriNet]: 969 programPoint places, 72 predicate places. [2022-11-20 11:42:12,946 INFO L495 AbstractCegarLoop]: Abstraction has has 1041 places, 938 transitions, 2403 flow [2022-11-20 11:42:12,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 868.7941176470588) internal successors, (29539), 34 states have internal predecessors, (29539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:12,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:12,951 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:12,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-11-20 11:42:13,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-11-20 11:42:13,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash 294994599, now seen corresponding path program 1 times [2022-11-20 11:42:13,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:13,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028698949] [2022-11-20 11:42:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:13,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:13,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028698949] [2022-11-20 11:42:13,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028698949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:42:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018938183] [2022-11-20 11:42:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:13,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:13,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:42:13,778 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:42:13,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-20 11:42:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:42:14,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:15,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:42:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:16,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018938183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:42:16,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:42:16,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:42:16,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206886252] [2022-11-20 11:42:16,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:42:16,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:42:16,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:42:16,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:42:16,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-11-20 11:42:16,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1041 places, 938 transitions, 2403 flow. Second operand has 66 states, 66 states have (on average 868.8939393939394) internal successors, (57347), 66 states have internal predecessors, (57347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:16,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:16,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-11-20 11:42:16,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:42:19,802 INFO L130 PetriNetUnfolder]: 0/1167 cut-off events. [2022-11-20 11:42:19,803 INFO L131 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-11-20 11:42:19,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 1167 events. 0/1167 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2991 event pairs, 0 based on Foata normal form. 16/1183 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2022-11-20 11:42:19,805 INFO L137 encePairwiseOnDemand]: 1090/1096 looper letters, 97 selfloop transitions, 93 changer transitions 0/1044 dead transitions. [2022-11-20 11:42:19,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1133 places, 1044 transitions, 3631 flow [2022-11-20 11:42:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:42:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:42:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 80744 transitions. [2022-11-20 11:42:19,848 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7921670198571541 [2022-11-20 11:42:19,848 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 80744 transitions. [2022-11-20 11:42:19,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 80744 transitions. [2022-11-20 11:42:19,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:42:19,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 80744 transitions. [2022-11-20 11:42:19,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 868.2150537634409) internal successors, (80744), 93 states have internal predecessors, (80744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:19,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1096.0) internal successors, (103024), 94 states have internal predecessors, (103024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:19,995 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1096.0) internal successors, (103024), 94 states have internal predecessors, (103024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:19,995 INFO L175 Difference]: Start difference. First operand has 1041 places, 938 transitions, 2403 flow. Second operand 93 states and 80744 transitions. [2022-11-20 11:42:19,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1133 places, 1044 transitions, 3631 flow [2022-11-20 11:42:20,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1115 places, 1044 transitions, 3543 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:42:20,025 INFO L231 Difference]: Finished difference. Result has 1132 places, 987 transitions, 3037 flow [2022-11-20 11:42:20,025 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=1023, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3037, PETRI_PLACES=1132, PETRI_TRANSITIONS=987} [2022-11-20 11:42:20,026 INFO L288 CegarLoopForPetriNet]: 969 programPoint places, 163 predicate places. [2022-11-20 11:42:20,026 INFO L495 AbstractCegarLoop]: Abstraction has has 1132 places, 987 transitions, 3037 flow [2022-11-20 11:42:20,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 868.8939393939394) internal successors, (57347), 66 states have internal predecessors, (57347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:20,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:20,031 INFO L209 CegarLoopForPetriNet]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:20,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-11-20 11:42:20,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-11-20 11:42:20,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash 323483123, now seen corresponding path program 1 times [2022-11-20 11:42:20,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:20,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444646033] [2022-11-20 11:42:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:20,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:42:20,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:42:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:42:20,375 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:42:20,376 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:42:20,376 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:42:20,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:42:20,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-11-20 11:42:20,376 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:20,377 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:42:20,377 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2022-11-20 11:42:20,461 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:42:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 998 places, 1129 transitions, 3410 flow [2022-11-20 11:42:22,634 INFO L130 PetriNetUnfolder]: 324/2372 cut-off events. [2022-11-20 11:42:22,634 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-11-20 11:42:22,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 2372 events. 324/2372 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8947 event pairs, 0 based on Foata normal form. 0/1982 useless extension candidates. Maximal degree in co-relation 2862. Up to 66 conditions per place. [2022-11-20 11:42:22,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 998 places, 1129 transitions, 3410 flow [2022-11-20 11:42:23,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 998 places, 1129 transitions, 3410 flow [2022-11-20 11:42:23,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:42:23,194 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:42:23,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:42:23,200 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:42:23,200 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:42:23,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:23,200 INFO L209 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] [2022-11-20 11:42:23,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:23,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2098126522, now seen corresponding path program 1 times [2022-11-20 11:42:23,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:23,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016601254] [2022-11-20 11:42:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:23,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:23,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:23,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016601254] [2022-11-20 11:42:23,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016601254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:23,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:23,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:23,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832435551] [2022-11-20 11:42:23,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:23,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:42:23,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:42:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:42:23,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 900 out of 1129 [2022-11-20 11:42:23,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 1129 transitions, 3410 flow. Second operand has 2 states, 2 states have (on average 900.5) internal successors, (1801), 2 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:23,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:23,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 900 of 1129 [2022-11-20 11:42:23,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:42:25,114 INFO L130 PetriNetUnfolder]: 0/2015 cut-off events. [2022-11-20 11:42:25,114 INFO L131 PetriNetUnfolder]: For 6480/6480 co-relation queries the response was YES. [2022-11-20 11:42:25,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2673 conditions, 2015 events. 0/2015 cut-off events. For 6480/6480 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8503 event pairs, 0 based on Foata normal form. 3116/5065 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-11-20 11:42:25,118 INFO L137 encePairwiseOnDemand]: 933/1129 looper letters, 32 selfloop transitions, 0 changer transitions 12/932 dead transitions. [2022-11-20 11:42:25,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 998 places, 932 transitions, 3080 flow [2022-11-20 11:42:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:42:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:42:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2028 transitions. [2022-11-20 11:42:25,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8981399468556245 [2022-11-20 11:42:25,120 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2028 transitions. [2022-11-20 11:42:25,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2028 transitions. [2022-11-20 11:42:25,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:42:25,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2028 transitions. [2022-11-20 11:42:25,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1014.0) internal successors, (2028), 2 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:25,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1129.0) internal successors, (3387), 3 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:25,123 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1129.0) internal successors, (3387), 3 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:25,123 INFO L175 Difference]: Start difference. First operand has 998 places, 1129 transitions, 3410 flow. Second operand 2 states and 2028 transitions. [2022-11-20 11:42:25,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 998 places, 932 transitions, 3080 flow [2022-11-20 11:42:25,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 998 places, 932 transitions, 2088 flow, removed 496 selfloop flow, removed 0 redundant places. [2022-11-20 11:42:25,141 INFO L231 Difference]: Finished difference. Result has 998 places, 920 transitions, 2000 flow [2022-11-20 11:42:25,141 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2000, PETRI_PLACES=998, PETRI_TRANSITIONS=920} [2022-11-20 11:42:25,142 INFO L288 CegarLoopForPetriNet]: 998 programPoint places, 0 predicate places. [2022-11-20 11:42:25,142 INFO L495 AbstractCegarLoop]: Abstraction has has 998 places, 920 transitions, 2000 flow [2022-11-20 11:42:25,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 900.5) internal successors, (1801), 2 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:25,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:25,142 INFO L209 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] [2022-11-20 11:42:25,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-11-20 11:42:25,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:25,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1903437767, now seen corresponding path program 1 times [2022-11-20 11:42:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:25,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386308351] [2022-11-20 11:42:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:25,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:25,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:25,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386308351] [2022-11-20 11:42:25,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386308351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:25,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:25,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:42:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327470535] [2022-11-20 11:42:25,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:25,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:42:25,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:25,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:42:25,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:42:25,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 893 out of 1129 [2022-11-20 11:42:25,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 920 transitions, 2000 flow. Second operand has 3 states, 3 states have (on average 894.0) internal successors, (2682), 3 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:25,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:25,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 893 of 1129 [2022-11-20 11:42:25,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:42:26,884 INFO L130 PetriNetUnfolder]: 0/1606 cut-off events. [2022-11-20 11:42:26,884 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-20 11:42:26,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1933 conditions, 1606 events. 0/1606 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5711 event pairs, 0 based on Foata normal form. 0/1574 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2022-11-20 11:42:26,887 INFO L137 encePairwiseOnDemand]: 1126/1129 looper letters, 41 selfloop transitions, 2 changer transitions 0/924 dead transitions. [2022-11-20 11:42:26,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 988 places, 924 transitions, 2094 flow [2022-11-20 11:42:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:42:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:42:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2723 transitions. [2022-11-20 11:42:26,890 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8039563035134337 [2022-11-20 11:42:26,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2723 transitions. [2022-11-20 11:42:26,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2723 transitions. [2022-11-20 11:42:26,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:42:26,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2723 transitions. [2022-11-20 11:42:26,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 907.6666666666666) internal successors, (2723), 3 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:26,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:26,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:26,896 INFO L175 Difference]: Start difference. First operand has 998 places, 920 transitions, 2000 flow. Second operand 3 states and 2723 transitions. [2022-11-20 11:42:26,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 988 places, 924 transitions, 2094 flow [2022-11-20 11:42:26,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 988 places, 924 transitions, 2094 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:42:26,905 INFO L231 Difference]: Finished difference. Result has 989 places, 921 transitions, 2012 flow [2022-11-20 11:42:26,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=986, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2012, PETRI_PLACES=989, PETRI_TRANSITIONS=921} [2022-11-20 11:42:26,906 INFO L288 CegarLoopForPetriNet]: 998 programPoint places, -9 predicate places. [2022-11-20 11:42:26,906 INFO L495 AbstractCegarLoop]: Abstraction has has 989 places, 921 transitions, 2012 flow [2022-11-20 11:42:26,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 894.0) internal successors, (2682), 3 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:26,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:26,907 INFO L209 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] [2022-11-20 11:42:26,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-11-20 11:42:26,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash 774696576, now seen corresponding path program 1 times [2022-11-20 11:42:26,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:26,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047974644] [2022-11-20 11:42:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:26,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:26,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:26,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047974644] [2022-11-20 11:42:26,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047974644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:42:26,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219546387] [2022-11-20 11:42:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:26,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:26,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:42:26,961 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:42:26,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-20 11:42:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:28,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:42:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:28,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:42:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:28,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219546387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:42:28,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:42:28,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:42:28,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268683996] [2022-11-20 11:42:28,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:42:28,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:42:28,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:42:28,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:42:28,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-11-20 11:42:28,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 989 places, 921 transitions, 2012 flow. Second operand has 10 states, 10 states have (on average 894.3) internal successors, (8943), 10 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:28,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:28,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-11-20 11:42:28,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:42:29,769 INFO L130 PetriNetUnfolder]: 0/1580 cut-off events. [2022-11-20 11:42:29,769 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-20 11:42:29,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1580 events. 0/1580 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5561 event pairs, 0 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-11-20 11:42:29,773 INFO L137 encePairwiseOnDemand]: 1123/1129 looper letters, 42 selfloop transitions, 9 changer transitions 0/931 dead transitions. [2022-11-20 11:42:29,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 997 places, 931 transitions, 2136 flow [2022-11-20 11:42:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:42:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:42:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8081 transitions. [2022-11-20 11:42:29,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7952957386084046 [2022-11-20 11:42:29,781 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8081 transitions. [2022-11-20 11:42:29,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8081 transitions. [2022-11-20 11:42:29,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:42:29,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8081 transitions. [2022-11-20 11:42:29,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 897.8888888888889) internal successors, (8081), 9 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:29,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1129.0) internal successors, (11290), 10 states have internal predecessors, (11290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:29,801 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1129.0) internal successors, (11290), 10 states have internal predecessors, (11290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:29,801 INFO L175 Difference]: Start difference. First operand has 989 places, 921 transitions, 2012 flow. Second operand 9 states and 8081 transitions. [2022-11-20 11:42:29,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 997 places, 931 transitions, 2136 flow [2022-11-20 11:42:29,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 996 places, 931 transitions, 2134 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:42:29,814 INFO L231 Difference]: Finished difference. Result has 999 places, 927 transitions, 2060 flow [2022-11-20 11:42:29,815 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=988, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2060, PETRI_PLACES=999, PETRI_TRANSITIONS=927} [2022-11-20 11:42:29,815 INFO L288 CegarLoopForPetriNet]: 998 programPoint places, 1 predicate places. [2022-11-20 11:42:29,815 INFO L495 AbstractCegarLoop]: Abstraction has has 999 places, 927 transitions, 2060 flow [2022-11-20 11:42:29,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 894.3) internal successors, (8943), 10 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:29,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:29,818 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:29,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-11-20 11:42:30,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:30,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:30,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:30,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1043544629, now seen corresponding path program 1 times [2022-11-20 11:42:30,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:30,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795657959] [2022-11-20 11:42:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:30,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:30,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:30,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795657959] [2022-11-20 11:42:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795657959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:42:30,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287373594] [2022-11-20 11:42:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:30,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:30,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:42:30,108 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:42:30,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-11-20 11:42:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:31,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:42:31,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:31,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:42:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:31,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287373594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:42:31,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:42:31,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:42:31,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354152081] [2022-11-20 11:42:31,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:42:31,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:42:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:42:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:42:31,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-11-20 11:42:31,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 999 places, 927 transitions, 2060 flow. Second operand has 18 states, 18 states have (on average 894.6111111111111) internal successors, (16103), 18 states have internal predecessors, (16103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:31,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:31,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-11-20 11:42:31,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:42:33,170 INFO L130 PetriNetUnfolder]: 0/1528 cut-off events. [2022-11-20 11:42:33,170 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-11-20 11:42:33,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 1528 events. 0/1528 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5219 event pairs, 0 based on Foata normal form. 4/1532 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-11-20 11:42:33,173 INFO L137 encePairwiseOnDemand]: 1123/1129 looper letters, 50 selfloop transitions, 21 changer transitions 0/951 dead transitions. [2022-11-20 11:42:33,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1019 places, 951 transitions, 2310 flow [2022-11-20 11:42:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:42:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:42:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18807 transitions. [2022-11-20 11:42:33,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.793243072251044 [2022-11-20 11:42:33,186 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18807 transitions. [2022-11-20 11:42:33,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18807 transitions. [2022-11-20 11:42:33,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:42:33,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18807 transitions. [2022-11-20 11:42:33,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 895.5714285714286) internal successors, (18807), 21 states have internal predecessors, (18807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:33,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1129.0) internal successors, (24838), 22 states have internal predecessors, (24838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:33,216 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1129.0) internal successors, (24838), 22 states have internal predecessors, (24838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:33,216 INFO L175 Difference]: Start difference. First operand has 999 places, 927 transitions, 2060 flow. Second operand 21 states and 18807 transitions. [2022-11-20 11:42:33,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1019 places, 951 transitions, 2310 flow [2022-11-20 11:42:33,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1018 places, 951 transitions, 2296 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:42:33,227 INFO L231 Difference]: Finished difference. Result has 1023 places, 940 transitions, 2184 flow [2022-11-20 11:42:33,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=998, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2184, PETRI_PLACES=1023, PETRI_TRANSITIONS=940} [2022-11-20 11:42:33,228 INFO L288 CegarLoopForPetriNet]: 998 programPoint places, 25 predicate places. [2022-11-20 11:42:33,228 INFO L495 AbstractCegarLoop]: Abstraction has has 1023 places, 940 transitions, 2184 flow [2022-11-20 11:42:33,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 894.6111111111111) internal successors, (16103), 18 states have internal predecessors, (16103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:33,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:33,230 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:33,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-11-20 11:42:33,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-11-20 11:42:33,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:33,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1608022101, now seen corresponding path program 1 times [2022-11-20 11:42:33,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:33,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359007827] [2022-11-20 11:42:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:33,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:33,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359007827] [2022-11-20 11:42:33,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359007827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:42:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966402509] [2022-11-20 11:42:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:33,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:33,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:42:33,638 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:42:33,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-20 11:42:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:34,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:42:34,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:34,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:42:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966402509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:42:35,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:42:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:42:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811040330] [2022-11-20 11:42:35,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:42:35,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:42:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:42:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:42:35,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-11-20 11:42:35,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1023 places, 940 transitions, 2184 flow. Second operand has 34 states, 34 states have (on average 894.7941176470588) internal successors, (30423), 34 states have internal predecessors, (30423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:35,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:35,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-11-20 11:42:35,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:42:37,519 INFO L130 PetriNetUnfolder]: 0/1424 cut-off events. [2022-11-20 11:42:37,519 INFO L131 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2022-11-20 11:42:37,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2280 conditions, 1424 events. 0/1424 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4548 event pairs, 0 based on Foata normal form. 8/1432 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-11-20 11:42:37,523 INFO L137 encePairwiseOnDemand]: 1123/1129 looper letters, 66 selfloop transitions, 45 changer transitions 0/991 dead transitions. [2022-11-20 11:42:37,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1067 places, 991 transitions, 2722 flow [2022-11-20 11:42:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:42:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:42:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 40259 transitions. [2022-11-20 11:42:37,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7924220057080996 [2022-11-20 11:42:37,545 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 40259 transitions. [2022-11-20 11:42:37,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 40259 transitions. [2022-11-20 11:42:37,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:42:37,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 40259 transitions. [2022-11-20 11:42:37,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 894.6444444444444) internal successors, (40259), 45 states have internal predecessors, (40259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:37,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1129.0) internal successors, (51934), 46 states have internal predecessors, (51934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:37,603 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1129.0) internal successors, (51934), 46 states have internal predecessors, (51934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:37,603 INFO L175 Difference]: Start difference. First operand has 1023 places, 940 transitions, 2184 flow. Second operand 45 states and 40259 transitions. [2022-11-20 11:42:37,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1067 places, 991 transitions, 2722 flow [2022-11-20 11:42:37,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1061 places, 991 transitions, 2682 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:42:37,620 INFO L231 Difference]: Finished difference. Result has 1070 places, 965 transitions, 2462 flow [2022-11-20 11:42:37,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=1017, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=917, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2462, PETRI_PLACES=1070, PETRI_TRANSITIONS=965} [2022-11-20 11:42:37,621 INFO L288 CegarLoopForPetriNet]: 998 programPoint places, 72 predicate places. [2022-11-20 11:42:37,621 INFO L495 AbstractCegarLoop]: Abstraction has has 1070 places, 965 transitions, 2462 flow [2022-11-20 11:42:37,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 894.7941176470588) internal successors, (30423), 34 states have internal predecessors, (30423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:37,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:37,625 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:37,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-20 11:42:37,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:37,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:37,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:37,826 INFO L85 PathProgramCache]: Analyzing trace with hash 312828615, now seen corresponding path program 1 times [2022-11-20 11:42:37,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:37,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074951492] [2022-11-20 11:42:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:37,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:38,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074951492] [2022-11-20 11:42:38,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074951492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:42:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718535267] [2022-11-20 11:42:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:38,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:38,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:42:38,457 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:42:38,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-20 11:42:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:39,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:42:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:39,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:42:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:40,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718535267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:42:40,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:42:40,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:42:40,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455151685] [2022-11-20 11:42:40,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:42:40,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:42:40,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:40,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:42:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:42:41,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-11-20 11:42:41,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1070 places, 965 transitions, 2462 flow. Second operand has 66 states, 66 states have (on average 894.8939393939394) internal successors, (59063), 66 states have internal predecessors, (59063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:41,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:41,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-11-20 11:42:41,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:42:44,329 INFO L130 PetriNetUnfolder]: 0/1216 cut-off events. [2022-11-20 11:42:44,329 INFO L131 PetriNetUnfolder]: For 2345/2345 co-relation queries the response was YES. [2022-11-20 11:42:44,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 1216 events. 0/1216 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3174 event pairs, 0 based on Foata normal form. 16/1232 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-20 11:42:44,331 INFO L137 encePairwiseOnDemand]: 1123/1129 looper letters, 98 selfloop transitions, 93 changer transitions 0/1071 dead transitions. [2022-11-20 11:42:44,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1162 places, 1071 transitions, 3692 flow [2022-11-20 11:42:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:42:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:42:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 83163 transitions. [2022-11-20 11:42:44,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.792051201462899 [2022-11-20 11:42:44,364 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 83163 transitions. [2022-11-20 11:42:44,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 83163 transitions. [2022-11-20 11:42:44,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:42:44,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 83163 transitions. [2022-11-20 11:42:44,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 894.2258064516129) internal successors, (83163), 93 states have internal predecessors, (83163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:44,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1129.0) internal successors, (106126), 94 states have internal predecessors, (106126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:44,483 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1129.0) internal successors, (106126), 94 states have internal predecessors, (106126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:44,483 INFO L175 Difference]: Start difference. First operand has 1070 places, 965 transitions, 2462 flow. Second operand 93 states and 83163 transitions. [2022-11-20 11:42:44,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1162 places, 1071 transitions, 3692 flow [2022-11-20 11:42:44,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1144 places, 1071 transitions, 3604 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:42:44,503 INFO L231 Difference]: Finished difference. Result has 1161 places, 1014 transitions, 3096 flow [2022-11-20 11:42:44,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=1052, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3096, PETRI_PLACES=1161, PETRI_TRANSITIONS=1014} [2022-11-20 11:42:44,504 INFO L288 CegarLoopForPetriNet]: 998 programPoint places, 163 predicate places. [2022-11-20 11:42:44,504 INFO L495 AbstractCegarLoop]: Abstraction has has 1161 places, 1014 transitions, 3096 flow [2022-11-20 11:42:44,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 894.8939393939394) internal successors, (59063), 66 states have internal predecessors, (59063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:44,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:44,511 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:44,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-11-20 11:42:44,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:44,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:44,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:44,712 INFO L85 PathProgramCache]: Analyzing trace with hash -256812609, now seen corresponding path program 1 times [2022-11-20 11:42:44,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:44,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303562088] [2022-11-20 11:42:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:44,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:47,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:47,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303562088] [2022-11-20 11:42:47,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303562088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:42:47,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602402478] [2022-11-20 11:42:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:47,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:42:47,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:42:47,012 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:42:47,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-20 11:42:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:42:48,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:48,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:42:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:52,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602402478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:42:52,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:42:52,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:42:52,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187064551] [2022-11-20 11:42:52,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:42:52,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:42:52,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:42:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:42:52,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-11-20 11:42:52,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1161 places, 1014 transitions, 3096 flow. Second operand has 130 states, 130 states have (on average 894.9461538461538) internal successors, (116343), 130 states have internal predecessors, (116343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:52,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:52,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-11-20 11:42:52,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:42:56,267 INFO L130 PetriNetUnfolder]: 0/1190 cut-off events. [2022-11-20 11:42:56,268 INFO L131 PetriNetUnfolder]: For 1692/1692 co-relation queries the response was YES. [2022-11-20 11:42:56,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148 conditions, 1190 events. 0/1190 cut-off events. For 1692/1692 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3031 event pairs, 0 based on Foata normal form. 2/1192 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-20 11:42:56,269 INFO L137 encePairwiseOnDemand]: 1124/1129 looper letters, 99 selfloop transitions, 97 changer transitions 0/1064 dead transitions. [2022-11-20 11:42:56,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1246 places, 1064 transitions, 3872 flow [2022-11-20 11:42:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-20 11:42:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-11-20 11:42:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 88506 transitions. [2022-11-20 11:42:56,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.79185119574845 [2022-11-20 11:42:56,304 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 88506 transitions. [2022-11-20 11:42:56,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 88506 transitions. [2022-11-20 11:42:56,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:42:56,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 88506 transitions. [2022-11-20 11:42:56,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 894.0) internal successors, (88506), 99 states have internal predecessors, (88506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:56,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 1129.0) internal successors, (112900), 100 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:56,424 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 1129.0) internal successors, (112900), 100 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:56,425 INFO L175 Difference]: Start difference. First operand has 1161 places, 1014 transitions, 3096 flow. Second operand 99 states and 88506 transitions. [2022-11-20 11:42:56,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1246 places, 1064 transitions, 3872 flow [2022-11-20 11:42:56,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1173 places, 1064 transitions, 3540 flow, removed 19 selfloop flow, removed 73 redundant places. [2022-11-20 11:42:56,440 INFO L231 Difference]: Finished difference. Result has 1173 places, 1004 transitions, 2970 flow [2022-11-20 11:42:56,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=2970, PETRI_PLACES=1173, PETRI_TRANSITIONS=1004} [2022-11-20 11:42:56,441 INFO L288 CegarLoopForPetriNet]: 998 programPoint places, 175 predicate places. [2022-11-20 11:42:56,441 INFO L495 AbstractCegarLoop]: Abstraction has has 1173 places, 1004 transitions, 2970 flow [2022-11-20 11:42:56,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 894.9461538461538) internal successors, (116343), 130 states have internal predecessors, (116343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:56,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:56,449 INFO L209 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:56,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-11-20 11:42:56,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2022-11-20 11:42:56,650 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash -320541493, now seen corresponding path program 1 times [2022-11-20 11:42:56,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:56,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446741102] [2022-11-20 11:42:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:56,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:42:56,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:42:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:42:56,802 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:42:56,802 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:42:56,802 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:42:56,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:42:56,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-11-20 11:42:56,803 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:42:56,803 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:42:56,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2022-11-20 11:42:56,891 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:42:56,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1027 places, 1162 transitions, 3545 flow [2022-11-20 11:42:58,398 INFO L130 PetriNetUnfolder]: 334/2444 cut-off events. [2022-11-20 11:42:58,398 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-11-20 11:42:58,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 2444 events. 334/2444 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9232 event pairs, 0 based on Foata normal form. 0/2042 useless extension candidates. Maximal degree in co-relation 2969. Up to 68 conditions per place. [2022-11-20 11:42:58,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 1027 places, 1162 transitions, 3545 flow [2022-11-20 11:42:58,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1027 places, 1162 transitions, 3545 flow [2022-11-20 11:42:58,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:42:58,676 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:42:58,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:42:58,680 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:42:58,680 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:42:58,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:42:58,680 INFO L209 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] [2022-11-20 11:42:58,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:42:58,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:58,681 INFO L85 PathProgramCache]: Analyzing trace with hash 942153222, now seen corresponding path program 1 times [2022-11-20 11:42:58,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:42:58,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547797767] [2022-11-20 11:42:58,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:42:58,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:42:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:42:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:42:58,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:42:58,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547797767] [2022-11-20 11:42:58,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547797767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:42:58,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:42:58,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:42:58,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055381949] [2022-11-20 11:42:58,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:42:58,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:42:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:42:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:42:58,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:42:58,705 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 926 out of 1162 [2022-11-20 11:42:58,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 1162 transitions, 3545 flow. Second operand has 2 states, 2 states have (on average 926.5) internal successors, (1853), 2 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:42:58,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:42:58,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 926 of 1162 [2022-11-20 11:42:58,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:00,389 INFO L130 PetriNetUnfolder]: 0/2076 cut-off events. [2022-11-20 11:43:00,389 INFO L131 PetriNetUnfolder]: For 7073/7073 co-relation queries the response was YES. [2022-11-20 11:43:00,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2771 conditions, 2076 events. 0/2076 cut-off events. For 7073/7073 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8765 event pairs, 0 based on Foata normal form. 3312/5320 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-11-20 11:43:00,394 INFO L137 encePairwiseOnDemand]: 960/1162 looper letters, 33 selfloop transitions, 0 changer transitions 12/959 dead transitions. [2022-11-20 11:43:00,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1027 places, 959 transitions, 3205 flow [2022-11-20 11:43:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:43:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:43:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2087 transitions. [2022-11-20 11:43:00,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8980206540447504 [2022-11-20 11:43:00,396 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2087 transitions. [2022-11-20 11:43:00,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2087 transitions. [2022-11-20 11:43:00,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:00,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2087 transitions. [2022-11-20 11:43:00,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1043.5) internal successors, (2087), 2 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:00,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1162.0) internal successors, (3486), 3 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:00,400 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1162.0) internal successors, (3486), 3 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:00,400 INFO L175 Difference]: Start difference. First operand has 1027 places, 1162 transitions, 3545 flow. Second operand 2 states and 2087 transitions. [2022-11-20 11:43:00,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1027 places, 959 transitions, 3205 flow [2022-11-20 11:43:00,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1027 places, 959 transitions, 2149 flow, removed 528 selfloop flow, removed 0 redundant places. [2022-11-20 11:43:00,418 INFO L231 Difference]: Finished difference. Result has 1027 places, 947 transitions, 2059 flow [2022-11-20 11:43:00,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=1026, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=959, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2059, PETRI_PLACES=1027, PETRI_TRANSITIONS=947} [2022-11-20 11:43:00,419 INFO L288 CegarLoopForPetriNet]: 1027 programPoint places, 0 predicate places. [2022-11-20 11:43:00,419 INFO L495 AbstractCegarLoop]: Abstraction has has 1027 places, 947 transitions, 2059 flow [2022-11-20 11:43:00,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 926.5) internal successors, (1853), 2 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:00,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:00,419 INFO L209 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] [2022-11-20 11:43:00,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-11-20 11:43:00,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash 648750215, now seen corresponding path program 1 times [2022-11-20 11:43:00,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:00,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495139892] [2022-11-20 11:43:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:00,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:00,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:00,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495139892] [2022-11-20 11:43:00,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495139892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:00,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:00,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:00,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700107938] [2022-11-20 11:43:00,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:00,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:43:00,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:43:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:00,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 919 out of 1162 [2022-11-20 11:43:00,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 947 transitions, 2059 flow. Second operand has 3 states, 3 states have (on average 920.0) internal successors, (2760), 3 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:00,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:00,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 919 of 1162 [2022-11-20 11:43:00,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:01,801 INFO L130 PetriNetUnfolder]: 0/1655 cut-off events. [2022-11-20 11:43:01,801 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-20 11:43:01,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 1655 events. 0/1655 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5894 event pairs, 0 based on Foata normal form. 0/1622 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2022-11-20 11:43:01,806 INFO L137 encePairwiseOnDemand]: 1159/1162 looper letters, 42 selfloop transitions, 2 changer transitions 0/951 dead transitions. [2022-11-20 11:43:01,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1017 places, 951 transitions, 2155 flow [2022-11-20 11:43:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:43:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2802 transitions. [2022-11-20 11:43:01,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8037865748709122 [2022-11-20 11:43:01,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2802 transitions. [2022-11-20 11:43:01,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2802 transitions. [2022-11-20 11:43:01,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:01,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2802 transitions. [2022-11-20 11:43:01,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 934.0) internal successors, (2802), 3 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:01,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1162.0) internal successors, (4648), 4 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:01,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1162.0) internal successors, (4648), 4 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:01,814 INFO L175 Difference]: Start difference. First operand has 1027 places, 947 transitions, 2059 flow. Second operand 3 states and 2802 transitions. [2022-11-20 11:43:01,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1017 places, 951 transitions, 2155 flow [2022-11-20 11:43:01,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1017 places, 951 transitions, 2155 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:43:01,824 INFO L231 Difference]: Finished difference. Result has 1018 places, 948 transitions, 2071 flow [2022-11-20 11:43:01,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=1015, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2071, PETRI_PLACES=1018, PETRI_TRANSITIONS=948} [2022-11-20 11:43:01,824 INFO L288 CegarLoopForPetriNet]: 1027 programPoint places, -9 predicate places. [2022-11-20 11:43:01,825 INFO L495 AbstractCegarLoop]: Abstraction has has 1018 places, 948 transitions, 2071 flow [2022-11-20 11:43:01,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 920.0) internal successors, (2760), 3 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:01,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:01,825 INFO L209 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] [2022-11-20 11:43:01,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-11-20 11:43:01,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1321003424, now seen corresponding path program 1 times [2022-11-20 11:43:01,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:01,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405257729] [2022-11-20 11:43:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:01,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:01,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:01,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405257729] [2022-11-20 11:43:01,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405257729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:01,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139460140] [2022-11-20 11:43:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:01,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:01,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:01,871 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:01,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-20 11:43:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:03,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:43:03,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:03,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:03,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139460140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:03,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:03,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:43:03,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081843678] [2022-11-20 11:43:03,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:03,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:43:03,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:03,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:43:03,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:43:03,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-11-20 11:43:03,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1018 places, 948 transitions, 2071 flow. Second operand has 10 states, 10 states have (on average 920.3) internal successors, (9203), 10 states have internal predecessors, (9203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:03,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:03,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-11-20 11:43:03,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:04,640 INFO L130 PetriNetUnfolder]: 0/1629 cut-off events. [2022-11-20 11:43:04,640 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-20 11:43:04,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2065 conditions, 1629 events. 0/1629 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5750 event pairs, 0 based on Foata normal form. 2/1631 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-11-20 11:43:04,644 INFO L137 encePairwiseOnDemand]: 1156/1162 looper letters, 43 selfloop transitions, 9 changer transitions 0/958 dead transitions. [2022-11-20 11:43:04,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1026 places, 958 transitions, 2197 flow [2022-11-20 11:43:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:43:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:43:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8316 transitions. [2022-11-20 11:43:04,649 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7951807228915663 [2022-11-20 11:43:04,650 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8316 transitions. [2022-11-20 11:43:04,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8316 transitions. [2022-11-20 11:43:04,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:04,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8316 transitions. [2022-11-20 11:43:04,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:04,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1162.0) internal successors, (11620), 10 states have internal predecessors, (11620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:04,663 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1162.0) internal successors, (11620), 10 states have internal predecessors, (11620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:04,663 INFO L175 Difference]: Start difference. First operand has 1018 places, 948 transitions, 2071 flow. Second operand 9 states and 8316 transitions. [2022-11-20 11:43:04,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1026 places, 958 transitions, 2197 flow [2022-11-20 11:43:04,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1025 places, 958 transitions, 2195 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:43:04,673 INFO L231 Difference]: Finished difference. Result has 1028 places, 954 transitions, 2119 flow [2022-11-20 11:43:04,673 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=1017, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2119, PETRI_PLACES=1028, PETRI_TRANSITIONS=954} [2022-11-20 11:43:04,674 INFO L288 CegarLoopForPetriNet]: 1027 programPoint places, 1 predicate places. [2022-11-20 11:43:04,674 INFO L495 AbstractCegarLoop]: Abstraction has has 1028 places, 954 transitions, 2119 flow [2022-11-20 11:43:04,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 920.3) internal successors, (9203), 10 states have internal predecessors, (9203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:04,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:04,675 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:04,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:04,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-11-20 11:43:04,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:04,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:04,876 INFO L85 PathProgramCache]: Analyzing trace with hash 126077461, now seen corresponding path program 1 times [2022-11-20 11:43:04,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:04,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850352165] [2022-11-20 11:43:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:04,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:04,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850352165] [2022-11-20 11:43:04,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850352165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140423458] [2022-11-20 11:43:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:04,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:04,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:04,969 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:04,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-20 11:43:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:06,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:43:06,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:06,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:06,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140423458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:06,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:06,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:43:06,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261111728] [2022-11-20 11:43:06,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:06,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:43:06,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:06,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:43:06,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:43:06,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-11-20 11:43:06,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1028 places, 954 transitions, 2119 flow. Second operand has 18 states, 18 states have (on average 920.6111111111111) internal successors, (16571), 18 states have internal predecessors, (16571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:06,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:06,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-11-20 11:43:06,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:08,230 INFO L130 PetriNetUnfolder]: 0/1577 cut-off events. [2022-11-20 11:43:08,230 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-11-20 11:43:08,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 1577 events. 0/1577 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5407 event pairs, 0 based on Foata normal form. 4/1581 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-11-20 11:43:08,233 INFO L137 encePairwiseOnDemand]: 1156/1162 looper letters, 51 selfloop transitions, 21 changer transitions 0/978 dead transitions. [2022-11-20 11:43:08,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1048 places, 978 transitions, 2371 flow [2022-11-20 11:43:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:43:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:43:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19354 transitions. [2022-11-20 11:43:08,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7931317105155316 [2022-11-20 11:43:08,245 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19354 transitions. [2022-11-20 11:43:08,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19354 transitions. [2022-11-20 11:43:08,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:08,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19354 transitions. [2022-11-20 11:43:08,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 921.6190476190476) internal successors, (19354), 21 states have internal predecessors, (19354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:08,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1162.0) internal successors, (25564), 22 states have internal predecessors, (25564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:08,275 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1162.0) internal successors, (25564), 22 states have internal predecessors, (25564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:08,275 INFO L175 Difference]: Start difference. First operand has 1028 places, 954 transitions, 2119 flow. Second operand 21 states and 19354 transitions. [2022-11-20 11:43:08,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1048 places, 978 transitions, 2371 flow [2022-11-20 11:43:08,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1047 places, 978 transitions, 2357 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:43:08,286 INFO L231 Difference]: Finished difference. Result has 1052 places, 967 transitions, 2243 flow [2022-11-20 11:43:08,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2113, PETRI_DIFFERENCE_MINUEND_PLACES=1027, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2243, PETRI_PLACES=1052, PETRI_TRANSITIONS=967} [2022-11-20 11:43:08,287 INFO L288 CegarLoopForPetriNet]: 1027 programPoint places, 25 predicate places. [2022-11-20 11:43:08,287 INFO L495 AbstractCegarLoop]: Abstraction has has 1052 places, 967 transitions, 2243 flow [2022-11-20 11:43:08,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 920.6111111111111) internal successors, (16571), 18 states have internal predecessors, (16571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:08,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:08,289 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:08,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:08,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-11-20 11:43:08,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash 211525899, now seen corresponding path program 1 times [2022-11-20 11:43:08,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:08,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548844824] [2022-11-20 11:43:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:08,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:08,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548844824] [2022-11-20 11:43:08,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548844824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:08,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893480752] [2022-11-20 11:43:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:08,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:08,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:08,717 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:08,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-20 11:43:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:43:09,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:10,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:10,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893480752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:10,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:10,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:43:10,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952671422] [2022-11-20 11:43:10,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:10,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:43:10,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:43:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:43:10,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-11-20 11:43:10,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1052 places, 967 transitions, 2243 flow. Second operand has 34 states, 34 states have (on average 920.7941176470588) internal successors, (31307), 34 states have internal predecessors, (31307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:10,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:10,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-11-20 11:43:10,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:12,435 INFO L130 PetriNetUnfolder]: 0/1473 cut-off events. [2022-11-20 11:43:12,435 INFO L131 PetriNetUnfolder]: For 762/762 co-relation queries the response was YES. [2022-11-20 11:43:12,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2359 conditions, 1473 events. 0/1473 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4732 event pairs, 0 based on Foata normal form. 8/1481 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-11-20 11:43:12,438 INFO L137 encePairwiseOnDemand]: 1156/1162 looper letters, 67 selfloop transitions, 45 changer transitions 0/1018 dead transitions. [2022-11-20 11:43:12,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1096 places, 1018 transitions, 2783 flow [2022-11-20 11:43:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:43:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:43:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 41430 transitions. [2022-11-20 11:43:12,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7923121055651177 [2022-11-20 11:43:12,458 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 41430 transitions. [2022-11-20 11:43:12,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 41430 transitions. [2022-11-20 11:43:12,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:12,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 41430 transitions. [2022-11-20 11:43:12,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 920.6666666666666) internal successors, (41430), 45 states have internal predecessors, (41430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1162.0) internal successors, (53452), 46 states have internal predecessors, (53452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,515 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1162.0) internal successors, (53452), 46 states have internal predecessors, (53452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,515 INFO L175 Difference]: Start difference. First operand has 1052 places, 967 transitions, 2243 flow. Second operand 45 states and 41430 transitions. [2022-11-20 11:43:12,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1096 places, 1018 transitions, 2783 flow [2022-11-20 11:43:12,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1090 places, 1018 transitions, 2743 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:43:12,529 INFO L231 Difference]: Finished difference. Result has 1099 places, 992 transitions, 2521 flow [2022-11-20 11:43:12,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=1046, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2521, PETRI_PLACES=1099, PETRI_TRANSITIONS=992} [2022-11-20 11:43:12,530 INFO L288 CegarLoopForPetriNet]: 1027 programPoint places, 72 predicate places. [2022-11-20 11:43:12,530 INFO L495 AbstractCegarLoop]: Abstraction has has 1099 places, 992 transitions, 2521 flow [2022-11-20 11:43:12,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 920.7941176470588) internal successors, (31307), 34 states have internal predecessors, (31307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:12,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:12,536 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:12,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-11-20 11:43:12,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:12,742 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:12,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1691742425, now seen corresponding path program 1 times [2022-11-20 11:43:12,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:12,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616998240] [2022-11-20 11:43:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:13,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:13,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616998240] [2022-11-20 11:43:13,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616998240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:13,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000728279] [2022-11-20 11:43:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:13,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:13,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:13,361 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:13,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-20 11:43:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:43:14,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:14,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:16,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000728279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:16,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:16,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:43:16,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861576426] [2022-11-20 11:43:16,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:16,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:43:16,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:16,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:43:16,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:43:16,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-11-20 11:43:16,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1099 places, 992 transitions, 2521 flow. Second operand has 66 states, 66 states have (on average 920.8939393939394) internal successors, (60779), 66 states have internal predecessors, (60779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:16,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:16,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-11-20 11:43:16,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:19,526 INFO L130 PetriNetUnfolder]: 0/1265 cut-off events. [2022-11-20 11:43:19,526 INFO L131 PetriNetUnfolder]: For 2466/2466 co-relation queries the response was YES. [2022-11-20 11:43:19,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1265 events. 0/1265 cut-off events. For 2466/2466 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3357 event pairs, 0 based on Foata normal form. 16/1281 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-11-20 11:43:19,529 INFO L137 encePairwiseOnDemand]: 1156/1162 looper letters, 99 selfloop transitions, 93 changer transitions 0/1098 dead transitions. [2022-11-20 11:43:19,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1191 places, 1098 transitions, 3753 flow [2022-11-20 11:43:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:43:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:43:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 85582 transitions. [2022-11-20 11:43:19,571 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791941961393963 [2022-11-20 11:43:19,572 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 85582 transitions. [2022-11-20 11:43:19,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 85582 transitions. [2022-11-20 11:43:19,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:19,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 85582 transitions. [2022-11-20 11:43:19,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 920.236559139785) internal successors, (85582), 93 states have internal predecessors, (85582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:19,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1162.0) internal successors, (109228), 94 states have internal predecessors, (109228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:19,712 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1162.0) internal successors, (109228), 94 states have internal predecessors, (109228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:19,712 INFO L175 Difference]: Start difference. First operand has 1099 places, 992 transitions, 2521 flow. Second operand 93 states and 85582 transitions. [2022-11-20 11:43:19,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1191 places, 1098 transitions, 3753 flow [2022-11-20 11:43:19,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1173 places, 1098 transitions, 3665 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:43:19,736 INFO L231 Difference]: Finished difference. Result has 1190 places, 1041 transitions, 3155 flow [2022-11-20 11:43:19,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=1081, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3155, PETRI_PLACES=1190, PETRI_TRANSITIONS=1041} [2022-11-20 11:43:19,737 INFO L288 CegarLoopForPetriNet]: 1027 programPoint places, 163 predicate places. [2022-11-20 11:43:19,737 INFO L495 AbstractCegarLoop]: Abstraction has has 1190 places, 1041 transitions, 3155 flow [2022-11-20 11:43:19,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 920.8939393939394) internal successors, (60779), 66 states have internal predecessors, (60779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:19,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:19,745 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:19,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-11-20 11:43:19,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-11-20 11:43:19,945 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:19,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1031984097, now seen corresponding path program 1 times [2022-11-20 11:43:19,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:19,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724963456] [2022-11-20 11:43:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:19,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:22,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:22,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724963456] [2022-11-20 11:43:22,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724963456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:22,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531023248] [2022-11-20 11:43:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:22,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:22,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:22,352 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:22,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-20 11:43:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:43:23,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:24,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:27,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531023248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:27,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:27,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:43:27,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614838450] [2022-11-20 11:43:27,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:27,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:43:27,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:43:27,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:43:27,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-11-20 11:43:27,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1190 places, 1041 transitions, 3155 flow. Second operand has 130 states, 130 states have (on average 920.9461538461538) internal successors, (119723), 130 states have internal predecessors, (119723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:27,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-11-20 11:43:27,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:31,661 INFO L130 PetriNetUnfolder]: 0/1226 cut-off events. [2022-11-20 11:43:31,661 INFO L131 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2022-11-20 11:43:31,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2216 conditions, 1226 events. 0/1226 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3129 event pairs, 0 based on Foata normal form. 3/1229 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-11-20 11:43:31,663 INFO L137 encePairwiseOnDemand]: 1157/1162 looper letters, 102 selfloop transitions, 100 changer transitions 0/1096 dead transitions. [2022-11-20 11:43:31,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1278 places, 1096 transitions, 3997 flow [2022-11-20 11:43:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-20 11:43:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-11-20 11:43:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 93841 transitions. [2022-11-20 11:43:31,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7917468192096115 [2022-11-20 11:43:31,701 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 93841 transitions. [2022-11-20 11:43:31,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 93841 transitions. [2022-11-20 11:43:31,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:31,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 93841 transitions. [2022-11-20 11:43:31,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 920.0098039215686) internal successors, (93841), 102 states have internal predecessors, (93841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:31,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 1162.0) internal successors, (119686), 103 states have internal predecessors, (119686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:31,831 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 1162.0) internal successors, (119686), 103 states have internal predecessors, (119686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:31,831 INFO L175 Difference]: Start difference. First operand has 1190 places, 1041 transitions, 3155 flow. Second operand 102 states and 93841 transitions. [2022-11-20 11:43:31,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1278 places, 1096 transitions, 3997 flow [2022-11-20 11:43:31,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1205 places, 1096 transitions, 3655 flow, removed 20 selfloop flow, removed 73 redundant places. [2022-11-20 11:43:31,848 INFO L231 Difference]: Finished difference. Result has 1205 places, 1034 transitions, 3063 flow [2022-11-20 11:43:31,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=3063, PETRI_PLACES=1205, PETRI_TRANSITIONS=1034} [2022-11-20 11:43:31,849 INFO L288 CegarLoopForPetriNet]: 1027 programPoint places, 178 predicate places. [2022-11-20 11:43:31,849 INFO L495 AbstractCegarLoop]: Abstraction has has 1205 places, 1034 transitions, 3063 flow [2022-11-20 11:43:31,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 920.9461538461538) internal successors, (119723), 130 states have internal predecessors, (119723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:31,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:31,858 INFO L209 CegarLoopForPetriNet]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:31,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-20 11:43:32,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-11-20 11:43:32,058 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1377354468, now seen corresponding path program 1 times [2022-11-20 11:43:32,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:32,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688516153] [2022-11-20 11:43:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:32,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:43:32,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:43:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:43:32,246 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:43:32,246 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:43:32,246 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:43:32,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:43:32,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-11-20 11:43:32,247 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:32,247 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:43:32,247 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2022-11-20 11:43:32,346 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:43:32,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1056 places, 1195 transitions, 3682 flow [2022-11-20 11:43:34,406 INFO L130 PetriNetUnfolder]: 344/2516 cut-off events. [2022-11-20 11:43:34,406 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2022-11-20 11:43:34,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3214 conditions, 2516 events. 344/2516 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9548 event pairs, 0 based on Foata normal form. 0/2102 useless extension candidates. Maximal degree in co-relation 3077. Up to 70 conditions per place. [2022-11-20 11:43:34,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 1056 places, 1195 transitions, 3682 flow [2022-11-20 11:43:34,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1056 places, 1195 transitions, 3682 flow [2022-11-20 11:43:34,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:43:34,574 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:43:34,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:43:34,579 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:43:34,579 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:43:34,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:34,579 INFO L209 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] [2022-11-20 11:43:34,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:34,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1426002342, now seen corresponding path program 1 times [2022-11-20 11:43:34,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:34,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782273688] [2022-11-20 11:43:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:34,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:34,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782273688] [2022-11-20 11:43:34,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782273688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:34,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:34,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:34,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68118364] [2022-11-20 11:43:34,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:34,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:43:34,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:43:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:43:34,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 952 out of 1195 [2022-11-20 11:43:34,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1056 places, 1195 transitions, 3682 flow. Second operand has 2 states, 2 states have (on average 952.5) internal successors, (1905), 2 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:34,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:34,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 952 of 1195 [2022-11-20 11:43:34,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:36,037 INFO L130 PetriNetUnfolder]: 0/2137 cut-off events. [2022-11-20 11:43:36,037 INFO L131 PetriNetUnfolder]: For 7701/7701 co-relation queries the response was YES. [2022-11-20 11:43:36,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 2137 events. 0/2137 cut-off events. For 7701/7701 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9020 event pairs, 0 based on Foata normal form. 3514/5581 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-20 11:43:36,041 INFO L137 encePairwiseOnDemand]: 987/1195 looper letters, 34 selfloop transitions, 0 changer transitions 12/986 dead transitions. [2022-11-20 11:43:36,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1056 places, 986 transitions, 3332 flow [2022-11-20 11:43:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:43:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:43:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2146 transitions. [2022-11-20 11:43:36,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.897907949790795 [2022-11-20 11:43:36,043 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2146 transitions. [2022-11-20 11:43:36,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2146 transitions. [2022-11-20 11:43:36,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:36,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2146 transitions. [2022-11-20 11:43:36,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1073.0) internal successors, (2146), 2 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:36,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1195.0) internal successors, (3585), 3 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:36,046 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1195.0) internal successors, (3585), 3 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:36,046 INFO L175 Difference]: Start difference. First operand has 1056 places, 1195 transitions, 3682 flow. Second operand 2 states and 2146 transitions. [2022-11-20 11:43:36,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1056 places, 986 transitions, 3332 flow [2022-11-20 11:43:36,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1056 places, 986 transitions, 2210 flow, removed 561 selfloop flow, removed 0 redundant places. [2022-11-20 11:43:36,065 INFO L231 Difference]: Finished difference. Result has 1056 places, 974 transitions, 2118 flow [2022-11-20 11:43:36,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=1055, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=986, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2118, PETRI_PLACES=1056, PETRI_TRANSITIONS=974} [2022-11-20 11:43:36,066 INFO L288 CegarLoopForPetriNet]: 1056 programPoint places, 0 predicate places. [2022-11-20 11:43:36,066 INFO L495 AbstractCegarLoop]: Abstraction has has 1056 places, 974 transitions, 2118 flow [2022-11-20 11:43:36,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 952.5) internal successors, (1905), 2 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:36,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:36,066 INFO L209 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] [2022-11-20 11:43:36,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-11-20 11:43:36,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1132599335, now seen corresponding path program 1 times [2022-11-20 11:43:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:36,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520454831] [2022-11-20 11:43:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:36,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:36,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:36,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520454831] [2022-11-20 11:43:36,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520454831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:36,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:36,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:36,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913156983] [2022-11-20 11:43:36,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:36,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:43:36,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:36,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:43:36,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:36,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 945 out of 1195 [2022-11-20 11:43:36,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1056 places, 974 transitions, 2118 flow. Second operand has 3 states, 3 states have (on average 946.0) internal successors, (2838), 3 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:36,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:36,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 945 of 1195 [2022-11-20 11:43:36,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:37,379 INFO L130 PetriNetUnfolder]: 0/1704 cut-off events. [2022-11-20 11:43:37,379 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-20 11:43:37,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 1704 events. 0/1704 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6077 event pairs, 0 based on Foata normal form. 0/1670 useless extension candidates. Maximal degree in co-relation 0. Up to 204 conditions per place. [2022-11-20 11:43:37,383 INFO L137 encePairwiseOnDemand]: 1192/1195 looper letters, 43 selfloop transitions, 2 changer transitions 0/978 dead transitions. [2022-11-20 11:43:37,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1046 places, 978 transitions, 2216 flow [2022-11-20 11:43:37,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:43:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2881 transitions. [2022-11-20 11:43:37,385 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.803626220362622 [2022-11-20 11:43:37,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2881 transitions. [2022-11-20 11:43:37,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2881 transitions. [2022-11-20 11:43:37,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:37,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2881 transitions. [2022-11-20 11:43:37,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 960.3333333333334) internal successors, (2881), 3 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:37,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1195.0) internal successors, (4780), 4 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:37,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1195.0) internal successors, (4780), 4 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:37,389 INFO L175 Difference]: Start difference. First operand has 1056 places, 974 transitions, 2118 flow. Second operand 3 states and 2881 transitions. [2022-11-20 11:43:37,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1046 places, 978 transitions, 2216 flow [2022-11-20 11:43:37,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1046 places, 978 transitions, 2216 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:43:37,398 INFO L231 Difference]: Finished difference. Result has 1047 places, 975 transitions, 2130 flow [2022-11-20 11:43:37,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=1044, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2130, PETRI_PLACES=1047, PETRI_TRANSITIONS=975} [2022-11-20 11:43:37,399 INFO L288 CegarLoopForPetriNet]: 1056 programPoint places, -9 predicate places. [2022-11-20 11:43:37,399 INFO L495 AbstractCegarLoop]: Abstraction has has 1047 places, 975 transitions, 2130 flow [2022-11-20 11:43:37,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 946.0) internal successors, (2838), 3 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:37,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:37,399 INFO L209 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] [2022-11-20 11:43:37,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-11-20 11:43:37,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash 842827840, now seen corresponding path program 1 times [2022-11-20 11:43:37,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:37,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271687806] [2022-11-20 11:43:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:37,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:37,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:37,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271687806] [2022-11-20 11:43:37,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271687806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:37,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380878939] [2022-11-20 11:43:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:37,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:37,447 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:37,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-11-20 11:43:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:38,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:43:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:38,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:38,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380878939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:38,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:38,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:43:38,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341744915] [2022-11-20 11:43:38,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:43:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:43:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:43:38,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-11-20 11:43:38,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 975 transitions, 2130 flow. Second operand has 10 states, 10 states have (on average 946.3) internal successors, (9463), 10 states have internal predecessors, (9463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:38,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:38,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-11-20 11:43:38,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:40,137 INFO L130 PetriNetUnfolder]: 0/1678 cut-off events. [2022-11-20 11:43:40,137 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-20 11:43:40,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2127 conditions, 1678 events. 0/1678 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5945 event pairs, 0 based on Foata normal form. 2/1680 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2022-11-20 11:43:40,142 INFO L137 encePairwiseOnDemand]: 1189/1195 looper letters, 44 selfloop transitions, 9 changer transitions 0/985 dead transitions. [2022-11-20 11:43:40,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1055 places, 985 transitions, 2258 flow [2022-11-20 11:43:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:43:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:43:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8551 transitions. [2022-11-20 11:43:40,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7950720595072059 [2022-11-20 11:43:40,147 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8551 transitions. [2022-11-20 11:43:40,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8551 transitions. [2022-11-20 11:43:40,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:40,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8551 transitions. [2022-11-20 11:43:40,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 950.1111111111111) internal successors, (8551), 9 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:40,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1195.0) internal successors, (11950), 10 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:40,159 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1195.0) internal successors, (11950), 10 states have internal predecessors, (11950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:40,159 INFO L175 Difference]: Start difference. First operand has 1047 places, 975 transitions, 2130 flow. Second operand 9 states and 8551 transitions. [2022-11-20 11:43:40,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1055 places, 985 transitions, 2258 flow [2022-11-20 11:43:40,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1054 places, 985 transitions, 2256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:43:40,168 INFO L231 Difference]: Finished difference. Result has 1057 places, 981 transitions, 2178 flow [2022-11-20 11:43:40,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=1046, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=969, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2178, PETRI_PLACES=1057, PETRI_TRANSITIONS=981} [2022-11-20 11:43:40,169 INFO L288 CegarLoopForPetriNet]: 1056 programPoint places, 1 predicate places. [2022-11-20 11:43:40,169 INFO L495 AbstractCegarLoop]: Abstraction has has 1057 places, 981 transitions, 2178 flow [2022-11-20 11:43:40,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 946.3) internal successors, (9463), 10 states have internal predecessors, (9463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:40,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:40,170 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:40,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:40,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-11-20 11:43:40,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:40,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1370980021, now seen corresponding path program 1 times [2022-11-20 11:43:40,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:40,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320158879] [2022-11-20 11:43:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:40,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:40,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320158879] [2022-11-20 11:43:40,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320158879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:40,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493816409] [2022-11-20 11:43:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:40,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:40,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:40,449 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:40,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-20 11:43:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:41,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:43:41,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:41,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:41,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493816409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:41,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:41,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:43:41,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615074013] [2022-11-20 11:43:41,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:41,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:43:41,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:43:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:43:41,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-11-20 11:43:41,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1057 places, 981 transitions, 2178 flow. Second operand has 18 states, 18 states have (on average 946.6111111111111) internal successors, (17039), 18 states have internal predecessors, (17039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:41,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:41,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-11-20 11:43:41,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:43,453 INFO L130 PetriNetUnfolder]: 0/1626 cut-off events. [2022-11-20 11:43:43,453 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-11-20 11:43:43,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2328 conditions, 1626 events. 0/1626 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5584 event pairs, 0 based on Foata normal form. 4/1630 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-11-20 11:43:43,456 INFO L137 encePairwiseOnDemand]: 1189/1195 looper letters, 52 selfloop transitions, 21 changer transitions 0/1005 dead transitions. [2022-11-20 11:43:43,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1077 places, 1005 transitions, 2432 flow [2022-11-20 11:43:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:43:43,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:43:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19901 transitions. [2022-11-20 11:43:43,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7930264993026499 [2022-11-20 11:43:43,467 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19901 transitions. [2022-11-20 11:43:43,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19901 transitions. [2022-11-20 11:43:43,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:43,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19901 transitions. [2022-11-20 11:43:43,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 947.6666666666666) internal successors, (19901), 21 states have internal predecessors, (19901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:43,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1195.0) internal successors, (26290), 22 states have internal predecessors, (26290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:43,494 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1195.0) internal successors, (26290), 22 states have internal predecessors, (26290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:43,494 INFO L175 Difference]: Start difference. First operand has 1057 places, 981 transitions, 2178 flow. Second operand 21 states and 19901 transitions. [2022-11-20 11:43:43,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1077 places, 1005 transitions, 2432 flow [2022-11-20 11:43:43,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1076 places, 1005 transitions, 2418 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:43:43,503 INFO L231 Difference]: Finished difference. Result has 1081 places, 994 transitions, 2302 flow [2022-11-20 11:43:43,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=1056, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2302, PETRI_PLACES=1081, PETRI_TRANSITIONS=994} [2022-11-20 11:43:43,504 INFO L288 CegarLoopForPetriNet]: 1056 programPoint places, 25 predicate places. [2022-11-20 11:43:43,504 INFO L495 AbstractCegarLoop]: Abstraction has has 1081 places, 994 transitions, 2302 flow [2022-11-20 11:43:43,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 946.6111111111111) internal successors, (17039), 18 states have internal predecessors, (17039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:43,505 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:43,505 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:43,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-20 11:43:43,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-11-20 11:43:43,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:43,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:43,706 INFO L85 PathProgramCache]: Analyzing trace with hash -419266133, now seen corresponding path program 1 times [2022-11-20 11:43:43,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:43,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858738387] [2022-11-20 11:43:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:43,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:43,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:43,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858738387] [2022-11-20 11:43:43,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858738387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:43,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422796680] [2022-11-20 11:43:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:43,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:43,898 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:43,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-20 11:43:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:45,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:43:45,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:45,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:45,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422796680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:45,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:45,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:43:45,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026655840] [2022-11-20 11:43:45,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:45,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:43:45,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:45,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:43:45,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:43:45,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-11-20 11:43:45,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1081 places, 994 transitions, 2302 flow. Second operand has 34 states, 34 states have (on average 946.7941176470588) internal successors, (32191), 34 states have internal predecessors, (32191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:45,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:45,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-11-20 11:43:45,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:47,472 INFO L130 PetriNetUnfolder]: 0/1522 cut-off events. [2022-11-20 11:43:47,472 INFO L131 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-11-20 11:43:47,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 1522 events. 0/1522 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4903 event pairs, 0 based on Foata normal form. 8/1530 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-11-20 11:43:47,475 INFO L137 encePairwiseOnDemand]: 1189/1195 looper letters, 68 selfloop transitions, 45 changer transitions 0/1045 dead transitions. [2022-11-20 11:43:47,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1125 places, 1045 transitions, 2844 flow [2022-11-20 11:43:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:43:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:43:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 42601 transitions. [2022-11-20 11:43:47,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922082752208275 [2022-11-20 11:43:47,494 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 42601 transitions. [2022-11-20 11:43:47,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 42601 transitions. [2022-11-20 11:43:47,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:47,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 42601 transitions. [2022-11-20 11:43:47,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 946.6888888888889) internal successors, (42601), 45 states have internal predecessors, (42601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:47,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1195.0) internal successors, (54970), 46 states have internal predecessors, (54970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:47,552 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1195.0) internal successors, (54970), 46 states have internal predecessors, (54970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:47,552 INFO L175 Difference]: Start difference. First operand has 1081 places, 994 transitions, 2302 flow. Second operand 45 states and 42601 transitions. [2022-11-20 11:43:47,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1125 places, 1045 transitions, 2844 flow [2022-11-20 11:43:47,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1119 places, 1045 transitions, 2804 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:43:47,566 INFO L231 Difference]: Finished difference. Result has 1128 places, 1019 transitions, 2580 flow [2022-11-20 11:43:47,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=971, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2580, PETRI_PLACES=1128, PETRI_TRANSITIONS=1019} [2022-11-20 11:43:47,566 INFO L288 CegarLoopForPetriNet]: 1056 programPoint places, 72 predicate places. [2022-11-20 11:43:47,566 INFO L495 AbstractCegarLoop]: Abstraction has has 1128 places, 1019 transitions, 2580 flow [2022-11-20 11:43:47,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 946.7941176470588) internal successors, (32191), 34 states have internal predecessors, (32191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:47,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:47,570 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:47,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:47,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-11-20 11:43:47,770 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1423751225, now seen corresponding path program 1 times [2022-11-20 11:43:47,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:47,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136544194] [2022-11-20 11:43:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:47,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:48,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136544194] [2022-11-20 11:43:48,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136544194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:48,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990211135] [2022-11-20 11:43:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:48,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:48,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:48,399 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:48,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-11-20 11:43:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:43:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:49,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:50,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990211135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:50,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:50,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:43:50,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433331858] [2022-11-20 11:43:50,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:50,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:43:50,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:50,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:43:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:43:50,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-11-20 11:43:50,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1128 places, 1019 transitions, 2580 flow. Second operand has 66 states, 66 states have (on average 946.8939393939394) internal successors, (62495), 66 states have internal predecessors, (62495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:50,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:50,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-11-20 11:43:50,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:54,190 INFO L130 PetriNetUnfolder]: 0/1314 cut-off events. [2022-11-20 11:43:54,190 INFO L131 PetriNetUnfolder]: For 2587/2587 co-relation queries the response was YES. [2022-11-20 11:43:54,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2283 conditions, 1314 events. 0/1314 cut-off events. For 2587/2587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3543 event pairs, 0 based on Foata normal form. 16/1330 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-11-20 11:43:54,193 INFO L137 encePairwiseOnDemand]: 1189/1195 looper letters, 100 selfloop transitions, 93 changer transitions 0/1125 dead transitions. [2022-11-20 11:43:54,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1220 places, 1125 transitions, 3814 flow [2022-11-20 11:43:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:43:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:43:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 88001 transitions. [2022-11-20 11:43:54,228 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7918387546677464 [2022-11-20 11:43:54,228 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 88001 transitions. [2022-11-20 11:43:54,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 88001 transitions. [2022-11-20 11:43:54,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:54,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 88001 transitions. [2022-11-20 11:43:54,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 946.247311827957) internal successors, (88001), 93 states have internal predecessors, (88001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:54,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1195.0) internal successors, (112330), 94 states have internal predecessors, (112330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:54,347 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1195.0) internal successors, (112330), 94 states have internal predecessors, (112330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:54,347 INFO L175 Difference]: Start difference. First operand has 1128 places, 1019 transitions, 2580 flow. Second operand 93 states and 88001 transitions. [2022-11-20 11:43:54,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1220 places, 1125 transitions, 3814 flow [2022-11-20 11:43:54,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1202 places, 1125 transitions, 3726 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:43:54,366 INFO L231 Difference]: Finished difference. Result has 1219 places, 1068 transitions, 3214 flow [2022-11-20 11:43:54,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=1110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3214, PETRI_PLACES=1219, PETRI_TRANSITIONS=1068} [2022-11-20 11:43:54,367 INFO L288 CegarLoopForPetriNet]: 1056 programPoint places, 163 predicate places. [2022-11-20 11:43:54,367 INFO L495 AbstractCegarLoop]: Abstraction has has 1219 places, 1068 transitions, 3214 flow [2022-11-20 11:43:54,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 946.8939393939394) internal successors, (62495), 66 states have internal predecessors, (62495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:54,373 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:54,374 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:54,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-11-20 11:43:54,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-11-20 11:43:54,582 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:43:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:54,582 INFO L85 PathProgramCache]: Analyzing trace with hash -498395969, now seen corresponding path program 1 times [2022-11-20 11:43:54,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:54,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979963110] [2022-11-20 11:43:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:54,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979963110] [2022-11-20 11:43:56,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979963110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618568467] [2022-11-20 11:43:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:56,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:56,815 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:56,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-20 11:43:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:58,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:43:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:58,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:02,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618568467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:02,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:02,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:44:02,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773087424] [2022-11-20 11:44:02,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:02,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:44:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:44:02,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:44:02,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 944 out of 1195 [2022-11-20 11:44:02,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1219 places, 1068 transitions, 3214 flow. Second operand has 130 states, 130 states have (on average 946.9461538461538) internal successors, (123103), 130 states have internal predecessors, (123103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:02,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:02,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 944 of 1195 [2022-11-20 11:44:02,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:06,396 INFO L130 PetriNetUnfolder]: 0/1262 cut-off events. [2022-11-20 11:44:06,396 INFO L131 PetriNetUnfolder]: For 2686/2686 co-relation queries the response was YES. [2022-11-20 11:44:06,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 1262 events. 0/1262 cut-off events. For 2686/2686 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3227 event pairs, 0 based on Foata normal form. 4/1266 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-11-20 11:44:06,398 INFO L137 encePairwiseOnDemand]: 1190/1195 looper letters, 105 selfloop transitions, 103 changer transitions 0/1128 dead transitions. [2022-11-20 11:44:06,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1310 places, 1128 transitions, 4122 flow [2022-11-20 11:44:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-20 11:44:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-11-20 11:44:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 99332 transitions. [2022-11-20 11:44:06,438 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916477385933453 [2022-11-20 11:44:06,438 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 99332 transitions. [2022-11-20 11:44:06,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 99332 transitions. [2022-11-20 11:44:06,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:06,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 99332 transitions. [2022-11-20 11:44:06,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 946.0190476190476) internal successors, (99332), 105 states have internal predecessors, (99332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:06,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 1195.0) internal successors, (126670), 106 states have internal predecessors, (126670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:06,575 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 1195.0) internal successors, (126670), 106 states have internal predecessors, (126670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:06,575 INFO L175 Difference]: Start difference. First operand has 1219 places, 1068 transitions, 3214 flow. Second operand 105 states and 99332 transitions. [2022-11-20 11:44:06,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1310 places, 1128 transitions, 4122 flow [2022-11-20 11:44:06,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1237 places, 1128 transitions, 3770 flow, removed 21 selfloop flow, removed 73 redundant places. [2022-11-20 11:44:06,593 INFO L231 Difference]: Finished difference. Result has 1237 places, 1064 transitions, 3156 flow [2022-11-20 11:44:06,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1195, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=3156, PETRI_PLACES=1237, PETRI_TRANSITIONS=1064} [2022-11-20 11:44:06,593 INFO L288 CegarLoopForPetriNet]: 1056 programPoint places, 181 predicate places. [2022-11-20 11:44:06,594 INFO L495 AbstractCegarLoop]: Abstraction has has 1237 places, 1064 transitions, 3156 flow [2022-11-20 11:44:06,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 946.9461538461538) internal successors, (123103), 130 states have internal predecessors, (123103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:06,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:06,603 INFO L209 CegarLoopForPetriNet]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:06,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-11-20 11:44:06,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-11-20 11:44:06,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1964619998, now seen corresponding path program 1 times [2022-11-20 11:44:06,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:06,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3780631] [2022-11-20 11:44:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:06,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:44:06,859 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:44:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:44:06,967 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:44:06,967 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:44:06,967 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:44:06,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:44:06,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2022-11-20 11:44:06,968 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:06,968 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:44:06,968 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2022-11-20 11:44:07,064 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:44:07,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1085 places, 1228 transitions, 3821 flow [2022-11-20 11:44:08,618 INFO L130 PetriNetUnfolder]: 354/2588 cut-off events. [2022-11-20 11:44:08,618 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2022-11-20 11:44:08,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3324 conditions, 2588 events. 354/2588 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9796 event pairs, 0 based on Foata normal form. 0/2162 useless extension candidates. Maximal degree in co-relation 3186. Up to 72 conditions per place. [2022-11-20 11:44:08,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 1085 places, 1228 transitions, 3821 flow [2022-11-20 11:44:08,825 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1085 places, 1228 transitions, 3821 flow [2022-11-20 11:44:08,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:44:08,825 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:44:08,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:44:08,830 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:44:08,830 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:44:08,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:08,830 INFO L209 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] [2022-11-20 11:44:08,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash -646579162, now seen corresponding path program 1 times [2022-11-20 11:44:08,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:08,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239275566] [2022-11-20 11:44:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:08,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:08,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239275566] [2022-11-20 11:44:08,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239275566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:08,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:08,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:08,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136590794] [2022-11-20 11:44:08,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:08,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:44:08,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:08,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:44:08,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:44:08,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 978 out of 1228 [2022-11-20 11:44:08,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1085 places, 1228 transitions, 3821 flow. Second operand has 2 states, 2 states have (on average 978.5) internal successors, (1957), 2 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:08,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:08,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 978 of 1228 [2022-11-20 11:44:08,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:10,363 INFO L130 PetriNetUnfolder]: 0/2198 cut-off events. [2022-11-20 11:44:10,363 INFO L131 PetriNetUnfolder]: For 8365/8365 co-relation queries the response was YES. [2022-11-20 11:44:10,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2970 conditions, 2198 events. 0/2198 cut-off events. For 8365/8365 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9294 event pairs, 0 based on Foata normal form. 3722/5848 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-20 11:44:10,367 INFO L137 encePairwiseOnDemand]: 1014/1228 looper letters, 35 selfloop transitions, 0 changer transitions 12/1013 dead transitions. [2022-11-20 11:44:10,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 1013 transitions, 3461 flow [2022-11-20 11:44:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:44:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:44:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2205 transitions. [2022-11-20 11:44:10,369 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8978013029315961 [2022-11-20 11:44:10,369 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2205 transitions. [2022-11-20 11:44:10,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2205 transitions. [2022-11-20 11:44:10,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:10,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2205 transitions. [2022-11-20 11:44:10,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1102.5) internal successors, (2205), 2 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:10,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1228.0) internal successors, (3684), 3 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:10,372 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1228.0) internal successors, (3684), 3 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:10,372 INFO L175 Difference]: Start difference. First operand has 1085 places, 1228 transitions, 3821 flow. Second operand 2 states and 2205 transitions. [2022-11-20 11:44:10,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 1013 transitions, 3461 flow [2022-11-20 11:44:10,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1085 places, 1013 transitions, 2271 flow, removed 595 selfloop flow, removed 0 redundant places. [2022-11-20 11:44:10,389 INFO L231 Difference]: Finished difference. Result has 1085 places, 1001 transitions, 2177 flow [2022-11-20 11:44:10,389 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=1084, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1013, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2177, PETRI_PLACES=1085, PETRI_TRANSITIONS=1001} [2022-11-20 11:44:10,390 INFO L288 CegarLoopForPetriNet]: 1085 programPoint places, 0 predicate places. [2022-11-20 11:44:10,390 INFO L495 AbstractCegarLoop]: Abstraction has has 1085 places, 1001 transitions, 2177 flow [2022-11-20 11:44:10,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 978.5) internal successors, (1957), 2 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:10,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:10,390 INFO L209 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] [2022-11-20 11:44:10,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2022-11-20 11:44:10,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:10,391 INFO L85 PathProgramCache]: Analyzing trace with hash -939982169, now seen corresponding path program 1 times [2022-11-20 11:44:10,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:10,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821994648] [2022-11-20 11:44:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:10,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:10,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821994648] [2022-11-20 11:44:10,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821994648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:10,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:10,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:44:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918015953] [2022-11-20 11:44:10,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:10,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:44:10,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:44:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:44:10,426 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 971 out of 1228 [2022-11-20 11:44:10,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1085 places, 1001 transitions, 2177 flow. Second operand has 3 states, 3 states have (on average 972.0) internal successors, (2916), 3 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:10,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:10,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 971 of 1228 [2022-11-20 11:44:10,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:11,712 INFO L130 PetriNetUnfolder]: 0/1753 cut-off events. [2022-11-20 11:44:11,712 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-20 11:44:11,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 1753 events. 0/1753 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6260 event pairs, 0 based on Foata normal form. 0/1718 useless extension candidates. Maximal degree in co-relation 0. Up to 210 conditions per place. [2022-11-20 11:44:11,716 INFO L137 encePairwiseOnDemand]: 1225/1228 looper letters, 44 selfloop transitions, 2 changer transitions 0/1005 dead transitions. [2022-11-20 11:44:11,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1075 places, 1005 transitions, 2277 flow [2022-11-20 11:44:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:44:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:44:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2960 transitions. [2022-11-20 11:44:11,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8034744842562432 [2022-11-20 11:44:11,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2960 transitions. [2022-11-20 11:44:11,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2960 transitions. [2022-11-20 11:44:11,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:11,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2960 transitions. [2022-11-20 11:44:11,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 986.6666666666666) internal successors, (2960), 3 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:11,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1228.0) internal successors, (4912), 4 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:11,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1228.0) internal successors, (4912), 4 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:11,722 INFO L175 Difference]: Start difference. First operand has 1085 places, 1001 transitions, 2177 flow. Second operand 3 states and 2960 transitions. [2022-11-20 11:44:11,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1075 places, 1005 transitions, 2277 flow [2022-11-20 11:44:11,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1075 places, 1005 transitions, 2277 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:44:11,731 INFO L231 Difference]: Finished difference. Result has 1076 places, 1002 transitions, 2189 flow [2022-11-20 11:44:11,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=1073, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2189, PETRI_PLACES=1076, PETRI_TRANSITIONS=1002} [2022-11-20 11:44:11,732 INFO L288 CegarLoopForPetriNet]: 1085 programPoint places, -9 predicate places. [2022-11-20 11:44:11,732 INFO L495 AbstractCegarLoop]: Abstraction has has 1076 places, 1002 transitions, 2189 flow [2022-11-20 11:44:11,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 972.0) internal successors, (2916), 3 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:11,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:11,732 INFO L209 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] [2022-11-20 11:44:11,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2022-11-20 11:44:11,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -659830176, now seen corresponding path program 1 times [2022-11-20 11:44:11,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:11,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667852207] [2022-11-20 11:44:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:11,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:11,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:11,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667852207] [2022-11-20 11:44:11,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667852207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:11,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4279172] [2022-11-20 11:44:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:11,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:11,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:11,779 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:11,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-20 11:44:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:44:13,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:13,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:13,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4279172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:13,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:13,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:44:13,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961037636] [2022-11-20 11:44:13,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:13,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:44:13,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:44:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:44:13,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-11-20 11:44:13,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1076 places, 1002 transitions, 2189 flow. Second operand has 10 states, 10 states have (on average 972.3) internal successors, (9723), 10 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:13,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:13,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-11-20 11:44:13,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:14,730 INFO L130 PetriNetUnfolder]: 0/1727 cut-off events. [2022-11-20 11:44:14,730 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-20 11:44:14,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2189 conditions, 1727 events. 0/1727 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6126 event pairs, 0 based on Foata normal form. 2/1729 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2022-11-20 11:44:14,733 INFO L137 encePairwiseOnDemand]: 1222/1228 looper letters, 45 selfloop transitions, 9 changer transitions 0/1012 dead transitions. [2022-11-20 11:44:14,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1084 places, 1012 transitions, 2319 flow [2022-11-20 11:44:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:44:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:44:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8786 transitions. [2022-11-20 11:44:14,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7949692363373145 [2022-11-20 11:44:14,738 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8786 transitions. [2022-11-20 11:44:14,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8786 transitions. [2022-11-20 11:44:14,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:14,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8786 transitions. [2022-11-20 11:44:14,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 976.2222222222222) internal successors, (8786), 9 states have internal predecessors, (8786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:14,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1228.0) internal successors, (12280), 10 states have internal predecessors, (12280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:14,751 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1228.0) internal successors, (12280), 10 states have internal predecessors, (12280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:14,751 INFO L175 Difference]: Start difference. First operand has 1076 places, 1002 transitions, 2189 flow. Second operand 9 states and 8786 transitions. [2022-11-20 11:44:14,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1084 places, 1012 transitions, 2319 flow [2022-11-20 11:44:14,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 1012 transitions, 2317 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:44:14,759 INFO L231 Difference]: Finished difference. Result has 1086 places, 1008 transitions, 2237 flow [2022-11-20 11:44:14,760 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=996, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2237, PETRI_PLACES=1086, PETRI_TRANSITIONS=1008} [2022-11-20 11:44:14,760 INFO L288 CegarLoopForPetriNet]: 1085 programPoint places, 1 predicate places. [2022-11-20 11:44:14,760 INFO L495 AbstractCegarLoop]: Abstraction has has 1086 places, 1008 transitions, 2237 flow [2022-11-20 11:44:14,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 972.3) internal successors, (9723), 10 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:14,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:14,761 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:14,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:14,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:14,962 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash 483285013, now seen corresponding path program 1 times [2022-11-20 11:44:14,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:14,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819229120] [2022-11-20 11:44:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:14,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:15,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:15,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819229120] [2022-11-20 11:44:15,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819229120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:15,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979778413] [2022-11-20 11:44:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:15,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:15,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:15,066 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:15,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-20 11:44:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:16,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:44:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:16,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:16,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979778413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:16,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:16,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:44:16,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108228723] [2022-11-20 11:44:16,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:44:16,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:16,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:44:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:44:16,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-11-20 11:44:16,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1086 places, 1008 transitions, 2237 flow. Second operand has 18 states, 18 states have (on average 972.6111111111111) internal successors, (17507), 18 states have internal predecessors, (17507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:16,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:16,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-11-20 11:44:16,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:18,246 INFO L130 PetriNetUnfolder]: 0/1675 cut-off events. [2022-11-20 11:44:18,246 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-11-20 11:44:18,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2398 conditions, 1675 events. 0/1675 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5778 event pairs, 0 based on Foata normal form. 4/1679 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-11-20 11:44:18,250 INFO L137 encePairwiseOnDemand]: 1222/1228 looper letters, 53 selfloop transitions, 21 changer transitions 0/1032 dead transitions. [2022-11-20 11:44:18,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1106 places, 1032 transitions, 2493 flow [2022-11-20 11:44:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:44:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:44:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20448 transitions. [2022-11-20 11:44:18,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7929269427640763 [2022-11-20 11:44:18,261 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20448 transitions. [2022-11-20 11:44:18,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20448 transitions. [2022-11-20 11:44:18,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:18,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20448 transitions. [2022-11-20 11:44:18,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 973.7142857142857) internal successors, (20448), 21 states have internal predecessors, (20448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:18,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1228.0) internal successors, (27016), 22 states have internal predecessors, (27016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:18,290 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1228.0) internal successors, (27016), 22 states have internal predecessors, (27016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:18,290 INFO L175 Difference]: Start difference. First operand has 1086 places, 1008 transitions, 2237 flow. Second operand 21 states and 20448 transitions. [2022-11-20 11:44:18,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1106 places, 1032 transitions, 2493 flow [2022-11-20 11:44:18,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1105 places, 1032 transitions, 2479 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:44:18,302 INFO L231 Difference]: Finished difference. Result has 1110 places, 1021 transitions, 2361 flow [2022-11-20 11:44:18,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=1085, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2361, PETRI_PLACES=1110, PETRI_TRANSITIONS=1021} [2022-11-20 11:44:18,302 INFO L288 CegarLoopForPetriNet]: 1085 programPoint places, 25 predicate places. [2022-11-20 11:44:18,303 INFO L495 AbstractCegarLoop]: Abstraction has has 1110 places, 1021 transitions, 2361 flow [2022-11-20 11:44:18,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 972.6111111111111) internal successors, (17507), 18 states have internal predecessors, (17507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:18,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:18,306 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:18,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:18,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:18,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash 794569099, now seen corresponding path program 1 times [2022-11-20 11:44:18,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:18,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142100448] [2022-11-20 11:44:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:18,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:18,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142100448] [2022-11-20 11:44:18,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142100448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800272567] [2022-11-20 11:44:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:18,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:18,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:18,719 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:18,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-20 11:44:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:20,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:44:20,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:20,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:20,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800272567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:20,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:20,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:44:20,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2287598] [2022-11-20 11:44:20,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:20,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:44:20,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:20,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:44:20,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:44:20,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-11-20 11:44:20,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1110 places, 1021 transitions, 2361 flow. Second operand has 34 states, 34 states have (on average 972.7941176470588) internal successors, (33075), 34 states have internal predecessors, (33075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:20,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:20,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-11-20 11:44:20,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:22,336 INFO L130 PetriNetUnfolder]: 0/1571 cut-off events. [2022-11-20 11:44:22,336 INFO L131 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2022-11-20 11:44:22,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 1571 events. 0/1571 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5086 event pairs, 0 based on Foata normal form. 8/1579 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-11-20 11:44:22,339 INFO L137 encePairwiseOnDemand]: 1222/1228 looper letters, 69 selfloop transitions, 45 changer transitions 0/1072 dead transitions. [2022-11-20 11:44:22,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1154 places, 1072 transitions, 2905 flow [2022-11-20 11:44:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:44:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:44:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 43772 transitions. [2022-11-20 11:44:22,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.792110025334781 [2022-11-20 11:44:22,360 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 43772 transitions. [2022-11-20 11:44:22,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 43772 transitions. [2022-11-20 11:44:22,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:22,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 43772 transitions. [2022-11-20 11:44:22,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 972.7111111111111) internal successors, (43772), 45 states have internal predecessors, (43772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:22,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1228.0) internal successors, (56488), 46 states have internal predecessors, (56488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:22,419 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1228.0) internal successors, (56488), 46 states have internal predecessors, (56488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:22,419 INFO L175 Difference]: Start difference. First operand has 1110 places, 1021 transitions, 2361 flow. Second operand 45 states and 43772 transitions. [2022-11-20 11:44:22,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1154 places, 1072 transitions, 2905 flow [2022-11-20 11:44:22,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1148 places, 1072 transitions, 2865 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:44:22,433 INFO L231 Difference]: Finished difference. Result has 1157 places, 1046 transitions, 2639 flow [2022-11-20 11:44:22,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=998, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2639, PETRI_PLACES=1157, PETRI_TRANSITIONS=1046} [2022-11-20 11:44:22,433 INFO L288 CegarLoopForPetriNet]: 1085 programPoint places, 72 predicate places. [2022-11-20 11:44:22,433 INFO L495 AbstractCegarLoop]: Abstraction has has 1157 places, 1046 transitions, 2639 flow [2022-11-20 11:44:22,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 972.7941176470588) internal successors, (33075), 34 states have internal predecessors, (33075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:22,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:22,436 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:22,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-11-20 11:44:22,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-11-20 11:44:22,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:22,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1116802215, now seen corresponding path program 1 times [2022-11-20 11:44:22,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:22,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162943644] [2022-11-20 11:44:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:22,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:23,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162943644] [2022-11-20 11:44:23,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162943644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698643714] [2022-11-20 11:44:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:23,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:23,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:23,374 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:23,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-11-20 11:44:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:44:24,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:24,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:25,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698643714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:25,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:25,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:44:25,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597792291] [2022-11-20 11:44:25,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:25,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:44:25,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:25,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:44:25,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:44:25,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-11-20 11:44:25,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1157 places, 1046 transitions, 2639 flow. Second operand has 66 states, 66 states have (on average 972.8939393939394) internal successors, (64211), 66 states have internal predecessors, (64211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:25,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:25,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-11-20 11:44:25,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:29,245 INFO L130 PetriNetUnfolder]: 0/1363 cut-off events. [2022-11-20 11:44:29,245 INFO L131 PetriNetUnfolder]: For 2708/2708 co-relation queries the response was YES. [2022-11-20 11:44:29,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1363 events. 0/1363 cut-off events. For 2708/2708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3723 event pairs, 0 based on Foata normal form. 16/1379 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-20 11:44:29,247 INFO L137 encePairwiseOnDemand]: 1222/1228 looper letters, 101 selfloop transitions, 93 changer transitions 0/1152 dead transitions. [2022-11-20 11:44:29,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 1152 transitions, 3875 flow [2022-11-20 11:44:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:44:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:44:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 90420 transitions. [2022-11-20 11:44:29,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7917410948828413 [2022-11-20 11:44:29,284 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 90420 transitions. [2022-11-20 11:44:29,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 90420 transitions. [2022-11-20 11:44:29,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:29,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 90420 transitions. [2022-11-20 11:44:29,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 972.258064516129) internal successors, (90420), 93 states have internal predecessors, (90420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:29,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1228.0) internal successors, (115432), 94 states have internal predecessors, (115432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:29,412 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1228.0) internal successors, (115432), 94 states have internal predecessors, (115432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:29,412 INFO L175 Difference]: Start difference. First operand has 1157 places, 1046 transitions, 2639 flow. Second operand 93 states and 90420 transitions. [2022-11-20 11:44:29,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1249 places, 1152 transitions, 3875 flow [2022-11-20 11:44:29,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1231 places, 1152 transitions, 3787 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:44:29,436 INFO L231 Difference]: Finished difference. Result has 1248 places, 1095 transitions, 3273 flow [2022-11-20 11:44:29,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=1139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3273, PETRI_PLACES=1248, PETRI_TRANSITIONS=1095} [2022-11-20 11:44:29,437 INFO L288 CegarLoopForPetriNet]: 1085 programPoint places, 163 predicate places. [2022-11-20 11:44:29,438 INFO L495 AbstractCegarLoop]: Abstraction has has 1248 places, 1095 transitions, 3273 flow [2022-11-20 11:44:29,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 972.8939393939394) internal successors, (64211), 66 states have internal predecessors, (64211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:29,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:29,445 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:29,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:29,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:29,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1343951775, now seen corresponding path program 1 times [2022-11-20 11:44:29,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:29,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928050674] [2022-11-20 11:44:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:29,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:32,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:32,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928050674] [2022-11-20 11:44:32,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928050674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:32,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629445335] [2022-11-20 11:44:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:32,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:32,011 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:32,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-20 11:44:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:44:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:33,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:37,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629445335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:37,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:37,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:44:37,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292460759] [2022-11-20 11:44:37,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:37,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:44:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:37,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:44:37,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:44:37,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 970 out of 1228 [2022-11-20 11:44:37,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1248 places, 1095 transitions, 3273 flow. Second operand has 130 states, 130 states have (on average 972.9461538461538) internal successors, (126483), 130 states have internal predecessors, (126483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:37,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:37,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 970 of 1228 [2022-11-20 11:44:37,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:42,111 INFO L130 PetriNetUnfolder]: 0/1298 cut-off events. [2022-11-20 11:44:42,111 INFO L131 PetriNetUnfolder]: For 3183/3183 co-relation queries the response was YES. [2022-11-20 11:44:42,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2352 conditions, 1298 events. 0/1298 cut-off events. For 3183/3183 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3325 event pairs, 0 based on Foata normal form. 5/1303 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-20 11:44:42,113 INFO L137 encePairwiseOnDemand]: 1223/1228 looper letters, 108 selfloop transitions, 106 changer transitions 0/1160 dead transitions. [2022-11-20 11:44:42,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1342 places, 1160 transitions, 4247 flow [2022-11-20 11:44:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-11-20 11:44:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-11-20 11:44:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 104979 transitions. [2022-11-20 11:44:42,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7915535649656171 [2022-11-20 11:44:42,154 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 104979 transitions. [2022-11-20 11:44:42,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 104979 transitions. [2022-11-20 11:44:42,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:42,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 104979 transitions. [2022-11-20 11:44:42,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 972.0277777777778) internal successors, (104979), 108 states have internal predecessors, (104979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:42,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 1228.0) internal successors, (133852), 109 states have internal predecessors, (133852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:42,299 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 1228.0) internal successors, (133852), 109 states have internal predecessors, (133852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:42,299 INFO L175 Difference]: Start difference. First operand has 1248 places, 1095 transitions, 3273 flow. Second operand 108 states and 104979 transitions. [2022-11-20 11:44:42,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1342 places, 1160 transitions, 4247 flow [2022-11-20 11:44:42,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1269 places, 1160 transitions, 3885 flow, removed 22 selfloop flow, removed 73 redundant places. [2022-11-20 11:44:42,317 INFO L231 Difference]: Finished difference. Result has 1269 places, 1094 transitions, 3249 flow [2022-11-20 11:44:42,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1228, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=3249, PETRI_PLACES=1269, PETRI_TRANSITIONS=1094} [2022-11-20 11:44:42,318 INFO L288 CegarLoopForPetriNet]: 1085 programPoint places, 184 predicate places. [2022-11-20 11:44:42,318 INFO L495 AbstractCegarLoop]: Abstraction has has 1269 places, 1094 transitions, 3249 flow [2022-11-20 11:44:42,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 972.9461538461538) internal successors, (126483), 130 states have internal predecessors, (126483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:42,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:42,327 INFO L209 CegarLoopForPetriNet]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:42,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-11-20 11:44:42,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-11-20 11:44:42,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:42,528 INFO L85 PathProgramCache]: Analyzing trace with hash 355069785, now seen corresponding path program 1 times [2022-11-20 11:44:42,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:42,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781114334] [2022-11-20 11:44:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:42,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:44:42,585 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:44:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:44:42,723 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:44:42,724 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:44:42,724 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:44:42,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:44:42,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2022-11-20 11:44:42,724 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:42,725 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:44:42,725 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2022-11-20 11:44:42,825 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:44:42,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1114 places, 1261 transitions, 3962 flow [2022-11-20 11:44:44,994 INFO L130 PetriNetUnfolder]: 364/2660 cut-off events. [2022-11-20 11:44:44,994 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2022-11-20 11:44:45,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3435 conditions, 2660 events. 364/2660 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 10184 event pairs, 0 based on Foata normal form. 0/2222 useless extension candidates. Maximal degree in co-relation 3296. Up to 74 conditions per place. [2022-11-20 11:44:45,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 1114 places, 1261 transitions, 3962 flow [2022-11-20 11:44:45,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1114 places, 1261 transitions, 3962 flow [2022-11-20 11:44:45,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:44:45,173 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:44:45,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:44:45,177 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:44:45,177 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:44:45,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:45,177 INFO L209 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] [2022-11-20 11:44:45,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash -980623994, now seen corresponding path program 1 times [2022-11-20 11:44:45,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:45,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433250940] [2022-11-20 11:44:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:45,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:45,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:45,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433250940] [2022-11-20 11:44:45,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433250940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:45,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:45,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18864871] [2022-11-20 11:44:45,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:45,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:44:45,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:44:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:44:45,205 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1004 out of 1261 [2022-11-20 11:44:45,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1114 places, 1261 transitions, 3962 flow. Second operand has 2 states, 2 states have (on average 1004.5) internal successors, (2009), 2 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:45,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:45,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1004 of 1261 [2022-11-20 11:44:45,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:47,008 INFO L130 PetriNetUnfolder]: 0/2259 cut-off events. [2022-11-20 11:44:47,008 INFO L131 PetriNetUnfolder]: For 9066/9066 co-relation queries the response was YES. [2022-11-20 11:44:47,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3071 conditions, 2259 events. 0/2259 cut-off events. For 9066/9066 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9561 event pairs, 0 based on Foata normal form. 3936/6121 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-11-20 11:44:47,012 INFO L137 encePairwiseOnDemand]: 1041/1261 looper letters, 36 selfloop transitions, 0 changer transitions 12/1040 dead transitions. [2022-11-20 11:44:47,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1114 places, 1040 transitions, 3592 flow [2022-11-20 11:44:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:44:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:44:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2264 transitions. [2022-11-20 11:44:47,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8977002379064235 [2022-11-20 11:44:47,015 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2264 transitions. [2022-11-20 11:44:47,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2264 transitions. [2022-11-20 11:44:47,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:47,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2264 transitions. [2022-11-20 11:44:47,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1132.0) internal successors, (2264), 2 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:47,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1261.0) internal successors, (3783), 3 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:47,020 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1261.0) internal successors, (3783), 3 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:47,021 INFO L175 Difference]: Start difference. First operand has 1114 places, 1261 transitions, 3962 flow. Second operand 2 states and 2264 transitions. [2022-11-20 11:44:47,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1114 places, 1040 transitions, 3592 flow [2022-11-20 11:44:47,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1114 places, 1040 transitions, 2332 flow, removed 630 selfloop flow, removed 0 redundant places. [2022-11-20 11:44:47,052 INFO L231 Difference]: Finished difference. Result has 1114 places, 1028 transitions, 2236 flow [2022-11-20 11:44:47,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1261, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=1113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1040, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2236, PETRI_PLACES=1114, PETRI_TRANSITIONS=1028} [2022-11-20 11:44:47,053 INFO L288 CegarLoopForPetriNet]: 1114 programPoint places, 0 predicate places. [2022-11-20 11:44:47,053 INFO L495 AbstractCegarLoop]: Abstraction has has 1114 places, 1028 transitions, 2236 flow [2022-11-20 11:44:47,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1004.5) internal successors, (2009), 2 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:47,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:47,054 INFO L209 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] [2022-11-20 11:44:47,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2022-11-20 11:44:47,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1274027001, now seen corresponding path program 1 times [2022-11-20 11:44:47,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:47,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881842571] [2022-11-20 11:44:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:47,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:47,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:47,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881842571] [2022-11-20 11:44:47,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881842571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:47,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:47,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:44:47,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569445846] [2022-11-20 11:44:47,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:47,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:44:47,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:44:47,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:44:47,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 997 out of 1261 [2022-11-20 11:44:47,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1114 places, 1028 transitions, 2236 flow. Second operand has 3 states, 3 states have (on average 998.0) internal successors, (2994), 3 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:47,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:47,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 997 of 1261 [2022-11-20 11:44:47,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:48,624 INFO L130 PetriNetUnfolder]: 0/1802 cut-off events. [2022-11-20 11:44:48,624 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-20 11:44:48,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 1802 events. 0/1802 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6442 event pairs, 0 based on Foata normal form. 0/1766 useless extension candidates. Maximal degree in co-relation 0. Up to 216 conditions per place. [2022-11-20 11:44:48,627 INFO L137 encePairwiseOnDemand]: 1258/1261 looper letters, 45 selfloop transitions, 2 changer transitions 0/1032 dead transitions. [2022-11-20 11:44:48,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1104 places, 1032 transitions, 2338 flow [2022-11-20 11:44:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:44:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:44:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3039 transitions. [2022-11-20 11:44:48,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8033306899286281 [2022-11-20 11:44:48,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3039 transitions. [2022-11-20 11:44:48,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3039 transitions. [2022-11-20 11:44:48,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:48,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3039 transitions. [2022-11-20 11:44:48,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1013.0) internal successors, (3039), 3 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:48,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1261.0) internal successors, (5044), 4 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:48,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1261.0) internal successors, (5044), 4 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:48,635 INFO L175 Difference]: Start difference. First operand has 1114 places, 1028 transitions, 2236 flow. Second operand 3 states and 3039 transitions. [2022-11-20 11:44:48,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1104 places, 1032 transitions, 2338 flow [2022-11-20 11:44:48,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1104 places, 1032 transitions, 2338 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:44:48,643 INFO L231 Difference]: Finished difference. Result has 1105 places, 1029 transitions, 2248 flow [2022-11-20 11:44:48,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1261, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=1102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1026, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2248, PETRI_PLACES=1105, PETRI_TRANSITIONS=1029} [2022-11-20 11:44:48,643 INFO L288 CegarLoopForPetriNet]: 1114 programPoint places, -9 predicate places. [2022-11-20 11:44:48,644 INFO L495 AbstractCegarLoop]: Abstraction has has 1105 places, 1029 transitions, 2248 flow [2022-11-20 11:44:48,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 998.0) internal successors, (2994), 3 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:48,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:48,644 INFO L209 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] [2022-11-20 11:44:48,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2022-11-20 11:44:48,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:48,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1107996672, now seen corresponding path program 1 times [2022-11-20 11:44:48,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:48,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434882021] [2022-11-20 11:44:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:48,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:48,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434882021] [2022-11-20 11:44:48,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434882021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:48,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736387145] [2022-11-20 11:44:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:48,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:48,691 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:48,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-20 11:44:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:50,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:44:50,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:50,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:50,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736387145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:50,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:50,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:44:50,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424906167] [2022-11-20 11:44:50,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:50,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:44:50,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:44:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:44:50,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 996 out of 1261 [2022-11-20 11:44:50,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1105 places, 1029 transitions, 2248 flow. Second operand has 10 states, 10 states have (on average 998.3) internal successors, (9983), 10 states have internal predecessors, (9983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:50,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:50,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 996 of 1261 [2022-11-20 11:44:50,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:51,691 INFO L130 PetriNetUnfolder]: 0/1776 cut-off events. [2022-11-20 11:44:51,691 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-20 11:44:51,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 1776 events. 0/1776 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6291 event pairs, 0 based on Foata normal form. 2/1778 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2022-11-20 11:44:51,695 INFO L137 encePairwiseOnDemand]: 1255/1261 looper letters, 46 selfloop transitions, 9 changer transitions 0/1039 dead transitions. [2022-11-20 11:44:51,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1113 places, 1039 transitions, 2380 flow [2022-11-20 11:44:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:44:51,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:44:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9021 transitions. [2022-11-20 11:44:51,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2022-11-20 11:44:51,700 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9021 transitions. [2022-11-20 11:44:51,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9021 transitions. [2022-11-20 11:44:51,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:51,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9021 transitions. [2022-11-20 11:44:51,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1002.3333333333334) internal successors, (9021), 9 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:51,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1261.0) internal successors, (12610), 10 states have internal predecessors, (12610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:51,712 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1261.0) internal successors, (12610), 10 states have internal predecessors, (12610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:51,712 INFO L175 Difference]: Start difference. First operand has 1105 places, 1029 transitions, 2248 flow. Second operand 9 states and 9021 transitions. [2022-11-20 11:44:51,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1113 places, 1039 transitions, 2380 flow [2022-11-20 11:44:51,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1112 places, 1039 transitions, 2378 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:44:51,722 INFO L231 Difference]: Finished difference. Result has 1115 places, 1035 transitions, 2296 flow [2022-11-20 11:44:51,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1261, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1023, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2296, PETRI_PLACES=1115, PETRI_TRANSITIONS=1035} [2022-11-20 11:44:51,723 INFO L288 CegarLoopForPetriNet]: 1114 programPoint places, 1 predicate places. [2022-11-20 11:44:51,723 INFO L495 AbstractCegarLoop]: Abstraction has has 1115 places, 1035 transitions, 2296 flow [2022-11-20 11:44:51,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 998.3) internal successors, (9983), 10 states have internal predecessors, (9983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:51,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:51,724 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:51,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:51,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-11-20 11:44:51,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1757959733, now seen corresponding path program 1 times [2022-11-20 11:44:51,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:51,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326830247] [2022-11-20 11:44:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:51,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:52,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:52,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326830247] [2022-11-20 11:44:52,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326830247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:52,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991662191] [2022-11-20 11:44:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:52,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:52,007 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:52,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-11-20 11:44:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:44:53,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:53,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:53,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991662191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:53,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:53,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:44:53,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675465518] [2022-11-20 11:44:53,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:53,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:44:53,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:53,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:44:53,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:44:53,571 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 996 out of 1261 [2022-11-20 11:44:53,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1115 places, 1035 transitions, 2296 flow. Second operand has 18 states, 18 states have (on average 998.6111111111111) internal successors, (17975), 18 states have internal predecessors, (17975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:53,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:53,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 996 of 1261 [2022-11-20 11:44:53,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:55,182 INFO L130 PetriNetUnfolder]: 0/1724 cut-off events. [2022-11-20 11:44:55,182 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-20 11:44:55,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2468 conditions, 1724 events. 0/1724 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5953 event pairs, 0 based on Foata normal form. 4/1728 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-11-20 11:44:55,185 INFO L137 encePairwiseOnDemand]: 1255/1261 looper letters, 54 selfloop transitions, 21 changer transitions 0/1059 dead transitions. [2022-11-20 11:44:55,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1135 places, 1059 transitions, 2554 flow [2022-11-20 11:44:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:44:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:44:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20995 transitions. [2022-11-20 11:44:55,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7928325969563083 [2022-11-20 11:44:55,196 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20995 transitions. [2022-11-20 11:44:55,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20995 transitions. [2022-11-20 11:44:55,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:55,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20995 transitions. [2022-11-20 11:44:55,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 999.7619047619048) internal successors, (20995), 21 states have internal predecessors, (20995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:55,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1261.0) internal successors, (27742), 22 states have internal predecessors, (27742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:55,225 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1261.0) internal successors, (27742), 22 states have internal predecessors, (27742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:55,225 INFO L175 Difference]: Start difference. First operand has 1115 places, 1035 transitions, 2296 flow. Second operand 21 states and 20995 transitions. [2022-11-20 11:44:55,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1135 places, 1059 transitions, 2554 flow [2022-11-20 11:44:55,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1134 places, 1059 transitions, 2540 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:44:55,235 INFO L231 Difference]: Finished difference. Result has 1139 places, 1048 transitions, 2420 flow [2022-11-20 11:44:55,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1261, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=1114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2420, PETRI_PLACES=1139, PETRI_TRANSITIONS=1048} [2022-11-20 11:44:55,236 INFO L288 CegarLoopForPetriNet]: 1114 programPoint places, 25 predicate places. [2022-11-20 11:44:55,236 INFO L495 AbstractCegarLoop]: Abstraction has has 1139 places, 1048 transitions, 2420 flow [2022-11-20 11:44:55,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 998.6111111111111) internal successors, (17975), 18 states have internal predecessors, (17975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:55,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:55,238 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:55,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:55,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:55,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:55,439 INFO L85 PathProgramCache]: Analyzing trace with hash -441935701, now seen corresponding path program 1 times [2022-11-20 11:44:55,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:55,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444235677] [2022-11-20 11:44:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:55,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:55,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:55,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444235677] [2022-11-20 11:44:55,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444235677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:55,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852762563] [2022-11-20 11:44:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:55,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:55,638 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:55,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-11-20 11:44:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:44:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:57,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:57,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852762563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:57,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:57,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:44:57,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263375949] [2022-11-20 11:44:57,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:57,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:44:57,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:57,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:44:57,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:44:57,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 996 out of 1261 [2022-11-20 11:44:57,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1139 places, 1048 transitions, 2420 flow. Second operand has 34 states, 34 states have (on average 998.7941176470588) internal successors, (33959), 34 states have internal predecessors, (33959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:57,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:57,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 996 of 1261 [2022-11-20 11:44:57,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:44:59,632 INFO L130 PetriNetUnfolder]: 0/1620 cut-off events. [2022-11-20 11:44:59,632 INFO L131 PetriNetUnfolder]: For 843/843 co-relation queries the response was YES. [2022-11-20 11:44:59,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 1620 events. 0/1620 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5282 event pairs, 0 based on Foata normal form. 8/1628 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-11-20 11:44:59,636 INFO L137 encePairwiseOnDemand]: 1255/1261 looper letters, 70 selfloop transitions, 45 changer transitions 0/1099 dead transitions. [2022-11-20 11:44:59,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1183 places, 1099 transitions, 2966 flow [2022-11-20 11:44:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:44:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:44:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 44943 transitions. [2022-11-20 11:44:59,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7920169177901136 [2022-11-20 11:44:59,656 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 44943 transitions. [2022-11-20 11:44:59,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 44943 transitions. [2022-11-20 11:44:59,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:44:59,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 44943 transitions. [2022-11-20 11:44:59,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 998.7333333333333) internal successors, (44943), 45 states have internal predecessors, (44943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:59,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1261.0) internal successors, (58006), 46 states have internal predecessors, (58006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:59,719 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1261.0) internal successors, (58006), 46 states have internal predecessors, (58006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:59,719 INFO L175 Difference]: Start difference. First operand has 1139 places, 1048 transitions, 2420 flow. Second operand 45 states and 44943 transitions. [2022-11-20 11:44:59,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1183 places, 1099 transitions, 2966 flow [2022-11-20 11:44:59,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1177 places, 1099 transitions, 2926 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:44:59,734 INFO L231 Difference]: Finished difference. Result has 1186 places, 1073 transitions, 2698 flow [2022-11-20 11:44:59,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1261, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1025, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2698, PETRI_PLACES=1186, PETRI_TRANSITIONS=1073} [2022-11-20 11:44:59,735 INFO L288 CegarLoopForPetriNet]: 1114 programPoint places, 72 predicate places. [2022-11-20 11:44:59,735 INFO L495 AbstractCegarLoop]: Abstraction has has 1186 places, 1073 transitions, 2698 flow [2022-11-20 11:44:59,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 998.7941176470588) internal successors, (33959), 34 states have internal predecessors, (33959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:59,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:59,739 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:59,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:59,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:59,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:44:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1634950599, now seen corresponding path program 1 times [2022-11-20 11:44:59,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:59,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143509682] [2022-11-20 11:44:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:59,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:00,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:00,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143509682] [2022-11-20 11:45:00,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143509682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:00,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774278729] [2022-11-20 11:45:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:00,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:00,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:00,573 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:00,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-20 11:45:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:02,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:45:02,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:02,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:03,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774278729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:03,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:03,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:45:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242647456] [2022-11-20 11:45:03,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:45:03,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:45:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:45:03,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 996 out of 1261 [2022-11-20 11:45:03,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1186 places, 1073 transitions, 2698 flow. Second operand has 66 states, 66 states have (on average 998.8939393939394) internal successors, (65927), 66 states have internal predecessors, (65927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:03,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:03,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 996 of 1261 [2022-11-20 11:45:03,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:06,757 INFO L130 PetriNetUnfolder]: 0/1412 cut-off events. [2022-11-20 11:45:06,757 INFO L131 PetriNetUnfolder]: For 2829/2829 co-relation queries the response was YES. [2022-11-20 11:45:06,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2467 conditions, 1412 events. 0/1412 cut-off events. For 2829/2829 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3908 event pairs, 0 based on Foata normal form. 16/1428 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2022-11-20 11:45:06,759 INFO L137 encePairwiseOnDemand]: 1255/1261 looper letters, 102 selfloop transitions, 93 changer transitions 0/1179 dead transitions. [2022-11-20 11:45:06,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1278 places, 1179 transitions, 3936 flow [2022-11-20 11:45:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:45:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:45:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 92839 transitions. [2022-11-20 11:45:06,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916485465537677 [2022-11-20 11:45:06,797 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 92839 transitions. [2022-11-20 11:45:06,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 92839 transitions. [2022-11-20 11:45:06,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:06,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 92839 transitions. [2022-11-20 11:45:06,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 998.2688172043011) internal successors, (92839), 93 states have internal predecessors, (92839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:06,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1261.0) internal successors, (118534), 94 states have internal predecessors, (118534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:06,925 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1261.0) internal successors, (118534), 94 states have internal predecessors, (118534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:06,925 INFO L175 Difference]: Start difference. First operand has 1186 places, 1073 transitions, 2698 flow. Second operand 93 states and 92839 transitions. [2022-11-20 11:45:06,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1278 places, 1179 transitions, 3936 flow [2022-11-20 11:45:06,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1260 places, 1179 transitions, 3848 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:45:06,947 INFO L231 Difference]: Finished difference. Result has 1277 places, 1122 transitions, 3332 flow [2022-11-20 11:45:06,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1261, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=1168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1026, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3332, PETRI_PLACES=1277, PETRI_TRANSITIONS=1122} [2022-11-20 11:45:06,948 INFO L288 CegarLoopForPetriNet]: 1114 programPoint places, 163 predicate places. [2022-11-20 11:45:06,948 INFO L495 AbstractCegarLoop]: Abstraction has has 1277 places, 1122 transitions, 3332 flow [2022-11-20 11:45:06,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 998.8939393939394) internal successors, (65927), 66 states have internal predecessors, (65927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:06,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:06,956 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:06,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-11-20 11:45:07,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash 200091839, now seen corresponding path program 1 times [2022-11-20 11:45:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:07,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902964757] [2022-11-20 11:45:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:09,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:09,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902964757] [2022-11-20 11:45:09,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902964757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:09,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009173087] [2022-11-20 11:45:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:09,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:09,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:09,413 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:09,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-20 11:45:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:45:10,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:11,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:14,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009173087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:14,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:14,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:45:14,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134391173] [2022-11-20 11:45:14,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:45:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:14,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:45:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:45:14,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 996 out of 1261 [2022-11-20 11:45:15,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1277 places, 1122 transitions, 3332 flow. Second operand has 130 states, 130 states have (on average 998.9461538461538) internal successors, (129863), 130 states have internal predecessors, (129863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:15,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:15,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 996 of 1261 [2022-11-20 11:45:15,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:19,908 INFO L130 PetriNetUnfolder]: 0/1334 cut-off events. [2022-11-20 11:45:19,909 INFO L131 PetriNetUnfolder]: For 3680/3680 co-relation queries the response was YES. [2022-11-20 11:45:19,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 1334 events. 0/1334 cut-off events. For 3680/3680 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3423 event pairs, 0 based on Foata normal form. 6/1340 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2022-11-20 11:45:19,911 INFO L137 encePairwiseOnDemand]: 1256/1261 looper letters, 111 selfloop transitions, 109 changer transitions 0/1192 dead transitions. [2022-11-20 11:45:19,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1374 places, 1192 transitions, 4372 flow [2022-11-20 11:45:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-20 11:45:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-11-20 11:45:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 110782 transitions. [2022-11-20 11:45:19,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914639461031213 [2022-11-20 11:45:19,956 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 110782 transitions. [2022-11-20 11:45:19,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 110782 transitions. [2022-11-20 11:45:19,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:19,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 110782 transitions. [2022-11-20 11:45:20,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 998.0360360360361) internal successors, (110782), 111 states have internal predecessors, (110782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:20,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 1261.0) internal successors, (141232), 112 states have internal predecessors, (141232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:20,130 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 1261.0) internal successors, (141232), 112 states have internal predecessors, (141232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:20,130 INFO L175 Difference]: Start difference. First operand has 1277 places, 1122 transitions, 3332 flow. Second operand 111 states and 110782 transitions. [2022-11-20 11:45:20,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1374 places, 1192 transitions, 4372 flow [2022-11-20 11:45:20,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1301 places, 1192 transitions, 4000 flow, removed 23 selfloop flow, removed 73 redundant places. [2022-11-20 11:45:20,153 INFO L231 Difference]: Finished difference. Result has 1301 places, 1124 transitions, 3342 flow [2022-11-20 11:45:20,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1261, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=1191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=3342, PETRI_PLACES=1301, PETRI_TRANSITIONS=1124} [2022-11-20 11:45:20,154 INFO L288 CegarLoopForPetriNet]: 1114 programPoint places, 187 predicate places. [2022-11-20 11:45:20,154 INFO L495 AbstractCegarLoop]: Abstraction has has 1301 places, 1124 transitions, 3342 flow [2022-11-20 11:45:20,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 998.9461538461538) internal successors, (129863), 130 states have internal predecessors, (129863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:20,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:20,166 INFO L209 CegarLoopForPetriNet]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:20,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-11-20 11:45:20,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:20,366 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:20,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1848076021, now seen corresponding path program 1 times [2022-11-20 11:45:20,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:20,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77465184] [2022-11-20 11:45:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:20,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:45:20,448 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:45:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:45:20,592 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:45:20,592 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:45:20,592 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:45:20,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:45:20,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2022-11-20 11:45:20,593 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:20,593 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:45:20,593 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2022-11-20 11:45:20,691 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:45:20,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1143 places, 1294 transitions, 4105 flow [2022-11-20 11:45:23,090 INFO L130 PetriNetUnfolder]: 374/2732 cut-off events. [2022-11-20 11:45:23,090 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2022-11-20 11:45:23,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 2732 events. 374/2732 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 10327 event pairs, 0 based on Foata normal form. 0/2282 useless extension candidates. Maximal degree in co-relation 3407. Up to 76 conditions per place. [2022-11-20 11:45:23,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 1143 places, 1294 transitions, 4105 flow [2022-11-20 11:45:23,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1143 places, 1294 transitions, 4105 flow [2022-11-20 11:45:23,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:45:23,549 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:45:23,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:45:23,554 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:45:23,554 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:45:23,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:23,554 INFO L209 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] [2022-11-20 11:45:23,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:23,555 INFO L85 PathProgramCache]: Analyzing trace with hash 423867846, now seen corresponding path program 1 times [2022-11-20 11:45:23,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:23,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360584856] [2022-11-20 11:45:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:23,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:23,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360584856] [2022-11-20 11:45:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360584856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:23,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:23,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:45:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325129972] [2022-11-20 11:45:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:23,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:45:23,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:45:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:45:23,585 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1030 out of 1294 [2022-11-20 11:45:23,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1143 places, 1294 transitions, 4105 flow. Second operand has 2 states, 2 states have (on average 1030.5) internal successors, (2061), 2 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:23,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:23,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1030 of 1294 [2022-11-20 11:45:23,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:25,606 INFO L130 PetriNetUnfolder]: 0/2320 cut-off events. [2022-11-20 11:45:25,606 INFO L131 PetriNetUnfolder]: For 9805/9805 co-relation queries the response was YES. [2022-11-20 11:45:25,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3173 conditions, 2320 events. 0/2320 cut-off events. For 9805/9805 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9834 event pairs, 0 based on Foata normal form. 4156/6400 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-11-20 11:45:25,611 INFO L137 encePairwiseOnDemand]: 1068/1294 looper letters, 37 selfloop transitions, 0 changer transitions 12/1067 dead transitions. [2022-11-20 11:45:25,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1143 places, 1067 transitions, 3725 flow [2022-11-20 11:45:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:45:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:45:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2323 transitions. [2022-11-20 11:45:25,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8976043276661515 [2022-11-20 11:45:25,613 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2323 transitions. [2022-11-20 11:45:25,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2323 transitions. [2022-11-20 11:45:25,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:25,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2323 transitions. [2022-11-20 11:45:25,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1161.5) internal successors, (2323), 2 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:25,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1294.0) internal successors, (3882), 3 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:25,617 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1294.0) internal successors, (3882), 3 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:25,617 INFO L175 Difference]: Start difference. First operand has 1143 places, 1294 transitions, 4105 flow. Second operand 2 states and 2323 transitions. [2022-11-20 11:45:25,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1143 places, 1067 transitions, 3725 flow [2022-11-20 11:45:25,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1143 places, 1067 transitions, 2393 flow, removed 666 selfloop flow, removed 0 redundant places. [2022-11-20 11:45:25,639 INFO L231 Difference]: Finished difference. Result has 1143 places, 1055 transitions, 2295 flow [2022-11-20 11:45:25,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1294, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=1142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1067, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1067, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2295, PETRI_PLACES=1143, PETRI_TRANSITIONS=1055} [2022-11-20 11:45:25,640 INFO L288 CegarLoopForPetriNet]: 1143 programPoint places, 0 predicate places. [2022-11-20 11:45:25,640 INFO L495 AbstractCegarLoop]: Abstraction has has 1143 places, 1055 transitions, 2295 flow [2022-11-20 11:45:25,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1030.5) internal successors, (2061), 2 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:25,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:25,641 INFO L209 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] [2022-11-20 11:45:25,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2022-11-20 11:45:25,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash 130464839, now seen corresponding path program 1 times [2022-11-20 11:45:25,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:25,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227209344] [2022-11-20 11:45:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:25,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:25,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227209344] [2022-11-20 11:45:25,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227209344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:25,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:25,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:45:25,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168710694] [2022-11-20 11:45:25,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:25,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:45:25,678 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1023 out of 1294 [2022-11-20 11:45:25,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1143 places, 1055 transitions, 2295 flow. Second operand has 3 states, 3 states have (on average 1024.0) internal successors, (3072), 3 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:25,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:25,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1023 of 1294 [2022-11-20 11:45:25,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:27,249 INFO L130 PetriNetUnfolder]: 0/1851 cut-off events. [2022-11-20 11:45:27,249 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-20 11:45:27,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2228 conditions, 1851 events. 0/1851 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6625 event pairs, 0 based on Foata normal form. 0/1814 useless extension candidates. Maximal degree in co-relation 0. Up to 222 conditions per place. [2022-11-20 11:45:27,253 INFO L137 encePairwiseOnDemand]: 1291/1294 looper letters, 46 selfloop transitions, 2 changer transitions 0/1059 dead transitions. [2022-11-20 11:45:27,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1133 places, 1059 transitions, 2399 flow [2022-11-20 11:45:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:45:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3118 transitions. [2022-11-20 11:45:27,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8031942297784647 [2022-11-20 11:45:27,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3118 transitions. [2022-11-20 11:45:27,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3118 transitions. [2022-11-20 11:45:27,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:27,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3118 transitions. [2022-11-20 11:45:27,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1039.3333333333333) internal successors, (3118), 3 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:27,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1294.0) internal successors, (5176), 4 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:27,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1294.0) internal successors, (5176), 4 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:27,259 INFO L175 Difference]: Start difference. First operand has 1143 places, 1055 transitions, 2295 flow. Second operand 3 states and 3118 transitions. [2022-11-20 11:45:27,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1133 places, 1059 transitions, 2399 flow [2022-11-20 11:45:27,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1133 places, 1059 transitions, 2399 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:45:27,269 INFO L231 Difference]: Finished difference. Result has 1134 places, 1056 transitions, 2307 flow [2022-11-20 11:45:27,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1294, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=1131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2307, PETRI_PLACES=1134, PETRI_TRANSITIONS=1056} [2022-11-20 11:45:27,269 INFO L288 CegarLoopForPetriNet]: 1143 programPoint places, -9 predicate places. [2022-11-20 11:45:27,269 INFO L495 AbstractCegarLoop]: Abstraction has has 1134 places, 1056 transitions, 2307 flow [2022-11-20 11:45:27,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1024.0) internal successors, (3072), 3 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:27,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:27,270 INFO L209 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] [2022-11-20 11:45:27,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2022-11-20 11:45:27,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1851341088, now seen corresponding path program 1 times [2022-11-20 11:45:27,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:27,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250432606] [2022-11-20 11:45:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:27,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:27,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250432606] [2022-11-20 11:45:27,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250432606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344303182] [2022-11-20 11:45:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:27,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:27,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:27,319 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:27,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-20 11:45:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:45:28,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:28,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:28,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344303182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:28,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:28,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:45:28,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145503407] [2022-11-20 11:45:28,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:28,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:45:28,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:28,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:45:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:45:28,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1022 out of 1294 [2022-11-20 11:45:28,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1134 places, 1056 transitions, 2307 flow. Second operand has 10 states, 10 states have (on average 1024.3) internal successors, (10243), 10 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:28,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:28,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1022 of 1294 [2022-11-20 11:45:28,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:30,665 INFO L130 PetriNetUnfolder]: 0/1825 cut-off events. [2022-11-20 11:45:30,665 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-11-20 11:45:30,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2313 conditions, 1825 events. 0/1825 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6469 event pairs, 0 based on Foata normal form. 2/1827 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2022-11-20 11:45:30,669 INFO L137 encePairwiseOnDemand]: 1288/1294 looper letters, 47 selfloop transitions, 9 changer transitions 0/1066 dead transitions. [2022-11-20 11:45:30,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1142 places, 1066 transitions, 2441 flow [2022-11-20 11:45:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:45:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:45:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9256 transitions. [2022-11-20 11:45:30,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7947793233728319 [2022-11-20 11:45:30,675 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9256 transitions. [2022-11-20 11:45:30,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9256 transitions. [2022-11-20 11:45:30,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:30,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9256 transitions. [2022-11-20 11:45:30,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1028.4444444444443) internal successors, (9256), 9 states have internal predecessors, (9256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:30,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1294.0) internal successors, (12940), 10 states have internal predecessors, (12940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:30,688 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1294.0) internal successors, (12940), 10 states have internal predecessors, (12940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:30,688 INFO L175 Difference]: Start difference. First operand has 1134 places, 1056 transitions, 2307 flow. Second operand 9 states and 9256 transitions. [2022-11-20 11:45:30,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1142 places, 1066 transitions, 2441 flow [2022-11-20 11:45:30,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1141 places, 1066 transitions, 2439 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:45:30,698 INFO L231 Difference]: Finished difference. Result has 1144 places, 1062 transitions, 2355 flow [2022-11-20 11:45:30,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1294, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1056, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2355, PETRI_PLACES=1144, PETRI_TRANSITIONS=1062} [2022-11-20 11:45:30,698 INFO L288 CegarLoopForPetriNet]: 1143 programPoint places, 1 predicate places. [2022-11-20 11:45:30,699 INFO L495 AbstractCegarLoop]: Abstraction has has 1144 places, 1062 transitions, 2355 flow [2022-11-20 11:45:30,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1024.3) internal successors, (10243), 10 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:30,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:30,700 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:30,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-11-20 11:45:30,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-11-20 11:45:30,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash 900036885, now seen corresponding path program 1 times [2022-11-20 11:45:30,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:30,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145166416] [2022-11-20 11:45:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:30,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:30,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145166416] [2022-11-20 11:45:30,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145166416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050275407] [2022-11-20 11:45:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:30,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:30,997 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:30,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-11-20 11:45:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:45:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:32,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:32,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050275407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:32,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:32,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:45:32,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130817679] [2022-11-20 11:45:32,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:32,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:45:32,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:45:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:45:32,639 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1022 out of 1294 [2022-11-20 11:45:32,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1144 places, 1062 transitions, 2355 flow. Second operand has 18 states, 18 states have (on average 1024.611111111111) internal successors, (18443), 18 states have internal predecessors, (18443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:32,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:32,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1022 of 1294 [2022-11-20 11:45:32,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:34,585 INFO L130 PetriNetUnfolder]: 0/1773 cut-off events. [2022-11-20 11:45:34,585 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-11-20 11:45:34,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2538 conditions, 1773 events. 0/1773 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6137 event pairs, 0 based on Foata normal form. 4/1777 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-11-20 11:45:34,588 INFO L137 encePairwiseOnDemand]: 1288/1294 looper letters, 55 selfloop transitions, 21 changer transitions 0/1086 dead transitions. [2022-11-20 11:45:34,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1164 places, 1086 transitions, 2615 flow [2022-11-20 11:45:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:45:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:45:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21542 transitions. [2022-11-20 11:45:34,600 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7927430632221977 [2022-11-20 11:45:34,600 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 21542 transitions. [2022-11-20 11:45:34,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 21542 transitions. [2022-11-20 11:45:34,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:34,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 21542 transitions. [2022-11-20 11:45:34,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1025.8095238095239) internal successors, (21542), 21 states have internal predecessors, (21542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:34,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1294.0) internal successors, (28468), 22 states have internal predecessors, (28468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:34,633 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1294.0) internal successors, (28468), 22 states have internal predecessors, (28468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:34,633 INFO L175 Difference]: Start difference. First operand has 1144 places, 1062 transitions, 2355 flow. Second operand 21 states and 21542 transitions. [2022-11-20 11:45:34,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1164 places, 1086 transitions, 2615 flow [2022-11-20 11:45:34,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1163 places, 1086 transitions, 2601 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:45:34,645 INFO L231 Difference]: Finished difference. Result has 1168 places, 1075 transitions, 2479 flow [2022-11-20 11:45:34,645 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1294, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=1143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2479, PETRI_PLACES=1168, PETRI_TRANSITIONS=1075} [2022-11-20 11:45:34,645 INFO L288 CegarLoopForPetriNet]: 1143 programPoint places, 25 predicate places. [2022-11-20 11:45:34,645 INFO L495 AbstractCegarLoop]: Abstraction has has 1168 places, 1075 transitions, 2479 flow [2022-11-20 11:45:34,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1024.611111111111) internal successors, (18443), 18 states have internal predecessors, (18443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:34,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:34,647 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:34,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:34,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-11-20 11:45:34,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash 166186763, now seen corresponding path program 1 times [2022-11-20 11:45:34,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:34,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220077816] [2022-11-20 11:45:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:34,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:35,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:35,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220077816] [2022-11-20 11:45:35,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220077816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:35,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806586248] [2022-11-20 11:45:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:35,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:35,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:35,045 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:35,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-20 11:45:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:36,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:45:36,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:36,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:36,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806586248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:36,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:36,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:45:36,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983131970] [2022-11-20 11:45:36,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:36,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:45:36,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:36,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:45:36,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:45:36,966 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1022 out of 1294 [2022-11-20 11:45:36,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1168 places, 1075 transitions, 2479 flow. Second operand has 34 states, 34 states have (on average 1024.7941176470588) internal successors, (34843), 34 states have internal predecessors, (34843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:36,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:36,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1022 of 1294 [2022-11-20 11:45:36,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:39,219 INFO L130 PetriNetUnfolder]: 0/1669 cut-off events. [2022-11-20 11:45:39,219 INFO L131 PetriNetUnfolder]: For 870/870 co-relation queries the response was YES. [2022-11-20 11:45:39,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2675 conditions, 1669 events. 0/1669 cut-off events. For 870/870 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5465 event pairs, 0 based on Foata normal form. 8/1677 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-11-20 11:45:39,223 INFO L137 encePairwiseOnDemand]: 1288/1294 looper letters, 71 selfloop transitions, 45 changer transitions 0/1126 dead transitions. [2022-11-20 11:45:39,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1212 places, 1126 transitions, 3027 flow [2022-11-20 11:45:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:45:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:45:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46114 transitions. [2022-11-20 11:45:39,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791928559161944 [2022-11-20 11:45:39,244 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 46114 transitions. [2022-11-20 11:45:39,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 46114 transitions. [2022-11-20 11:45:39,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:39,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 46114 transitions. [2022-11-20 11:45:39,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1024.7555555555555) internal successors, (46114), 45 states have internal predecessors, (46114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:39,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1294.0) internal successors, (59524), 46 states have internal predecessors, (59524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:39,304 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1294.0) internal successors, (59524), 46 states have internal predecessors, (59524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:39,304 INFO L175 Difference]: Start difference. First operand has 1168 places, 1075 transitions, 2479 flow. Second operand 45 states and 46114 transitions. [2022-11-20 11:45:39,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1212 places, 1126 transitions, 3027 flow [2022-11-20 11:45:39,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1206 places, 1126 transitions, 2987 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:45:39,319 INFO L231 Difference]: Finished difference. Result has 1215 places, 1100 transitions, 2757 flow [2022-11-20 11:45:39,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1294, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1075, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1052, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2757, PETRI_PLACES=1215, PETRI_TRANSITIONS=1100} [2022-11-20 11:45:39,319 INFO L288 CegarLoopForPetriNet]: 1143 programPoint places, 72 predicate places. [2022-11-20 11:45:39,319 INFO L495 AbstractCegarLoop]: Abstraction has has 1215 places, 1100 transitions, 2757 flow [2022-11-20 11:45:39,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1024.7941176470588) internal successors, (34843), 34 states have internal predecessors, (34843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:39,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:39,323 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:39,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-11-20 11:45:39,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-11-20 11:45:39,523 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash 130693927, now seen corresponding path program 1 times [2022-11-20 11:45:39,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072993139] [2022-11-20 11:45:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:39,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:40,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072993139] [2022-11-20 11:45:40,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072993139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:40,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045466632] [2022-11-20 11:45:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:40,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:40,146 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:40,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-20 11:45:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:41,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:45:41,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:41,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:42,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045466632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:42,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:42,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:45:42,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642649559] [2022-11-20 11:45:42,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:42,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:45:42,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:42,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:45:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:45:42,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1022 out of 1294 [2022-11-20 11:45:43,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1215 places, 1100 transitions, 2757 flow. Second operand has 66 states, 66 states have (on average 1024.8939393939395) internal successors, (67643), 66 states have internal predecessors, (67643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:43,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:43,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1022 of 1294 [2022-11-20 11:45:43,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:45:46,724 INFO L130 PetriNetUnfolder]: 0/1461 cut-off events. [2022-11-20 11:45:46,724 INFO L131 PetriNetUnfolder]: For 2950/2950 co-relation queries the response was YES. [2022-11-20 11:45:46,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2559 conditions, 1461 events. 0/1461 cut-off events. For 2950/2950 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4092 event pairs, 0 based on Foata normal form. 16/1477 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2022-11-20 11:45:46,727 INFO L137 encePairwiseOnDemand]: 1288/1294 looper letters, 103 selfloop transitions, 93 changer transitions 0/1206 dead transitions. [2022-11-20 11:45:46,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1307 places, 1206 transitions, 3997 flow [2022-11-20 11:45:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:45:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:45:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95258 transitions. [2022-11-20 11:45:46,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7915607186186037 [2022-11-20 11:45:46,765 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 95258 transitions. [2022-11-20 11:45:46,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 95258 transitions. [2022-11-20 11:45:46,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:45:46,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 95258 transitions. [2022-11-20 11:45:46,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1024.279569892473) internal successors, (95258), 93 states have internal predecessors, (95258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:46,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1294.0) internal successors, (121636), 94 states have internal predecessors, (121636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:46,897 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1294.0) internal successors, (121636), 94 states have internal predecessors, (121636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:46,897 INFO L175 Difference]: Start difference. First operand has 1215 places, 1100 transitions, 2757 flow. Second operand 93 states and 95258 transitions. [2022-11-20 11:45:46,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1307 places, 1206 transitions, 3997 flow [2022-11-20 11:45:46,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1289 places, 1206 transitions, 3909 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:45:46,922 INFO L231 Difference]: Finished difference. Result has 1306 places, 1149 transitions, 3391 flow [2022-11-20 11:45:46,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1294, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=1197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3391, PETRI_PLACES=1306, PETRI_TRANSITIONS=1149} [2022-11-20 11:45:46,923 INFO L288 CegarLoopForPetriNet]: 1143 programPoint places, 163 predicate places. [2022-11-20 11:45:46,923 INFO L495 AbstractCegarLoop]: Abstraction has has 1306 places, 1149 transitions, 3391 flow [2022-11-20 11:45:46,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1024.8939393939395) internal successors, (67643), 66 states have internal predecessors, (67643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:46,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:45:46,931 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:46,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-11-20 11:45:47,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:47,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:45:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash 364991519, now seen corresponding path program 1 times [2022-11-20 11:45:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:47,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880296755] [2022-11-20 11:45:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:47,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:49,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:49,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880296755] [2022-11-20 11:45:49,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880296755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:49,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025218279] [2022-11-20 11:45:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:49,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:49,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:49,618 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:49,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-11-20 11:45:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:45:51,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:51,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:55,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025218279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:55,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:55,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:45:55,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359990602] [2022-11-20 11:45:55,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:45:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:45:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:45:55,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1022 out of 1294 [2022-11-20 11:45:55,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1306 places, 1149 transitions, 3391 flow. Second operand has 130 states, 130 states have (on average 1024.946153846154) internal successors, (133243), 130 states have internal predecessors, (133243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:55,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:45:55,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1022 of 1294 [2022-11-20 11:45:55,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:00,344 INFO L130 PetriNetUnfolder]: 0/1370 cut-off events. [2022-11-20 11:46:00,344 INFO L131 PetriNetUnfolder]: For 4177/4177 co-relation queries the response was YES. [2022-11-20 11:46:00,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 1370 events. 0/1370 cut-off events. For 4177/4177 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3521 event pairs, 0 based on Foata normal form. 7/1377 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2022-11-20 11:46:00,346 INFO L137 encePairwiseOnDemand]: 1289/1294 looper letters, 114 selfloop transitions, 112 changer transitions 0/1224 dead transitions. [2022-11-20 11:46:00,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1406 places, 1224 transitions, 4497 flow [2022-11-20 11:46:00,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-20 11:46:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2022-11-20 11:46:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116741 transitions. [2022-11-20 11:46:00,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913785623254427 [2022-11-20 11:46:00,392 INFO L72 ComplementDD]: Start complementDD. Operand 114 states and 116741 transitions. [2022-11-20 11:46:00,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 116741 transitions. [2022-11-20 11:46:00,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:00,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 114 states and 116741 transitions. [2022-11-20 11:46:00,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 115 states, 114 states have (on average 1024.0438596491229) internal successors, (116741), 114 states have internal predecessors, (116741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:00,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 115 states, 115 states have (on average 1294.0) internal successors, (148810), 115 states have internal predecessors, (148810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:00,555 INFO L81 ComplementDD]: Finished complementDD. Result has 115 states, 115 states have (on average 1294.0) internal successors, (148810), 115 states have internal predecessors, (148810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:00,555 INFO L175 Difference]: Start difference. First operand has 1306 places, 1149 transitions, 3391 flow. Second operand 114 states and 116741 transitions. [2022-11-20 11:46:00,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1406 places, 1224 transitions, 4497 flow [2022-11-20 11:46:00,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1333 places, 1224 transitions, 4115 flow, removed 24 selfloop flow, removed 73 redundant places. [2022-11-20 11:46:00,574 INFO L231 Difference]: Finished difference. Result has 1333 places, 1154 transitions, 3435 flow [2022-11-20 11:46:00,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1294, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=1220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1042, PETRI_DIFFERENCE_SUBTRAHEND_STATES=114, PETRI_FLOW=3435, PETRI_PLACES=1333, PETRI_TRANSITIONS=1154} [2022-11-20 11:46:00,575 INFO L288 CegarLoopForPetriNet]: 1143 programPoint places, 190 predicate places. [2022-11-20 11:46:00,575 INFO L495 AbstractCegarLoop]: Abstraction has has 1333 places, 1154 transitions, 3435 flow [2022-11-20 11:46:00,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1024.946153846154) internal successors, (133243), 130 states have internal predecessors, (133243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:00,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:00,586 INFO L209 CegarLoopForPetriNet]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:00,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-11-20 11:46:00,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:00,786 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1046740910, now seen corresponding path program 1 times [2022-11-20 11:46:00,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:00,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321484323] [2022-11-20 11:46:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:00,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:46:00,856 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:46:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:46:00,974 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:46:00,974 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:46:00,975 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:46:00,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:46:00,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2022-11-20 11:46:00,975 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:00,976 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:46:00,976 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2022-11-20 11:46:01,099 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:46:01,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1172 places, 1327 transitions, 4250 flow [2022-11-20 11:46:02,964 INFO L130 PetriNetUnfolder]: 384/2804 cut-off events. [2022-11-20 11:46:02,964 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2022-11-20 11:46:03,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3660 conditions, 2804 events. 384/2804 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 10611 event pairs, 0 based on Foata normal form. 0/2342 useless extension candidates. Maximal degree in co-relation 3519. Up to 78 conditions per place. [2022-11-20 11:46:03,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 1172 places, 1327 transitions, 4250 flow [2022-11-20 11:46:03,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1172 places, 1327 transitions, 4250 flow [2022-11-20 11:46:03,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:46:03,324 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:46:03,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:46:03,370 INFO L130 PetriNetUnfolder]: 4/88 cut-off events. [2022-11-20 11:46:03,370 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:46:03,370 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:03,370 INFO L209 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] [2022-11-20 11:46:03,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash -728070938, now seen corresponding path program 1 times [2022-11-20 11:46:03,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:03,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708546795] [2022-11-20 11:46:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:03,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:03,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708546795] [2022-11-20 11:46:03,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708546795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:03,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:03,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:03,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335888760] [2022-11-20 11:46:03,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:03,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:46:03,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:03,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:46:03,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:46:03,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1056 out of 1327 [2022-11-20 11:46:03,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1172 places, 1327 transitions, 4250 flow. Second operand has 2 states, 2 states have (on average 1056.5) internal successors, (2113), 2 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:03,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:03,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1056 of 1327 [2022-11-20 11:46:03,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:05,288 INFO L130 PetriNetUnfolder]: 0/2381 cut-off events. [2022-11-20 11:46:05,288 INFO L131 PetriNetUnfolder]: For 10583/10583 co-relation queries the response was YES. [2022-11-20 11:46:05,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3276 conditions, 2381 events. 0/2381 cut-off events. For 10583/10583 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 10107 event pairs, 0 based on Foata normal form. 4382/6685 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-20 11:46:05,292 INFO L137 encePairwiseOnDemand]: 1095/1327 looper letters, 38 selfloop transitions, 0 changer transitions 12/1094 dead transitions. [2022-11-20 11:46:05,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1172 places, 1094 transitions, 3860 flow [2022-11-20 11:46:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:46:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:46:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2382 transitions. [2022-11-20 11:46:05,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8975131876412962 [2022-11-20 11:46:05,295 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2382 transitions. [2022-11-20 11:46:05,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2382 transitions. [2022-11-20 11:46:05,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:05,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2382 transitions. [2022-11-20 11:46:05,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1191.0) internal successors, (2382), 2 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:05,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1327.0) internal successors, (3981), 3 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:05,298 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1327.0) internal successors, (3981), 3 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:05,298 INFO L175 Difference]: Start difference. First operand has 1172 places, 1327 transitions, 4250 flow. Second operand 2 states and 2382 transitions. [2022-11-20 11:46:05,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1172 places, 1094 transitions, 3860 flow [2022-11-20 11:46:05,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 1094 transitions, 2454 flow, removed 703 selfloop flow, removed 0 redundant places. [2022-11-20 11:46:05,335 INFO L231 Difference]: Finished difference. Result has 1172 places, 1082 transitions, 2354 flow [2022-11-20 11:46:05,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1327, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=1171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2354, PETRI_PLACES=1172, PETRI_TRANSITIONS=1082} [2022-11-20 11:46:05,336 INFO L288 CegarLoopForPetriNet]: 1172 programPoint places, 0 predicate places. [2022-11-20 11:46:05,336 INFO L495 AbstractCegarLoop]: Abstraction has has 1172 places, 1082 transitions, 2354 flow [2022-11-20 11:46:05,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1056.5) internal successors, (2113), 2 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:05,336 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:05,336 INFO L209 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] [2022-11-20 11:46:05,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2022-11-20 11:46:05,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:05,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1021473945, now seen corresponding path program 1 times [2022-11-20 11:46:05,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:05,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781767866] [2022-11-20 11:46:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:05,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:05,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:05,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781767866] [2022-11-20 11:46:05,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781767866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:05,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:05,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:05,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903734667] [2022-11-20 11:46:05,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:05,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:05,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:05,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1049 out of 1327 [2022-11-20 11:46:05,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1172 places, 1082 transitions, 2354 flow. Second operand has 3 states, 3 states have (on average 1050.0) internal successors, (3150), 3 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:05,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:05,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1049 of 1327 [2022-11-20 11:46:05,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:07,142 INFO L130 PetriNetUnfolder]: 0/1900 cut-off events. [2022-11-20 11:46:07,142 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-20 11:46:07,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 1900 events. 0/1900 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6809 event pairs, 0 based on Foata normal form. 0/1862 useless extension candidates. Maximal degree in co-relation 0. Up to 228 conditions per place. [2022-11-20 11:46:07,145 INFO L137 encePairwiseOnDemand]: 1324/1327 looper letters, 47 selfloop transitions, 2 changer transitions 0/1086 dead transitions. [2022-11-20 11:46:07,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1162 places, 1086 transitions, 2460 flow [2022-11-20 11:46:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:46:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3197 transitions. [2022-11-20 11:46:07,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8030645566440593 [2022-11-20 11:46:07,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3197 transitions. [2022-11-20 11:46:07,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3197 transitions. [2022-11-20 11:46:07,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:07,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3197 transitions. [2022-11-20 11:46:07,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1065.6666666666667) internal successors, (3197), 3 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:07,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1327.0) internal successors, (5308), 4 states have internal predecessors, (5308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:07,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1327.0) internal successors, (5308), 4 states have internal predecessors, (5308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:07,151 INFO L175 Difference]: Start difference. First operand has 1172 places, 1082 transitions, 2354 flow. Second operand 3 states and 3197 transitions. [2022-11-20 11:46:07,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1162 places, 1086 transitions, 2460 flow [2022-11-20 11:46:07,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1162 places, 1086 transitions, 2460 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:46:07,160 INFO L231 Difference]: Finished difference. Result has 1163 places, 1083 transitions, 2366 flow [2022-11-20 11:46:07,160 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1327, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=1160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1080, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2366, PETRI_PLACES=1163, PETRI_TRANSITIONS=1083} [2022-11-20 11:46:07,160 INFO L288 CegarLoopForPetriNet]: 1172 programPoint places, -9 predicate places. [2022-11-20 11:46:07,161 INFO L495 AbstractCegarLoop]: Abstraction has has 1163 places, 1083 transitions, 2366 flow [2022-11-20 11:46:07,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1050.0) internal successors, (3150), 3 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:07,161 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:07,161 INFO L209 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] [2022-11-20 11:46:07,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2022-11-20 11:46:07,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:07,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1570203072, now seen corresponding path program 1 times [2022-11-20 11:46:07,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:07,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57698519] [2022-11-20 11:46:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:07,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:07,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:07,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57698519] [2022-11-20 11:46:07,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57698519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:07,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809601093] [2022-11-20 11:46:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:07,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:07,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:07,208 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:07,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-20 11:46:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:46:08,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:08,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:08,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809601093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:08,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:08,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:46:08,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792560247] [2022-11-20 11:46:08,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:46:08,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:46:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:46:08,829 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1048 out of 1327 [2022-11-20 11:46:08,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1163 places, 1083 transitions, 2366 flow. Second operand has 10 states, 10 states have (on average 1050.3) internal successors, (10503), 10 states have internal predecessors, (10503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:08,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:08,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1048 of 1327 [2022-11-20 11:46:08,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:10,800 INFO L130 PetriNetUnfolder]: 0/1874 cut-off events. [2022-11-20 11:46:10,800 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-20 11:46:10,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1874 events. 0/1874 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6667 event pairs, 0 based on Foata normal form. 2/1876 useless extension candidates. Maximal degree in co-relation 0. Up to 147 conditions per place. [2022-11-20 11:46:10,805 INFO L137 encePairwiseOnDemand]: 1321/1327 looper letters, 48 selfloop transitions, 9 changer transitions 0/1093 dead transitions. [2022-11-20 11:46:10,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1171 places, 1093 transitions, 2502 flow [2022-11-20 11:46:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:46:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:46:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9491 transitions. [2022-11-20 11:46:10,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7946914510591978 [2022-11-20 11:46:10,811 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9491 transitions. [2022-11-20 11:46:10,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9491 transitions. [2022-11-20 11:46:10,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:10,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9491 transitions. [2022-11-20 11:46:10,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1054.5555555555557) internal successors, (9491), 9 states have internal predecessors, (9491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:10,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1327.0) internal successors, (13270), 10 states have internal predecessors, (13270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:10,824 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1327.0) internal successors, (13270), 10 states have internal predecessors, (13270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:10,824 INFO L175 Difference]: Start difference. First operand has 1163 places, 1083 transitions, 2366 flow. Second operand 9 states and 9491 transitions. [2022-11-20 11:46:10,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1171 places, 1093 transitions, 2502 flow [2022-11-20 11:46:10,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1170 places, 1093 transitions, 2500 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:46:10,834 INFO L231 Difference]: Finished difference. Result has 1173 places, 1089 transitions, 2414 flow [2022-11-20 11:46:10,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1327, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2414, PETRI_PLACES=1173, PETRI_TRANSITIONS=1089} [2022-11-20 11:46:10,835 INFO L288 CegarLoopForPetriNet]: 1172 programPoint places, 1 predicate places. [2022-11-20 11:46:10,835 INFO L495 AbstractCegarLoop]: Abstraction has has 1173 places, 1089 transitions, 2414 flow [2022-11-20 11:46:10,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1050.3) internal successors, (10503), 10 states have internal predecessors, (10503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:10,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:10,837 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:10,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:11,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:11,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:11,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:11,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2090483531, now seen corresponding path program 1 times [2022-11-20 11:46:11,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:11,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664716822] [2022-11-20 11:46:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:11,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:11,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:11,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664716822] [2022-11-20 11:46:11,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664716822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:11,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808337641] [2022-11-20 11:46:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:11,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:11,122 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:11,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-20 11:46:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:12,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:46:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:12,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:12,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808337641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:12,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:12,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:46:12,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040823825] [2022-11-20 11:46:12,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:12,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:46:12,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:12,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:46:12,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:46:12,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1048 out of 1327 [2022-11-20 11:46:12,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1173 places, 1089 transitions, 2414 flow. Second operand has 18 states, 18 states have (on average 1050.611111111111) internal successors, (18911), 18 states have internal predecessors, (18911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:12,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:12,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1048 of 1327 [2022-11-20 11:46:12,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:14,845 INFO L130 PetriNetUnfolder]: 0/1822 cut-off events. [2022-11-20 11:46:14,846 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-11-20 11:46:14,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 1822 events. 0/1822 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6320 event pairs, 0 based on Foata normal form. 4/1826 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2022-11-20 11:46:14,851 INFO L137 encePairwiseOnDemand]: 1321/1327 looper letters, 56 selfloop transitions, 21 changer transitions 0/1113 dead transitions. [2022-11-20 11:46:14,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1193 places, 1113 transitions, 2676 flow [2022-11-20 11:46:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:46:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:46:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22089 transitions. [2022-11-20 11:46:14,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7926579825600172 [2022-11-20 11:46:14,863 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 22089 transitions. [2022-11-20 11:46:14,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 22089 transitions. [2022-11-20 11:46:14,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:14,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 22089 transitions. [2022-11-20 11:46:14,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1051.857142857143) internal successors, (22089), 21 states have internal predecessors, (22089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:14,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1327.0) internal successors, (29194), 22 states have internal predecessors, (29194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:14,896 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1327.0) internal successors, (29194), 22 states have internal predecessors, (29194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:14,896 INFO L175 Difference]: Start difference. First operand has 1173 places, 1089 transitions, 2414 flow. Second operand 21 states and 22089 transitions. [2022-11-20 11:46:14,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1193 places, 1113 transitions, 2676 flow [2022-11-20 11:46:14,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1192 places, 1113 transitions, 2662 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:46:14,912 INFO L231 Difference]: Finished difference. Result has 1197 places, 1102 transitions, 2538 flow [2022-11-20 11:46:14,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1327, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=1172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2538, PETRI_PLACES=1197, PETRI_TRANSITIONS=1102} [2022-11-20 11:46:14,913 INFO L288 CegarLoopForPetriNet]: 1172 programPoint places, 25 predicate places. [2022-11-20 11:46:14,913 INFO L495 AbstractCegarLoop]: Abstraction has has 1197 places, 1102 transitions, 2538 flow [2022-11-20 11:46:14,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1050.611111111111) internal successors, (18911), 18 states have internal predecessors, (18911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:14,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:14,914 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:14,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:15,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:15,115 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:15,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1676030805, now seen corresponding path program 1 times [2022-11-20 11:46:15,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:15,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922957432] [2022-11-20 11:46:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:15,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:15,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922957432] [2022-11-20 11:46:15,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922957432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562033014] [2022-11-20 11:46:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:15,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:15,308 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:15,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-20 11:46:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:46:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:16,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:17,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562033014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:17,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:17,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:46:17,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611292359] [2022-11-20 11:46:17,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:17,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:46:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:46:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:46:17,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1048 out of 1327 [2022-11-20 11:46:17,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1197 places, 1102 transitions, 2538 flow. Second operand has 34 states, 34 states have (on average 1050.7941176470588) internal successors, (35727), 34 states have internal predecessors, (35727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:17,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:17,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1048 of 1327 [2022-11-20 11:46:17,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:19,800 INFO L130 PetriNetUnfolder]: 0/1718 cut-off events. [2022-11-20 11:46:19,800 INFO L131 PetriNetUnfolder]: For 897/897 co-relation queries the response was YES. [2022-11-20 11:46:19,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2754 conditions, 1718 events. 0/1718 cut-off events. For 897/897 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5639 event pairs, 0 based on Foata normal form. 8/1726 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-11-20 11:46:19,804 INFO L137 encePairwiseOnDemand]: 1321/1327 looper letters, 72 selfloop transitions, 45 changer transitions 0/1153 dead transitions. [2022-11-20 11:46:19,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1241 places, 1153 transitions, 3088 flow [2022-11-20 11:46:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:46:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:46:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47285 transitions. [2022-11-20 11:46:19,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791844595160345 [2022-11-20 11:46:19,824 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 47285 transitions. [2022-11-20 11:46:19,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 47285 transitions. [2022-11-20 11:46:19,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:19,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 47285 transitions. [2022-11-20 11:46:20,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1050.7777777777778) internal successors, (47285), 45 states have internal predecessors, (47285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:20,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1327.0) internal successors, (61042), 46 states have internal predecessors, (61042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:20,098 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1327.0) internal successors, (61042), 46 states have internal predecessors, (61042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:20,098 INFO L175 Difference]: Start difference. First operand has 1197 places, 1102 transitions, 2538 flow. Second operand 45 states and 47285 transitions. [2022-11-20 11:46:20,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1241 places, 1153 transitions, 3088 flow [2022-11-20 11:46:20,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1235 places, 1153 transitions, 3048 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:46:20,112 INFO L231 Difference]: Finished difference. Result has 1244 places, 1127 transitions, 2816 flow [2022-11-20 11:46:20,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1327, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=1191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1079, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2816, PETRI_PLACES=1244, PETRI_TRANSITIONS=1127} [2022-11-20 11:46:20,113 INFO L288 CegarLoopForPetriNet]: 1172 programPoint places, 72 predicate places. [2022-11-20 11:46:20,113 INFO L495 AbstractCegarLoop]: Abstraction has has 1244 places, 1127 transitions, 2816 flow [2022-11-20 11:46:20,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1050.7941176470588) internal successors, (35727), 34 states have internal predecessors, (35727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:20,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:20,116 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:20,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-11-20 11:46:20,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-11-20 11:46:20,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:20,317 INFO L85 PathProgramCache]: Analyzing trace with hash 898999495, now seen corresponding path program 1 times [2022-11-20 11:46:20,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:20,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211565394] [2022-11-20 11:46:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:20,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:20,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:20,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211565394] [2022-11-20 11:46:20,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211565394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:20,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396773919] [2022-11-20 11:46:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:20,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:20,978 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:20,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-11-20 11:46:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:46:22,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:22,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:23,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396773919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:23,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:23,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:46:23,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459379391] [2022-11-20 11:46:23,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:23,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:46:23,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:46:23,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:46:23,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1048 out of 1327 [2022-11-20 11:46:23,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1244 places, 1127 transitions, 2816 flow. Second operand has 66 states, 66 states have (on average 1050.8939393939395) internal successors, (69359), 66 states have internal predecessors, (69359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:23,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:23,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1048 of 1327 [2022-11-20 11:46:23,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:27,670 INFO L130 PetriNetUnfolder]: 0/1510 cut-off events. [2022-11-20 11:46:27,670 INFO L131 PetriNetUnfolder]: For 3071/3071 co-relation queries the response was YES. [2022-11-20 11:46:27,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2651 conditions, 1510 events. 0/1510 cut-off events. For 3071/3071 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4275 event pairs, 0 based on Foata normal form. 16/1526 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-20 11:46:27,673 INFO L137 encePairwiseOnDemand]: 1321/1327 looper letters, 104 selfloop transitions, 93 changer transitions 0/1233 dead transitions. [2022-11-20 11:46:27,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1336 places, 1233 transitions, 4058 flow [2022-11-20 11:46:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:46:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:46:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97677 transitions. [2022-11-20 11:46:27,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914772589153317 [2022-11-20 11:46:27,944 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 97677 transitions. [2022-11-20 11:46:27,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 97677 transitions. [2022-11-20 11:46:27,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:27,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 97677 transitions. [2022-11-20 11:46:28,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1050.2903225806451) internal successors, (97677), 93 states have internal predecessors, (97677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1327.0) internal successors, (124738), 94 states have internal predecessors, (124738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,084 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1327.0) internal successors, (124738), 94 states have internal predecessors, (124738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,084 INFO L175 Difference]: Start difference. First operand has 1244 places, 1127 transitions, 2816 flow. Second operand 93 states and 97677 transitions. [2022-11-20 11:46:28,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1336 places, 1233 transitions, 4058 flow [2022-11-20 11:46:28,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1318 places, 1233 transitions, 3970 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:46:28,105 INFO L231 Difference]: Finished difference. Result has 1335 places, 1176 transitions, 3450 flow [2022-11-20 11:46:28,106 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1327, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=1226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1080, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3450, PETRI_PLACES=1335, PETRI_TRANSITIONS=1176} [2022-11-20 11:46:28,106 INFO L288 CegarLoopForPetriNet]: 1172 programPoint places, 163 predicate places. [2022-11-20 11:46:28,106 INFO L495 AbstractCegarLoop]: Abstraction has has 1335 places, 1176 transitions, 3450 flow [2022-11-20 11:46:28,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1050.8939393939395) internal successors, (69359), 66 states have internal predecessors, (69359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:28,111 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:28,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-11-20 11:46:28,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-11-20 11:46:28,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1838650815, now seen corresponding path program 1 times [2022-11-20 11:46:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:28,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442197694] [2022-11-20 11:46:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:28,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442197694] [2022-11-20 11:46:30,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442197694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254094309] [2022-11-20 11:46:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:30,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:30,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:30,810 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:30,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-20 11:46:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:32,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:46:32,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:32,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:36,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254094309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:36,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:36,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:46:36,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102784442] [2022-11-20 11:46:36,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:36,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:46:36,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:46:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:46:36,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1048 out of 1327 [2022-11-20 11:46:36,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1335 places, 1176 transitions, 3450 flow. Second operand has 130 states, 130 states have (on average 1050.946153846154) internal successors, (136623), 130 states have internal predecessors, (136623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:36,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:36,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1048 of 1327 [2022-11-20 11:46:36,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:41,590 INFO L130 PetriNetUnfolder]: 0/1406 cut-off events. [2022-11-20 11:46:41,590 INFO L131 PetriNetUnfolder]: For 4674/4674 co-relation queries the response was YES. [2022-11-20 11:46:41,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 1406 events. 0/1406 cut-off events. For 4674/4674 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3619 event pairs, 0 based on Foata normal form. 8/1414 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-20 11:46:41,592 INFO L137 encePairwiseOnDemand]: 1322/1327 looper letters, 117 selfloop transitions, 115 changer transitions 0/1256 dead transitions. [2022-11-20 11:46:41,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1438 places, 1256 transitions, 4622 flow [2022-11-20 11:46:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-20 11:46:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2022-11-20 11:46:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122856 transitions. [2022-11-20 11:46:41,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912971228721041 [2022-11-20 11:46:41,635 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 122856 transitions. [2022-11-20 11:46:41,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 122856 transitions. [2022-11-20 11:46:41,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:41,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 122856 transitions. [2022-11-20 11:46:41,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 1050.051282051282) internal successors, (122856), 117 states have internal predecessors, (122856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 1327.0) internal successors, (156586), 118 states have internal predecessors, (156586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,807 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 1327.0) internal successors, (156586), 118 states have internal predecessors, (156586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,807 INFO L175 Difference]: Start difference. First operand has 1335 places, 1176 transitions, 3450 flow. Second operand 117 states and 122856 transitions. [2022-11-20 11:46:41,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1438 places, 1256 transitions, 4622 flow [2022-11-20 11:46:41,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1365 places, 1256 transitions, 4230 flow, removed 25 selfloop flow, removed 73 redundant places. [2022-11-20 11:46:41,827 INFO L231 Difference]: Finished difference. Result has 1365 places, 1184 transitions, 3528 flow [2022-11-20 11:46:41,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1327, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=1249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1069, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=3528, PETRI_PLACES=1365, PETRI_TRANSITIONS=1184} [2022-11-20 11:46:41,827 INFO L288 CegarLoopForPetriNet]: 1172 programPoint places, 193 predicate places. [2022-11-20 11:46:41,827 INFO L495 AbstractCegarLoop]: Abstraction has has 1365 places, 1184 transitions, 3528 flow [2022-11-20 11:46:41,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1050.946153846154) internal successors, (136623), 130 states have internal predecessors, (136623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:41,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:41,838 INFO L209 CegarLoopForPetriNet]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:41,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-11-20 11:46:42,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-11-20 11:46:42,038 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1498250256, now seen corresponding path program 1 times [2022-11-20 11:46:42,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:42,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353313195] [2022-11-20 11:46:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:42,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:46:42,101 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:46:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:46:42,244 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:46:42,244 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:46:42,244 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:46:42,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:46:42,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2022-11-20 11:46:42,245 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:42,245 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:46:42,245 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2022-11-20 11:46:42,358 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:46:42,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1201 places, 1360 transitions, 4397 flow [2022-11-20 11:46:44,248 INFO L130 PetriNetUnfolder]: 394/2876 cut-off events. [2022-11-20 11:46:44,248 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2022-11-20 11:46:44,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3774 conditions, 2876 events. 394/2876 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 10958 event pairs, 0 based on Foata normal form. 0/2402 useless extension candidates. Maximal degree in co-relation 3632. Up to 80 conditions per place. [2022-11-20 11:46:44,468 INFO L82 GeneralOperation]: Start removeDead. Operand has 1201 places, 1360 transitions, 4397 flow [2022-11-20 11:46:44,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1201 places, 1360 transitions, 4397 flow [2022-11-20 11:46:44,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:46:44,545 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:46:44,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:46:44,550 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:46:44,550 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:46:44,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:44,550 INFO L209 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] [2022-11-20 11:46:44,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:44,551 INFO L85 PathProgramCache]: Analyzing trace with hash -141473050, now seen corresponding path program 1 times [2022-11-20 11:46:44,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:44,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071696454] [2022-11-20 11:46:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:44,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:44,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:44,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071696454] [2022-11-20 11:46:44,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071696454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:44,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:44,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:44,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052299020] [2022-11-20 11:46:44,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:44,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:46:44,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:44,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:46:44,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:46:44,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1082 out of 1360 [2022-11-20 11:46:44,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1201 places, 1360 transitions, 4397 flow. Second operand has 2 states, 2 states have (on average 1082.5) internal successors, (2165), 2 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:44,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:44,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1082 of 1360 [2022-11-20 11:46:44,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:46,352 INFO L130 PetriNetUnfolder]: 0/2442 cut-off events. [2022-11-20 11:46:46,352 INFO L131 PetriNetUnfolder]: For 11401/11401 co-relation queries the response was YES. [2022-11-20 11:46:46,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3380 conditions, 2442 events. 0/2442 cut-off events. For 11401/11401 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 10586 event pairs, 0 based on Foata normal form. 4614/6976 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-11-20 11:46:46,357 INFO L137 encePairwiseOnDemand]: 1122/1360 looper letters, 39 selfloop transitions, 0 changer transitions 12/1121 dead transitions. [2022-11-20 11:46:46,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1201 places, 1121 transitions, 3997 flow [2022-11-20 11:46:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:46:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:46:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2441 transitions. [2022-11-20 11:46:46,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8974264705882353 [2022-11-20 11:46:46,359 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2441 transitions. [2022-11-20 11:46:46,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2441 transitions. [2022-11-20 11:46:46,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:46,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2441 transitions. [2022-11-20 11:46:46,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1220.5) internal successors, (2441), 2 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1360.0) internal successors, (4080), 3 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,362 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1360.0) internal successors, (4080), 3 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,362 INFO L175 Difference]: Start difference. First operand has 1201 places, 1360 transitions, 4397 flow. Second operand 2 states and 2441 transitions. [2022-11-20 11:46:46,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1201 places, 1121 transitions, 3997 flow [2022-11-20 11:46:46,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1201 places, 1121 transitions, 2515 flow, removed 741 selfloop flow, removed 0 redundant places. [2022-11-20 11:46:46,389 INFO L231 Difference]: Finished difference. Result has 1201 places, 1109 transitions, 2413 flow [2022-11-20 11:46:46,390 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=1200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2413, PETRI_PLACES=1201, PETRI_TRANSITIONS=1109} [2022-11-20 11:46:46,390 INFO L288 CegarLoopForPetriNet]: 1201 programPoint places, 0 predicate places. [2022-11-20 11:46:46,390 INFO L495 AbstractCegarLoop]: Abstraction has has 1201 places, 1109 transitions, 2413 flow [2022-11-20 11:46:46,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1082.5) internal successors, (2165), 2 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,391 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:46,391 INFO L209 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] [2022-11-20 11:46:46,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2022-11-20 11:46:46,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:46,391 INFO L85 PathProgramCache]: Analyzing trace with hash -434876057, now seen corresponding path program 1 times [2022-11-20 11:46:46,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:46,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4641006] [2022-11-20 11:46:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:46,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:46,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:46,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4641006] [2022-11-20 11:46:46,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4641006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:46,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:46,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:46,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53542433] [2022-11-20 11:46:46,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:46,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:46,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:46,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:46,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:46,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1075 out of 1360 [2022-11-20 11:46:46,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1201 places, 1109 transitions, 2413 flow. Second operand has 3 states, 3 states have (on average 1076.0) internal successors, (3228), 3 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:46,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:46,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1075 of 1360 [2022-11-20 11:46:46,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:48,273 INFO L130 PetriNetUnfolder]: 0/1949 cut-off events. [2022-11-20 11:46:48,273 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-20 11:46:48,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346 conditions, 1949 events. 0/1949 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7013 event pairs, 0 based on Foata normal form. 0/1910 useless extension candidates. Maximal degree in co-relation 0. Up to 234 conditions per place. [2022-11-20 11:46:48,278 INFO L137 encePairwiseOnDemand]: 1357/1360 looper letters, 48 selfloop transitions, 2 changer transitions 0/1113 dead transitions. [2022-11-20 11:46:48,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1191 places, 1113 transitions, 2521 flow [2022-11-20 11:46:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:46:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3276 transitions. [2022-11-20 11:46:48,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8029411764705883 [2022-11-20 11:46:48,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3276 transitions. [2022-11-20 11:46:48,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3276 transitions. [2022-11-20 11:46:48,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:48,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3276 transitions. [2022-11-20 11:46:48,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1092.0) internal successors, (3276), 3 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1360.0) internal successors, (5440), 4 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,287 INFO L175 Difference]: Start difference. First operand has 1201 places, 1109 transitions, 2413 flow. Second operand 3 states and 3276 transitions. [2022-11-20 11:46:48,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1191 places, 1113 transitions, 2521 flow [2022-11-20 11:46:48,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1191 places, 1113 transitions, 2521 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:46:48,300 INFO L231 Difference]: Finished difference. Result has 1192 places, 1110 transitions, 2425 flow [2022-11-20 11:46:48,300 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=1189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2425, PETRI_PLACES=1192, PETRI_TRANSITIONS=1110} [2022-11-20 11:46:48,301 INFO L288 CegarLoopForPetriNet]: 1201 programPoint places, -9 predicate places. [2022-11-20 11:46:48,301 INFO L495 AbstractCegarLoop]: Abstraction has has 1192 places, 1110 transitions, 2425 flow [2022-11-20 11:46:48,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1076.0) internal successors, (3228), 3 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:48,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:48,302 INFO L209 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] [2022-11-20 11:46:48,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2022-11-20 11:46:48,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash 264582624, now seen corresponding path program 1 times [2022-11-20 11:46:48,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:48,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132969956] [2022-11-20 11:46:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:48,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:48,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:48,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132969956] [2022-11-20 11:46:48,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132969956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40878426] [2022-11-20 11:46:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:48,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:48,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:48,362 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:48,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-11-20 11:46:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:50,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:46:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:50,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:50,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40878426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:50,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:50,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:46:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851047366] [2022-11-20 11:46:50,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:50,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:46:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:46:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:46:50,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1074 out of 1360 [2022-11-20 11:46:50,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1192 places, 1110 transitions, 2425 flow. Second operand has 10 states, 10 states have (on average 1076.3) internal successors, (10763), 10 states have internal predecessors, (10763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:50,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:50,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1074 of 1360 [2022-11-20 11:46:50,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:52,212 INFO L130 PetriNetUnfolder]: 0/1923 cut-off events. [2022-11-20 11:46:52,213 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-20 11:46:52,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 1923 events. 0/1923 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6841 event pairs, 0 based on Foata normal form. 2/1925 useless extension candidates. Maximal degree in co-relation 0. Up to 151 conditions per place. [2022-11-20 11:46:52,218 INFO L137 encePairwiseOnDemand]: 1354/1360 looper letters, 49 selfloop transitions, 9 changer transitions 0/1120 dead transitions. [2022-11-20 11:46:52,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1200 places, 1120 transitions, 2563 flow [2022-11-20 11:46:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:46:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:46:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9726 transitions. [2022-11-20 11:46:52,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7946078431372549 [2022-11-20 11:46:52,224 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9726 transitions. [2022-11-20 11:46:52,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9726 transitions. [2022-11-20 11:46:52,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:52,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9726 transitions. [2022-11-20 11:46:52,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1080.6666666666667) internal successors, (9726), 9 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1360.0) internal successors, (13600), 10 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,239 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1360.0) internal successors, (13600), 10 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,239 INFO L175 Difference]: Start difference. First operand has 1192 places, 1110 transitions, 2425 flow. Second operand 9 states and 9726 transitions. [2022-11-20 11:46:52,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1200 places, 1120 transitions, 2563 flow [2022-11-20 11:46:52,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1199 places, 1120 transitions, 2561 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:46:52,251 INFO L231 Difference]: Finished difference. Result has 1202 places, 1116 transitions, 2473 flow [2022-11-20 11:46:52,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=1191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2473, PETRI_PLACES=1202, PETRI_TRANSITIONS=1116} [2022-11-20 11:46:52,252 INFO L288 CegarLoopForPetriNet]: 1201 programPoint places, 1 predicate places. [2022-11-20 11:46:52,252 INFO L495 AbstractCegarLoop]: Abstraction has has 1202 places, 1116 transitions, 2473 flow [2022-11-20 11:46:52,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1076.3) internal successors, (10763), 10 states have internal predecessors, (10763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:52,254 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:52,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-11-20 11:46:52,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-11-20 11:46:52,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:52,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1376333077, now seen corresponding path program 1 times [2022-11-20 11:46:52,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:52,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007159851] [2022-11-20 11:46:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:52,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:52,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:52,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007159851] [2022-11-20 11:46:52,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007159851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:52,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754858024] [2022-11-20 11:46:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:52,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:52,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:52,541 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:52,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-11-20 11:46:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:54,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:46:54,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:54,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:54,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754858024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:54,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:54,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:46:54,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695630853] [2022-11-20 11:46:54,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:54,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:46:54,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:54,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:46:54,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:46:54,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1074 out of 1360 [2022-11-20 11:46:54,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1202 places, 1116 transitions, 2473 flow. Second operand has 18 states, 18 states have (on average 1076.611111111111) internal successors, (19379), 18 states have internal predecessors, (19379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:54,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:54,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1074 of 1360 [2022-11-20 11:46:54,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:46:56,624 INFO L130 PetriNetUnfolder]: 0/1871 cut-off events. [2022-11-20 11:46:56,624 INFO L131 PetriNetUnfolder]: For 228/228 co-relation queries the response was YES. [2022-11-20 11:46:56,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 1871 events. 0/1871 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6515 event pairs, 0 based on Foata normal form. 4/1875 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2022-11-20 11:46:56,628 INFO L137 encePairwiseOnDemand]: 1354/1360 looper letters, 57 selfloop transitions, 21 changer transitions 0/1140 dead transitions. [2022-11-20 11:46:56,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1222 places, 1140 transitions, 2737 flow [2022-11-20 11:46:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:46:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:46:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22636 transitions. [2022-11-20 11:46:56,641 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7925770308123249 [2022-11-20 11:46:56,641 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 22636 transitions. [2022-11-20 11:46:56,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 22636 transitions. [2022-11-20 11:46:56,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:46:56,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 22636 transitions. [2022-11-20 11:46:56,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1077.904761904762) internal successors, (22636), 21 states have internal predecessors, (22636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:56,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1360.0) internal successors, (29920), 22 states have internal predecessors, (29920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:56,678 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1360.0) internal successors, (29920), 22 states have internal predecessors, (29920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:56,679 INFO L175 Difference]: Start difference. First operand has 1202 places, 1116 transitions, 2473 flow. Second operand 21 states and 22636 transitions. [2022-11-20 11:46:56,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1222 places, 1140 transitions, 2737 flow [2022-11-20 11:46:56,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1221 places, 1140 transitions, 2723 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:46:56,691 INFO L231 Difference]: Finished difference. Result has 1226 places, 1129 transitions, 2597 flow [2022-11-20 11:46:56,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=1201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2597, PETRI_PLACES=1226, PETRI_TRANSITIONS=1129} [2022-11-20 11:46:56,691 INFO L288 CegarLoopForPetriNet]: 1201 programPoint places, 25 predicate places. [2022-11-20 11:46:56,691 INFO L495 AbstractCegarLoop]: Abstraction has has 1226 places, 1129 transitions, 2597 flow [2022-11-20 11:46:56,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1076.611111111111) internal successors, (19379), 18 states have internal predecessors, (19379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:56,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:46:56,693 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:56,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-11-20 11:46:56,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:56,894 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:46:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1673621109, now seen corresponding path program 1 times [2022-11-20 11:46:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:56,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184582816] [2022-11-20 11:46:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:56,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:57,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:57,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184582816] [2022-11-20 11:46:57,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184582816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:57,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607110749] [2022-11-20 11:46:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:57,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:57,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:57,134 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:57,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-11-20 11:46:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:58,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:46:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:58,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:59,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607110749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:59,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:59,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:46:59,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731799253] [2022-11-20 11:46:59,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:59,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:46:59,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:59,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:46:59,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:46:59,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1074 out of 1360 [2022-11-20 11:46:59,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1226 places, 1129 transitions, 2597 flow. Second operand has 34 states, 34 states have (on average 1076.7941176470588) internal successors, (36611), 34 states have internal predecessors, (36611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:59,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:46:59,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1074 of 1360 [2022-11-20 11:46:59,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:02,080 INFO L130 PetriNetUnfolder]: 0/1767 cut-off events. [2022-11-20 11:47:02,080 INFO L131 PetriNetUnfolder]: For 924/924 co-relation queries the response was YES. [2022-11-20 11:47:02,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 1767 events. 0/1767 cut-off events. For 924/924 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5824 event pairs, 0 based on Foata normal form. 8/1775 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-11-20 11:47:02,085 INFO L137 encePairwiseOnDemand]: 1354/1360 looper letters, 73 selfloop transitions, 45 changer transitions 0/1180 dead transitions. [2022-11-20 11:47:02,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1270 places, 1180 transitions, 3149 flow [2022-11-20 11:47:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:47:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:47:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48456 transitions. [2022-11-20 11:47:02,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7917647058823529 [2022-11-20 11:47:02,110 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 48456 transitions. [2022-11-20 11:47:02,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 48456 transitions. [2022-11-20 11:47:02,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:02,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 48456 transitions. [2022-11-20 11:47:02,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1076.8) internal successors, (48456), 45 states have internal predecessors, (48456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:02,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1360.0) internal successors, (62560), 46 states have internal predecessors, (62560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:02,197 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1360.0) internal successors, (62560), 46 states have internal predecessors, (62560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:02,197 INFO L175 Difference]: Start difference. First operand has 1226 places, 1129 transitions, 2597 flow. Second operand 45 states and 48456 transitions. [2022-11-20 11:47:02,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1270 places, 1180 transitions, 3149 flow [2022-11-20 11:47:02,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1264 places, 1180 transitions, 3109 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:47:02,228 INFO L231 Difference]: Finished difference. Result has 1273 places, 1154 transitions, 2875 flow [2022-11-20 11:47:02,229 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=1220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2875, PETRI_PLACES=1273, PETRI_TRANSITIONS=1154} [2022-11-20 11:47:02,229 INFO L288 CegarLoopForPetriNet]: 1201 programPoint places, 72 predicate places. [2022-11-20 11:47:02,229 INFO L495 AbstractCegarLoop]: Abstraction has has 1273 places, 1154 transitions, 2875 flow [2022-11-20 11:47:02,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1076.7941176470588) internal successors, (36611), 34 states have internal predecessors, (36611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:02,234 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:02,235 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:02,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-11-20 11:47:02,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:02,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:02,435 INFO L85 PathProgramCache]: Analyzing trace with hash -355099993, now seen corresponding path program 1 times [2022-11-20 11:47:02,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:02,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85289898] [2022-11-20 11:47:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:02,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:03,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:03,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85289898] [2022-11-20 11:47:03,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85289898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:03,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052068075] [2022-11-20 11:47:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:03,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:03,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:03,075 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:03,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-11-20 11:47:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:04,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:47:04,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:04,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:05,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052068075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:05,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:47:05,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:47:05,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279804929] [2022-11-20 11:47:05,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:05,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:47:05,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:47:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:47:06,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1074 out of 1360 [2022-11-20 11:47:06,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1273 places, 1154 transitions, 2875 flow. Second operand has 66 states, 66 states have (on average 1076.8939393939395) internal successors, (71075), 66 states have internal predecessors, (71075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:06,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:06,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1074 of 1360 [2022-11-20 11:47:06,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:10,004 INFO L130 PetriNetUnfolder]: 0/1559 cut-off events. [2022-11-20 11:47:10,005 INFO L131 PetriNetUnfolder]: For 3192/3192 co-relation queries the response was YES. [2022-11-20 11:47:10,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 1559 events. 0/1559 cut-off events. For 3192/3192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4455 event pairs, 0 based on Foata normal form. 16/1575 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2022-11-20 11:47:10,008 INFO L137 encePairwiseOnDemand]: 1354/1360 looper letters, 105 selfloop transitions, 93 changer transitions 0/1260 dead transitions. [2022-11-20 11:47:10,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1365 places, 1260 transitions, 4119 flow [2022-11-20 11:47:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:47:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:47:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100096 transitions. [2022-11-20 11:47:10,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913978494623656 [2022-11-20 11:47:10,050 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 100096 transitions. [2022-11-20 11:47:10,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 100096 transitions. [2022-11-20 11:47:10,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:10,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 100096 transitions. [2022-11-20 11:47:10,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1076.3010752688172) internal successors, (100096), 93 states have internal predecessors, (100096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:10,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1360.0) internal successors, (127840), 94 states have internal predecessors, (127840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:10,189 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1360.0) internal successors, (127840), 94 states have internal predecessors, (127840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:10,189 INFO L175 Difference]: Start difference. First operand has 1273 places, 1154 transitions, 2875 flow. Second operand 93 states and 100096 transitions. [2022-11-20 11:47:10,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1365 places, 1260 transitions, 4119 flow [2022-11-20 11:47:10,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1347 places, 1260 transitions, 4031 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:47:10,234 INFO L231 Difference]: Finished difference. Result has 1364 places, 1203 transitions, 3509 flow [2022-11-20 11:47:10,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=1255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3509, PETRI_PLACES=1364, PETRI_TRANSITIONS=1203} [2022-11-20 11:47:10,236 INFO L288 CegarLoopForPetriNet]: 1201 programPoint places, 163 predicate places. [2022-11-20 11:47:10,236 INFO L495 AbstractCegarLoop]: Abstraction has has 1364 places, 1203 transitions, 3509 flow [2022-11-20 11:47:10,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1076.8939393939395) internal successors, (71075), 66 states have internal predecessors, (71075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:10,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:10,247 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:10,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-11-20 11:47:10,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:10,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:10,461 INFO L85 PathProgramCache]: Analyzing trace with hash 326102431, now seen corresponding path program 1 times [2022-11-20 11:47:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:10,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667684505] [2022-11-20 11:47:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:10,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:13,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:13,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667684505] [2022-11-20 11:47:13,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667684505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:13,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489192033] [2022-11-20 11:47:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:13,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:13,019 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:13,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-11-20 11:47:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:47:14,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:15,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:18,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489192033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:18,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:47:18,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:47:18,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397270464] [2022-11-20 11:47:18,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:18,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:47:18,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:47:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:47:18,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1074 out of 1360 [2022-11-20 11:47:19,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1364 places, 1203 transitions, 3509 flow. Second operand has 130 states, 130 states have (on average 1076.946153846154) internal successors, (140003), 130 states have internal predecessors, (140003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:19,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:19,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1074 of 1360 [2022-11-20 11:47:19,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:24,281 INFO L130 PetriNetUnfolder]: 0/1442 cut-off events. [2022-11-20 11:47:24,281 INFO L131 PetriNetUnfolder]: For 5171/5171 co-relation queries the response was YES. [2022-11-20 11:47:24,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 1442 events. 0/1442 cut-off events. For 5171/5171 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3717 event pairs, 0 based on Foata normal form. 9/1451 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2022-11-20 11:47:24,283 INFO L137 encePairwiseOnDemand]: 1355/1360 looper letters, 120 selfloop transitions, 118 changer transitions 0/1288 dead transitions. [2022-11-20 11:47:24,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1470 places, 1288 transitions, 4747 flow [2022-11-20 11:47:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-20 11:47:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2022-11-20 11:47:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129127 transitions. [2022-11-20 11:47:24,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912193627450981 [2022-11-20 11:47:24,333 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 129127 transitions. [2022-11-20 11:47:24,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 129127 transitions. [2022-11-20 11:47:24,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:24,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 129127 transitions. [2022-11-20 11:47:24,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 1076.0583333333334) internal successors, (129127), 120 states have internal predecessors, (129127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:24,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 1360.0) internal successors, (164560), 121 states have internal predecessors, (164560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:24,519 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 1360.0) internal successors, (164560), 121 states have internal predecessors, (164560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:24,519 INFO L175 Difference]: Start difference. First operand has 1364 places, 1203 transitions, 3509 flow. Second operand 120 states and 129127 transitions. [2022-11-20 11:47:24,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1470 places, 1288 transitions, 4747 flow [2022-11-20 11:47:24,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1397 places, 1288 transitions, 4345 flow, removed 26 selfloop flow, removed 73 redundant places. [2022-11-20 11:47:24,554 INFO L231 Difference]: Finished difference. Result has 1397 places, 1214 transitions, 3621 flow [2022-11-20 11:47:24,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1360, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=1278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=3621, PETRI_PLACES=1397, PETRI_TRANSITIONS=1214} [2022-11-20 11:47:24,554 INFO L288 CegarLoopForPetriNet]: 1201 programPoint places, 196 predicate places. [2022-11-20 11:47:24,555 INFO L495 AbstractCegarLoop]: Abstraction has has 1397 places, 1214 transitions, 3621 flow [2022-11-20 11:47:24,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1076.946153846154) internal successors, (140003), 130 states have internal predecessors, (140003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:24,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:24,569 INFO L209 CegarLoopForPetriNet]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:24,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-11-20 11:47:24,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2022-11-20 11:47:24,770 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:24,770 INFO L85 PathProgramCache]: Analyzing trace with hash -481461553, now seen corresponding path program 1 times [2022-11-20 11:47:24,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:24,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136852058] [2022-11-20 11:47:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:24,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:47:24,843 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:47:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:47:24,994 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:47:24,995 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:47:24,995 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:47:24,995 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:47:24,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2022-11-20 11:47:24,995 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:24,996 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:47:24,996 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2022-11-20 11:47:25,091 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:47:25,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1230 places, 1393 transitions, 4546 flow [2022-11-20 11:47:27,715 INFO L130 PetriNetUnfolder]: 404/2948 cut-off events. [2022-11-20 11:47:27,715 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2022-11-20 11:47:27,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3889 conditions, 2948 events. 404/2948 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 11227 event pairs, 0 based on Foata normal form. 0/2462 useless extension candidates. Maximal degree in co-relation 3746. Up to 82 conditions per place. [2022-11-20 11:47:27,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 1230 places, 1393 transitions, 4546 flow [2022-11-20 11:47:28,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1230 places, 1393 transitions, 4546 flow [2022-11-20 11:47:28,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:47:28,042 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:47:28,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:47:28,049 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:47:28,049 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:47:28,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:28,050 INFO L209 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] [2022-11-20 11:47:28,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2111305786, now seen corresponding path program 1 times [2022-11-20 11:47:28,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:28,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394822394] [2022-11-20 11:47:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:28,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:28,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394822394] [2022-11-20 11:47:28,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394822394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:47:28,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:47:28,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:47:28,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106368025] [2022-11-20 11:47:28,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:47:28,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:47:28,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:28,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:47:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:47:28,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1108 out of 1393 [2022-11-20 11:47:28,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1230 places, 1393 transitions, 4546 flow. Second operand has 2 states, 2 states have (on average 1108.5) internal successors, (2217), 2 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:28,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:28,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1108 of 1393 [2022-11-20 11:47:28,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:30,799 INFO L130 PetriNetUnfolder]: 0/2503 cut-off events. [2022-11-20 11:47:30,799 INFO L131 PetriNetUnfolder]: For 12260/12260 co-relation queries the response was YES. [2022-11-20 11:47:30,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3485 conditions, 2503 events. 0/2503 cut-off events. For 12260/12260 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 10650 event pairs, 0 based on Foata normal form. 4852/7273 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-11-20 11:47:30,804 INFO L137 encePairwiseOnDemand]: 1149/1393 looper letters, 40 selfloop transitions, 0 changer transitions 12/1148 dead transitions. [2022-11-20 11:47:30,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1230 places, 1148 transitions, 4136 flow [2022-11-20 11:47:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:47:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:47:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2500 transitions. [2022-11-20 11:47:30,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8973438621679828 [2022-11-20 11:47:30,807 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2500 transitions. [2022-11-20 11:47:30,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2500 transitions. [2022-11-20 11:47:30,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:30,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2500 transitions. [2022-11-20 11:47:30,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1250.0) internal successors, (2500), 2 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:30,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1393.0) internal successors, (4179), 3 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:30,811 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1393.0) internal successors, (4179), 3 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:30,811 INFO L175 Difference]: Start difference. First operand has 1230 places, 1393 transitions, 4546 flow. Second operand 2 states and 2500 transitions. [2022-11-20 11:47:30,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1230 places, 1148 transitions, 4136 flow [2022-11-20 11:47:30,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1230 places, 1148 transitions, 2576 flow, removed 780 selfloop flow, removed 0 redundant places. [2022-11-20 11:47:30,835 INFO L231 Difference]: Finished difference. Result has 1230 places, 1136 transitions, 2472 flow [2022-11-20 11:47:30,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1393, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=1229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2472, PETRI_PLACES=1230, PETRI_TRANSITIONS=1136} [2022-11-20 11:47:30,836 INFO L288 CegarLoopForPetriNet]: 1230 programPoint places, 0 predicate places. [2022-11-20 11:47:30,836 INFO L495 AbstractCegarLoop]: Abstraction has has 1230 places, 1136 transitions, 2472 flow [2022-11-20 11:47:30,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1108.5) internal successors, (2217), 2 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:30,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:30,837 INFO L209 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] [2022-11-20 11:47:30,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2022-11-20 11:47:30,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1890258503, now seen corresponding path program 1 times [2022-11-20 11:47:30,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:30,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988091896] [2022-11-20 11:47:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:30,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:30,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:30,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988091896] [2022-11-20 11:47:30,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988091896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:47:30,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:47:30,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:47:30,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560435827] [2022-11-20 11:47:30,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:47:30,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:47:30,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:30,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:47:30,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:47:30,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1101 out of 1393 [2022-11-20 11:47:30,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1230 places, 1136 transitions, 2472 flow. Second operand has 3 states, 3 states have (on average 1102.0) internal successors, (3306), 3 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:30,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:30,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1101 of 1393 [2022-11-20 11:47:30,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:32,749 INFO L130 PetriNetUnfolder]: 0/1998 cut-off events. [2022-11-20 11:47:32,749 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-11-20 11:47:32,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2405 conditions, 1998 events. 0/1998 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7175 event pairs, 0 based on Foata normal form. 0/1958 useless extension candidates. Maximal degree in co-relation 0. Up to 240 conditions per place. [2022-11-20 11:47:32,754 INFO L137 encePairwiseOnDemand]: 1390/1393 looper letters, 49 selfloop transitions, 2 changer transitions 0/1140 dead transitions. [2022-11-20 11:47:32,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1220 places, 1140 transitions, 2582 flow [2022-11-20 11:47:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:47:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:47:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3355 transitions. [2022-11-20 11:47:32,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8028236420196219 [2022-11-20 11:47:32,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3355 transitions. [2022-11-20 11:47:32,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3355 transitions. [2022-11-20 11:47:32,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:32,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3355 transitions. [2022-11-20 11:47:32,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1118.3333333333333) internal successors, (3355), 3 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:32,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1393.0) internal successors, (5572), 4 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:32,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1393.0) internal successors, (5572), 4 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:32,762 INFO L175 Difference]: Start difference. First operand has 1230 places, 1136 transitions, 2472 flow. Second operand 3 states and 3355 transitions. [2022-11-20 11:47:32,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1220 places, 1140 transitions, 2582 flow [2022-11-20 11:47:32,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1220 places, 1140 transitions, 2582 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:47:32,773 INFO L231 Difference]: Finished difference. Result has 1221 places, 1137 transitions, 2484 flow [2022-11-20 11:47:32,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1393, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=1218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2484, PETRI_PLACES=1221, PETRI_TRANSITIONS=1137} [2022-11-20 11:47:32,773 INFO L288 CegarLoopForPetriNet]: 1230 programPoint places, -9 predicate places. [2022-11-20 11:47:32,774 INFO L495 AbstractCegarLoop]: Abstraction has has 1221 places, 1137 transitions, 2484 flow [2022-11-20 11:47:32,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1102.0) internal successors, (3306), 3 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:32,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:32,774 INFO L209 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] [2022-11-20 11:47:32,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2022-11-20 11:47:32,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:32,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2065520256, now seen corresponding path program 1 times [2022-11-20 11:47:32,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:32,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740858474] [2022-11-20 11:47:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:32,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:32,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:32,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740858474] [2022-11-20 11:47:32,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740858474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:32,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839916251] [2022-11-20 11:47:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:32,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:32,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:32,828 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:32,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-11-20 11:47:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:34,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:47:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:34,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:34,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839916251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:34,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:47:34,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:47:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494534411] [2022-11-20 11:47:34,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:34,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:47:34,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:47:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:47:34,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1100 out of 1393 [2022-11-20 11:47:34,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1221 places, 1137 transitions, 2484 flow. Second operand has 10 states, 10 states have (on average 1102.3) internal successors, (11023), 10 states have internal predecessors, (11023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:34,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:34,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1100 of 1393 [2022-11-20 11:47:34,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:37,057 INFO L130 PetriNetUnfolder]: 0/1972 cut-off events. [2022-11-20 11:47:37,057 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-20 11:47:37,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2499 conditions, 1972 events. 0/1972 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7044 event pairs, 0 based on Foata normal form. 2/1974 useless extension candidates. Maximal degree in co-relation 0. Up to 155 conditions per place. [2022-11-20 11:47:37,062 INFO L137 encePairwiseOnDemand]: 1387/1393 looper letters, 50 selfloop transitions, 9 changer transitions 0/1147 dead transitions. [2022-11-20 11:47:37,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1229 places, 1147 transitions, 2624 flow [2022-11-20 11:47:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:47:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:47:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9961 transitions. [2022-11-20 11:47:37,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7945281965382468 [2022-11-20 11:47:37,247 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9961 transitions. [2022-11-20 11:47:37,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9961 transitions. [2022-11-20 11:47:37,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:37,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9961 transitions. [2022-11-20 11:47:37,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1106.7777777777778) internal successors, (9961), 9 states have internal predecessors, (9961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:37,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1393.0) internal successors, (13930), 10 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:37,263 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1393.0) internal successors, (13930), 10 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:37,263 INFO L175 Difference]: Start difference. First operand has 1221 places, 1137 transitions, 2484 flow. Second operand 9 states and 9961 transitions. [2022-11-20 11:47:37,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1229 places, 1147 transitions, 2624 flow [2022-11-20 11:47:37,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1228 places, 1147 transitions, 2622 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:47:37,274 INFO L231 Difference]: Finished difference. Result has 1231 places, 1143 transitions, 2532 flow [2022-11-20 11:47:37,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1393, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=1220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2532, PETRI_PLACES=1231, PETRI_TRANSITIONS=1143} [2022-11-20 11:47:37,274 INFO L288 CegarLoopForPetriNet]: 1230 programPoint places, 1 predicate places. [2022-11-20 11:47:37,275 INFO L495 AbstractCegarLoop]: Abstraction has has 1231 places, 1143 transitions, 2532 flow [2022-11-20 11:47:37,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1102.3) internal successors, (11023), 10 states have internal predecessors, (11023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:37,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:37,276 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:37,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-11-20 11:47:37,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-11-20 11:47:37,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:37,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1584415179, now seen corresponding path program 1 times [2022-11-20 11:47:37,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:37,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780030806] [2022-11-20 11:47:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:37,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:37,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:37,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780030806] [2022-11-20 11:47:37,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780030806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:37,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822727878] [2022-11-20 11:47:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:37,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:37,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:37,569 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:37,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-11-20 11:47:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:39,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:47:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:39,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:39,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822727878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:39,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:47:39,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:47:39,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067368071] [2022-11-20 11:47:39,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:39,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:47:39,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:39,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:47:39,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:47:39,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1100 out of 1393 [2022-11-20 11:47:39,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1231 places, 1143 transitions, 2532 flow. Second operand has 18 states, 18 states have (on average 1102.611111111111) internal successors, (19847), 18 states have internal predecessors, (19847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:39,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:39,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1100 of 1393 [2022-11-20 11:47:39,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:42,172 INFO L130 PetriNetUnfolder]: 0/1920 cut-off events. [2022-11-20 11:47:42,173 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2022-11-20 11:47:42,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 1920 events. 0/1920 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6689 event pairs, 0 based on Foata normal form. 4/1924 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2022-11-20 11:47:42,177 INFO L137 encePairwiseOnDemand]: 1387/1393 looper letters, 58 selfloop transitions, 21 changer transitions 0/1167 dead transitions. [2022-11-20 11:47:42,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1251 places, 1167 transitions, 2798 flow [2022-11-20 11:47:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:47:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:47:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23183 transitions. [2022-11-20 11:47:42,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7924999145386797 [2022-11-20 11:47:42,190 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 23183 transitions. [2022-11-20 11:47:42,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 23183 transitions. [2022-11-20 11:47:42,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:42,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 23183 transitions. [2022-11-20 11:47:42,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1103.952380952381) internal successors, (23183), 21 states have internal predecessors, (23183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:42,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1393.0) internal successors, (30646), 22 states have internal predecessors, (30646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:42,229 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1393.0) internal successors, (30646), 22 states have internal predecessors, (30646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:42,229 INFO L175 Difference]: Start difference. First operand has 1231 places, 1143 transitions, 2532 flow. Second operand 21 states and 23183 transitions. [2022-11-20 11:47:42,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1251 places, 1167 transitions, 2798 flow [2022-11-20 11:47:42,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1250 places, 1167 transitions, 2784 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:47:42,243 INFO L231 Difference]: Finished difference. Result has 1255 places, 1156 transitions, 2656 flow [2022-11-20 11:47:42,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1393, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=1230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2656, PETRI_PLACES=1255, PETRI_TRANSITIONS=1156} [2022-11-20 11:47:42,244 INFO L288 CegarLoopForPetriNet]: 1230 programPoint places, 25 predicate places. [2022-11-20 11:47:42,244 INFO L495 AbstractCegarLoop]: Abstraction has has 1255 places, 1156 transitions, 2656 flow [2022-11-20 11:47:42,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1102.611111111111) internal successors, (19847), 18 states have internal predecessors, (19847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:42,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:42,246 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:42,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-11-20 11:47:42,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-11-20 11:47:42,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:42,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:42,446 INFO L85 PathProgramCache]: Analyzing trace with hash 173415851, now seen corresponding path program 1 times [2022-11-20 11:47:42,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:42,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189833483] [2022-11-20 11:47:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:42,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:42,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189833483] [2022-11-20 11:47:42,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189833483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920299734] [2022-11-20 11:47:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:42,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:42,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:42,658 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:42,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-11-20 11:47:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:47:44,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:44,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:44,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920299734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:44,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:47:44,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:47:44,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767064194] [2022-11-20 11:47:44,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:44,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:47:44,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:47:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:47:44,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1100 out of 1393 [2022-11-20 11:47:44,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1255 places, 1156 transitions, 2656 flow. Second operand has 34 states, 34 states have (on average 1102.7941176470588) internal successors, (37495), 34 states have internal predecessors, (37495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:44,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:44,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1100 of 1393 [2022-11-20 11:47:44,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:47,656 INFO L130 PetriNetUnfolder]: 0/1816 cut-off events. [2022-11-20 11:47:47,656 INFO L131 PetriNetUnfolder]: For 951/951 co-relation queries the response was YES. [2022-11-20 11:47:47,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2912 conditions, 1816 events. 0/1816 cut-off events. For 951/951 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6004 event pairs, 0 based on Foata normal form. 8/1824 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-11-20 11:47:47,660 INFO L137 encePairwiseOnDemand]: 1387/1393 looper letters, 74 selfloop transitions, 45 changer transitions 0/1207 dead transitions. [2022-11-20 11:47:47,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1299 places, 1207 transitions, 3210 flow [2022-11-20 11:47:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:47:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:47:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49627 transitions. [2022-11-20 11:47:47,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791688601738853 [2022-11-20 11:47:47,681 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 49627 transitions. [2022-11-20 11:47:47,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 49627 transitions. [2022-11-20 11:47:47,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:47,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 49627 transitions. [2022-11-20 11:47:47,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1102.8222222222223) internal successors, (49627), 45 states have internal predecessors, (49627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:47,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1393.0) internal successors, (64078), 46 states have internal predecessors, (64078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:47,752 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1393.0) internal successors, (64078), 46 states have internal predecessors, (64078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:47,752 INFO L175 Difference]: Start difference. First operand has 1255 places, 1156 transitions, 2656 flow. Second operand 45 states and 49627 transitions. [2022-11-20 11:47:47,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1299 places, 1207 transitions, 3210 flow [2022-11-20 11:47:47,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1293 places, 1207 transitions, 3170 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:47:47,771 INFO L231 Difference]: Finished difference. Result has 1302 places, 1181 transitions, 2934 flow [2022-11-20 11:47:47,771 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1393, PETRI_DIFFERENCE_MINUEND_FLOW=2632, PETRI_DIFFERENCE_MINUEND_PLACES=1249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2934, PETRI_PLACES=1302, PETRI_TRANSITIONS=1181} [2022-11-20 11:47:47,772 INFO L288 CegarLoopForPetriNet]: 1230 programPoint places, 72 predicate places. [2022-11-20 11:47:47,772 INFO L495 AbstractCegarLoop]: Abstraction has has 1302 places, 1181 transitions, 2934 flow [2022-11-20 11:47:47,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1102.7941176470588) internal successors, (37495), 34 states have internal predecessors, (37495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:47,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:47,775 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:47,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-11-20 11:47:47,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-11-20 11:47:47,976 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash 663362759, now seen corresponding path program 1 times [2022-11-20 11:47:47,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:47,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903049798] [2022-11-20 11:47:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:47,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:48,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:48,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903049798] [2022-11-20 11:47:48,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903049798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:48,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247400250] [2022-11-20 11:47:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:48,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:48,626 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:48,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-11-20 11:47:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:50,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:47:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:50,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:47:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:51,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247400250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:51,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:47:51,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:47:51,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260702573] [2022-11-20 11:47:51,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:51,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:47:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:51,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:47:51,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:47:51,634 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1100 out of 1393 [2022-11-20 11:47:51,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1302 places, 1181 transitions, 2934 flow. Second operand has 66 states, 66 states have (on average 1102.8939393939395) internal successors, (72791), 66 states have internal predecessors, (72791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:51,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:47:51,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1100 of 1393 [2022-11-20 11:47:51,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:47:55,691 INFO L130 PetriNetUnfolder]: 0/1608 cut-off events. [2022-11-20 11:47:55,691 INFO L131 PetriNetUnfolder]: For 3313/3313 co-relation queries the response was YES. [2022-11-20 11:47:55,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2835 conditions, 1608 events. 0/1608 cut-off events. For 3313/3313 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4639 event pairs, 0 based on Foata normal form. 16/1624 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2022-11-20 11:47:55,695 INFO L137 encePairwiseOnDemand]: 1387/1393 looper letters, 106 selfloop transitions, 93 changer transitions 0/1287 dead transitions. [2022-11-20 11:47:55,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1394 places, 1287 transitions, 4180 flow [2022-11-20 11:47:55,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:47:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:47:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102515 transitions. [2022-11-20 11:47:55,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913222024098989 [2022-11-20 11:47:55,737 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 102515 transitions. [2022-11-20 11:47:55,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 102515 transitions. [2022-11-20 11:47:55,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:47:55,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 102515 transitions. [2022-11-20 11:47:55,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1102.3118279569892) internal successors, (102515), 93 states have internal predecessors, (102515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:55,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1393.0) internal successors, (130942), 94 states have internal predecessors, (130942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:55,884 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1393.0) internal successors, (130942), 94 states have internal predecessors, (130942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:55,884 INFO L175 Difference]: Start difference. First operand has 1302 places, 1181 transitions, 2934 flow. Second operand 93 states and 102515 transitions. [2022-11-20 11:47:55,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1394 places, 1287 transitions, 4180 flow [2022-11-20 11:47:55,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1376 places, 1287 transitions, 4092 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:47:55,913 INFO L231 Difference]: Finished difference. Result has 1393 places, 1230 transitions, 3568 flow [2022-11-20 11:47:55,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1393, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=1284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3568, PETRI_PLACES=1393, PETRI_TRANSITIONS=1230} [2022-11-20 11:47:55,914 INFO L288 CegarLoopForPetriNet]: 1230 programPoint places, 163 predicate places. [2022-11-20 11:47:55,914 INFO L495 AbstractCegarLoop]: Abstraction has has 1393 places, 1230 transitions, 3568 flow [2022-11-20 11:47:55,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1102.8939393939395) internal successors, (72791), 66 states have internal predecessors, (72791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:55,922 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:47:55,922 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:55,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-11-20 11:47:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-11-20 11:47:56,123 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:47:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 122313663, now seen corresponding path program 1 times [2022-11-20 11:47:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:56,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154434319] [2022-11-20 11:47:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:58,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:58,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154434319] [2022-11-20 11:47:58,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154434319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:58,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453942289] [2022-11-20 11:47:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:58,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:58,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:58,637 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:58,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-11-20 11:48:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:00,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:48:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:00,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:04,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453942289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:04,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:04,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:48:04,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622599914] [2022-11-20 11:48:04,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:04,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:48:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:04,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:48:04,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:48:04,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1100 out of 1393 [2022-11-20 11:48:04,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1393 places, 1230 transitions, 3568 flow. Second operand has 130 states, 130 states have (on average 1102.946153846154) internal successors, (143383), 130 states have internal predecessors, (143383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:04,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:04,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1100 of 1393 [2022-11-20 11:48:04,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:48:10,677 INFO L130 PetriNetUnfolder]: 0/1478 cut-off events. [2022-11-20 11:48:10,678 INFO L131 PetriNetUnfolder]: For 5668/5668 co-relation queries the response was YES. [2022-11-20 11:48:10,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1478 events. 0/1478 cut-off events. For 5668/5668 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3815 event pairs, 0 based on Foata normal form. 10/1488 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2022-11-20 11:48:10,679 INFO L137 encePairwiseOnDemand]: 1388/1393 looper letters, 123 selfloop transitions, 121 changer transitions 0/1320 dead transitions. [2022-11-20 11:48:10,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1502 places, 1320 transitions, 4872 flow [2022-11-20 11:48:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-20 11:48:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2022-11-20 11:48:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135554 transitions. [2022-11-20 11:48:10,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911450399500406 [2022-11-20 11:48:10,745 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 135554 transitions. [2022-11-20 11:48:10,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 135554 transitions. [2022-11-20 11:48:10,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:10,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 135554 transitions. [2022-11-20 11:48:10,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 1102.0650406504064) internal successors, (135554), 123 states have internal predecessors, (135554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:10,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 1393.0) internal successors, (172732), 124 states have internal predecessors, (172732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:10,956 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 1393.0) internal successors, (172732), 124 states have internal predecessors, (172732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:10,956 INFO L175 Difference]: Start difference. First operand has 1393 places, 1230 transitions, 3568 flow. Second operand 123 states and 135554 transitions. [2022-11-20 11:48:10,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1502 places, 1320 transitions, 4872 flow [2022-11-20 11:48:10,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1429 places, 1320 transitions, 4460 flow, removed 27 selfloop flow, removed 73 redundant places. [2022-11-20 11:48:10,979 INFO L231 Difference]: Finished difference. Result has 1429 places, 1244 transitions, 3714 flow [2022-11-20 11:48:10,980 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1393, PETRI_DIFFERENCE_MINUEND_FLOW=3220, PETRI_DIFFERENCE_MINUEND_PLACES=1307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=3714, PETRI_PLACES=1429, PETRI_TRANSITIONS=1244} [2022-11-20 11:48:10,980 INFO L288 CegarLoopForPetriNet]: 1230 programPoint places, 199 predicate places. [2022-11-20 11:48:10,980 INFO L495 AbstractCegarLoop]: Abstraction has has 1429 places, 1244 transitions, 3714 flow [2022-11-20 11:48:10,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1102.946153846154) internal successors, (143383), 130 states have internal predecessors, (143383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:10,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:10,992 INFO L209 CegarLoopForPetriNet]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:11,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-11-20 11:48:11,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:11,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:11,193 INFO L85 PathProgramCache]: Analyzing trace with hash 126450991, now seen corresponding path program 1 times [2022-11-20 11:48:11,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:11,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485382346] [2022-11-20 11:48:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:11,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:48:11,264 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:48:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:48:11,434 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:48:11,435 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:48:11,435 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:48:11,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:48:11,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2022-11-20 11:48:11,435 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:11,435 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:48:11,435 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2022-11-20 11:48:11,555 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:48:11,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1259 places, 1426 transitions, 4697 flow [2022-11-20 11:48:14,456 INFO L130 PetriNetUnfolder]: 414/3020 cut-off events. [2022-11-20 11:48:14,456 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2022-11-20 11:48:14,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4005 conditions, 3020 events. 414/3020 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 11474 event pairs, 0 based on Foata normal form. 0/2522 useless extension candidates. Maximal degree in co-relation 3861. Up to 84 conditions per place. [2022-11-20 11:48:14,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 1259 places, 1426 transitions, 4697 flow [2022-11-20 11:48:14,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1259 places, 1426 transitions, 4697 flow [2022-11-20 11:48:14,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:48:14,831 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:48:14,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:48:14,836 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:48:14,836 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:48:14,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:14,836 INFO L209 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] [2022-11-20 11:48:14,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:14,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1952365446, now seen corresponding path program 1 times [2022-11-20 11:48:14,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:14,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842691415] [2022-11-20 11:48:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:14,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:14,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842691415] [2022-11-20 11:48:14,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842691415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:14,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:14,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:48:14,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440251374] [2022-11-20 11:48:14,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:14,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:48:14,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:14,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:48:14,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:48:14,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1134 out of 1426 [2022-11-20 11:48:14,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1259 places, 1426 transitions, 4697 flow. Second operand has 2 states, 2 states have (on average 1134.5) internal successors, (2269), 2 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:14,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:14,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1134 of 1426 [2022-11-20 11:48:14,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:48:17,139 INFO L130 PetriNetUnfolder]: 0/2564 cut-off events. [2022-11-20 11:48:17,139 INFO L131 PetriNetUnfolder]: For 13161/13161 co-relation queries the response was YES. [2022-11-20 11:48:17,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 2564 events. 0/2564 cut-off events. For 13161/13161 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 10920 event pairs, 0 based on Foata normal form. 5096/7576 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-20 11:48:17,144 INFO L137 encePairwiseOnDemand]: 1176/1426 looper letters, 41 selfloop transitions, 0 changer transitions 12/1175 dead transitions. [2022-11-20 11:48:17,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1259 places, 1175 transitions, 4277 flow [2022-11-20 11:48:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:48:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:48:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2559 transitions. [2022-11-20 11:48:17,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.89726507713885 [2022-11-20 11:48:17,147 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2559 transitions. [2022-11-20 11:48:17,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2559 transitions. [2022-11-20 11:48:17,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:17,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2559 transitions. [2022-11-20 11:48:17,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1279.5) internal successors, (2559), 2 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:17,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1426.0) internal successors, (4278), 3 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:17,150 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1426.0) internal successors, (4278), 3 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:17,150 INFO L175 Difference]: Start difference. First operand has 1259 places, 1426 transitions, 4697 flow. Second operand 2 states and 2559 transitions. [2022-11-20 11:48:17,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1259 places, 1175 transitions, 4277 flow [2022-11-20 11:48:17,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1259 places, 1175 transitions, 2637 flow, removed 820 selfloop flow, removed 0 redundant places. [2022-11-20 11:48:17,182 INFO L231 Difference]: Finished difference. Result has 1259 places, 1163 transitions, 2531 flow [2022-11-20 11:48:17,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1426, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=1258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2531, PETRI_PLACES=1259, PETRI_TRANSITIONS=1163} [2022-11-20 11:48:17,182 INFO L288 CegarLoopForPetriNet]: 1259 programPoint places, 0 predicate places. [2022-11-20 11:48:17,183 INFO L495 AbstractCegarLoop]: Abstraction has has 1259 places, 1163 transitions, 2531 flow [2022-11-20 11:48:17,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1134.5) internal successors, (2269), 2 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:17,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:17,183 INFO L209 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] [2022-11-20 11:48:17,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2022-11-20 11:48:17,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1658962439, now seen corresponding path program 1 times [2022-11-20 11:48:17,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:17,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772337766] [2022-11-20 11:48:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:17,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:17,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:17,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772337766] [2022-11-20 11:48:17,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772337766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:17,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:17,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:48:17,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805966023] [2022-11-20 11:48:17,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:17,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:48:17,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:48:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:48:17,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1127 out of 1426 [2022-11-20 11:48:17,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1259 places, 1163 transitions, 2531 flow. Second operand has 3 states, 3 states have (on average 1128.0) internal successors, (3384), 3 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:17,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:17,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1127 of 1426 [2022-11-20 11:48:17,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:48:19,456 INFO L130 PetriNetUnfolder]: 0/2047 cut-off events. [2022-11-20 11:48:19,457 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-20 11:48:19,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 2047 events. 0/2047 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7358 event pairs, 0 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 0. Up to 246 conditions per place. [2022-11-20 11:48:19,462 INFO L137 encePairwiseOnDemand]: 1423/1426 looper letters, 50 selfloop transitions, 2 changer transitions 0/1167 dead transitions. [2022-11-20 11:48:19,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 1167 transitions, 2643 flow [2022-11-20 11:48:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:48:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:48:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3434 transitions. [2022-11-20 11:48:19,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8027115474520804 [2022-11-20 11:48:19,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3434 transitions. [2022-11-20 11:48:19,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3434 transitions. [2022-11-20 11:48:19,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:19,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3434 transitions. [2022-11-20 11:48:19,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1144.6666666666667) internal successors, (3434), 3 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:19,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1426.0) internal successors, (5704), 4 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:19,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1426.0) internal successors, (5704), 4 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:19,470 INFO L175 Difference]: Start difference. First operand has 1259 places, 1163 transitions, 2531 flow. Second operand 3 states and 3434 transitions. [2022-11-20 11:48:19,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1249 places, 1167 transitions, 2643 flow [2022-11-20 11:48:19,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1249 places, 1167 transitions, 2643 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:48:19,483 INFO L231 Difference]: Finished difference. Result has 1250 places, 1164 transitions, 2543 flow [2022-11-20 11:48:19,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1426, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=1247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2543, PETRI_PLACES=1250, PETRI_TRANSITIONS=1164} [2022-11-20 11:48:19,483 INFO L288 CegarLoopForPetriNet]: 1259 programPoint places, -9 predicate places. [2022-11-20 11:48:19,483 INFO L495 AbstractCegarLoop]: Abstraction has has 1250 places, 1164 transitions, 2543 flow [2022-11-20 11:48:19,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1128.0) internal successors, (3384), 3 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:19,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:19,484 INFO L209 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] [2022-11-20 11:48:19,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2022-11-20 11:48:19,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:19,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1125138272, now seen corresponding path program 1 times [2022-11-20 11:48:19,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:19,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796926566] [2022-11-20 11:48:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:19,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:19,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:19,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796926566] [2022-11-20 11:48:19,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796926566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435739853] [2022-11-20 11:48:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:19,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:19,541 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:19,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-11-20 11:48:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:21,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:48:21,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:21,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:21,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435739853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:21,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:21,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:48:21,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856722865] [2022-11-20 11:48:21,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:21,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:48:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:48:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:48:21,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1126 out of 1426 [2022-11-20 11:48:21,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1250 places, 1164 transitions, 2543 flow. Second operand has 10 states, 10 states have (on average 1128.3) internal successors, (11283), 10 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:21,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:21,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1126 of 1426 [2022-11-20 11:48:21,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:48:23,707 INFO L130 PetriNetUnfolder]: 0/2021 cut-off events. [2022-11-20 11:48:23,707 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-20 11:48:23,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2561 conditions, 2021 events. 0/2021 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7219 event pairs, 0 based on Foata normal form. 2/2023 useless extension candidates. Maximal degree in co-relation 0. Up to 159 conditions per place. [2022-11-20 11:48:23,712 INFO L137 encePairwiseOnDemand]: 1420/1426 looper letters, 51 selfloop transitions, 9 changer transitions 0/1174 dead transitions. [2022-11-20 11:48:23,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1258 places, 1174 transitions, 2685 flow [2022-11-20 11:48:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:48:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:48:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10196 transitions. [2022-11-20 11:48:23,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7944522362474676 [2022-11-20 11:48:23,719 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 10196 transitions. [2022-11-20 11:48:23,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10196 transitions. [2022-11-20 11:48:23,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:23,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 10196 transitions. [2022-11-20 11:48:23,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1132.888888888889) internal successors, (10196), 9 states have internal predecessors, (10196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:23,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1426.0) internal successors, (14260), 10 states have internal predecessors, (14260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:23,735 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1426.0) internal successors, (14260), 10 states have internal predecessors, (14260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:23,735 INFO L175 Difference]: Start difference. First operand has 1250 places, 1164 transitions, 2543 flow. Second operand 9 states and 10196 transitions. [2022-11-20 11:48:23,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1258 places, 1174 transitions, 2685 flow [2022-11-20 11:48:23,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1257 places, 1174 transitions, 2683 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:48:23,748 INFO L231 Difference]: Finished difference. Result has 1260 places, 1170 transitions, 2591 flow [2022-11-20 11:48:23,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1426, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=1249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2591, PETRI_PLACES=1260, PETRI_TRANSITIONS=1170} [2022-11-20 11:48:23,749 INFO L288 CegarLoopForPetriNet]: 1259 programPoint places, 1 predicate places. [2022-11-20 11:48:23,749 INFO L495 AbstractCegarLoop]: Abstraction has has 1260 places, 1170 transitions, 2591 flow [2022-11-20 11:48:23,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1128.3) internal successors, (11283), 10 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:23,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:23,750 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:23,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-11-20 11:48:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:23,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:23,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1912173589, now seen corresponding path program 1 times [2022-11-20 11:48:23,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:23,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480157306] [2022-11-20 11:48:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:24,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:24,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480157306] [2022-11-20 11:48:24,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480157306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:24,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844644181] [2022-11-20 11:48:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:24,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:24,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:24,038 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:24,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-11-20 11:48:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:25,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:48:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:25,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:25,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844644181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:25,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:25,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:48:25,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472386418] [2022-11-20 11:48:25,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:25,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:48:25,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:25,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:48:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:48:26,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1126 out of 1426 [2022-11-20 11:48:26,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1260 places, 1170 transitions, 2591 flow. Second operand has 18 states, 18 states have (on average 1128.611111111111) internal successors, (20315), 18 states have internal predecessors, (20315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:26,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:26,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1126 of 1426 [2022-11-20 11:48:26,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:48:28,642 INFO L130 PetriNetUnfolder]: 0/1969 cut-off events. [2022-11-20 11:48:28,642 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-11-20 11:48:28,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 1969 events. 0/1969 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6878 event pairs, 0 based on Foata normal form. 4/1973 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2022-11-20 11:48:28,646 INFO L137 encePairwiseOnDemand]: 1420/1426 looper letters, 59 selfloop transitions, 21 changer transitions 0/1194 dead transitions. [2022-11-20 11:48:28,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1280 places, 1194 transitions, 2859 flow [2022-11-20 11:48:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:48:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:48:28,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23730 transitions. [2022-11-20 11:48:28,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7924263674614306 [2022-11-20 11:48:28,659 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 23730 transitions. [2022-11-20 11:48:28,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 23730 transitions. [2022-11-20 11:48:28,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:28,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 23730 transitions. [2022-11-20 11:48:28,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1130.0) internal successors, (23730), 21 states have internal predecessors, (23730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:28,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1426.0) internal successors, (31372), 22 states have internal predecessors, (31372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:28,700 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1426.0) internal successors, (31372), 22 states have internal predecessors, (31372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:28,700 INFO L175 Difference]: Start difference. First operand has 1260 places, 1170 transitions, 2591 flow. Second operand 21 states and 23730 transitions. [2022-11-20 11:48:28,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1280 places, 1194 transitions, 2859 flow [2022-11-20 11:48:28,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1279 places, 1194 transitions, 2845 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:48:28,713 INFO L231 Difference]: Finished difference. Result has 1284 places, 1183 transitions, 2715 flow [2022-11-20 11:48:28,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1426, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=1259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2715, PETRI_PLACES=1284, PETRI_TRANSITIONS=1183} [2022-11-20 11:48:28,714 INFO L288 CegarLoopForPetriNet]: 1259 programPoint places, 25 predicate places. [2022-11-20 11:48:28,714 INFO L495 AbstractCegarLoop]: Abstraction has has 1284 places, 1183 transitions, 2715 flow [2022-11-20 11:48:28,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1128.611111111111) internal successors, (20315), 18 states have internal predecessors, (20315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:28,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:28,716 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:28,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-11-20 11:48:28,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:28,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:28,917 INFO L85 PathProgramCache]: Analyzing trace with hash -429887221, now seen corresponding path program 1 times [2022-11-20 11:48:28,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:28,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333466162] [2022-11-20 11:48:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:28,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:29,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:29,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333466162] [2022-11-20 11:48:29,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333466162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:29,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652570410] [2022-11-20 11:48:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:29,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:29,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:29,131 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:29,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-11-20 11:48:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:30,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:48:30,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:31,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:31,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652570410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:31,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:31,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:48:31,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421403547] [2022-11-20 11:48:31,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:31,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:48:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:48:31,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:48:31,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1126 out of 1426 [2022-11-20 11:48:31,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1284 places, 1183 transitions, 2715 flow. Second operand has 34 states, 34 states have (on average 1128.7941176470588) internal successors, (38379), 34 states have internal predecessors, (38379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:31,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:31,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1126 of 1426 [2022-11-20 11:48:31,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:48:34,531 INFO L130 PetriNetUnfolder]: 0/1865 cut-off events. [2022-11-20 11:48:34,531 INFO L131 PetriNetUnfolder]: For 978/978 co-relation queries the response was YES. [2022-11-20 11:48:34,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2991 conditions, 1865 events. 0/1865 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6194 event pairs, 0 based on Foata normal form. 8/1873 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-11-20 11:48:34,536 INFO L137 encePairwiseOnDemand]: 1420/1426 looper letters, 75 selfloop transitions, 45 changer transitions 0/1234 dead transitions. [2022-11-20 11:48:34,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1328 places, 1234 transitions, 3271 flow [2022-11-20 11:48:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:48:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:48:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50798 transitions. [2022-11-20 11:48:34,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916160199470157 [2022-11-20 11:48:34,562 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 50798 transitions. [2022-11-20 11:48:34,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 50798 transitions. [2022-11-20 11:48:34,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:34,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 50798 transitions. [2022-11-20 11:48:34,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1128.8444444444444) internal successors, (50798), 45 states have internal predecessors, (50798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:34,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1426.0) internal successors, (65596), 46 states have internal predecessors, (65596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:34,638 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1426.0) internal successors, (65596), 46 states have internal predecessors, (65596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:34,638 INFO L175 Difference]: Start difference. First operand has 1284 places, 1183 transitions, 2715 flow. Second operand 45 states and 50798 transitions. [2022-11-20 11:48:34,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1328 places, 1234 transitions, 3271 flow [2022-11-20 11:48:34,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1322 places, 1234 transitions, 3231 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:48:34,657 INFO L231 Difference]: Finished difference. Result has 1331 places, 1208 transitions, 2993 flow [2022-11-20 11:48:34,658 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1426, PETRI_DIFFERENCE_MINUEND_FLOW=2691, PETRI_DIFFERENCE_MINUEND_PLACES=1278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2993, PETRI_PLACES=1331, PETRI_TRANSITIONS=1208} [2022-11-20 11:48:34,658 INFO L288 CegarLoopForPetriNet]: 1259 programPoint places, 72 predicate places. [2022-11-20 11:48:34,658 INFO L495 AbstractCegarLoop]: Abstraction has has 1331 places, 1208 transitions, 2993 flow [2022-11-20 11:48:34,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1128.7941176470588) internal successors, (38379), 34 states have internal predecessors, (38379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:34,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:34,664 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:34,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:34,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-11-20 11:48:34,864 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:34,864 INFO L85 PathProgramCache]: Analyzing trace with hash -340579545, now seen corresponding path program 1 times [2022-11-20 11:48:34,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:34,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592185118] [2022-11-20 11:48:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:34,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:35,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592185118] [2022-11-20 11:48:35,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592185118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999159649] [2022-11-20 11:48:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:35,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:35,473 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:35,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-11-20 11:48:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:48:37,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:37,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:38,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999159649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:38,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:38,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:48:38,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215216949] [2022-11-20 11:48:38,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:38,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:48:38,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:38,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:48:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:48:38,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1126 out of 1426 [2022-11-20 11:48:38,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1331 places, 1208 transitions, 2993 flow. Second operand has 66 states, 66 states have (on average 1128.8939393939395) internal successors, (74507), 66 states have internal predecessors, (74507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:38,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:38,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1126 of 1426 [2022-11-20 11:48:38,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:48:42,946 INFO L130 PetriNetUnfolder]: 0/1657 cut-off events. [2022-11-20 11:48:42,947 INFO L131 PetriNetUnfolder]: For 3434/3434 co-relation queries the response was YES. [2022-11-20 11:48:42,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2927 conditions, 1657 events. 0/1657 cut-off events. For 3434/3434 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4824 event pairs, 0 based on Foata normal form. 16/1673 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-20 11:48:42,951 INFO L137 encePairwiseOnDemand]: 1420/1426 looper letters, 107 selfloop transitions, 93 changer transitions 0/1314 dead transitions. [2022-11-20 11:48:42,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1423 places, 1314 transitions, 4241 flow [2022-11-20 11:48:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:48:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:48:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104934 transitions. [2022-11-20 11:48:42,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912500565534091 [2022-11-20 11:48:42,998 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 104934 transitions. [2022-11-20 11:48:42,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 104934 transitions. [2022-11-20 11:48:43,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:43,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 104934 transitions. [2022-11-20 11:48:43,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1128.3225806451612) internal successors, (104934), 93 states have internal predecessors, (104934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:43,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1426.0) internal successors, (134044), 94 states have internal predecessors, (134044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:43,151 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1426.0) internal successors, (134044), 94 states have internal predecessors, (134044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:43,151 INFO L175 Difference]: Start difference. First operand has 1331 places, 1208 transitions, 2993 flow. Second operand 93 states and 104934 transitions. [2022-11-20 11:48:43,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1423 places, 1314 transitions, 4241 flow [2022-11-20 11:48:43,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1405 places, 1314 transitions, 4153 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:48:43,184 INFO L231 Difference]: Finished difference. Result has 1422 places, 1257 transitions, 3627 flow [2022-11-20 11:48:43,184 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1426, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=1313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3627, PETRI_PLACES=1422, PETRI_TRANSITIONS=1257} [2022-11-20 11:48:43,185 INFO L288 CegarLoopForPetriNet]: 1259 programPoint places, 163 predicate places. [2022-11-20 11:48:43,185 INFO L495 AbstractCegarLoop]: Abstraction has has 1422 places, 1257 transitions, 3627 flow [2022-11-20 11:48:43,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1128.8939393939395) internal successors, (74507), 66 states have internal predecessors, (74507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:43,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:43,193 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:43,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-11-20 11:48:43,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-11-20 11:48:43,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1227284511, now seen corresponding path program 1 times [2022-11-20 11:48:43,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:43,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808089822] [2022-11-20 11:48:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:43,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:45,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:45,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808089822] [2022-11-20 11:48:45,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808089822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:45,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94376503] [2022-11-20 11:48:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:45,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:45,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:45,727 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:45,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-11-20 11:48:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:47,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:48:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:48,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:51,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94376503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:51,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:51,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:48:51,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896177537] [2022-11-20 11:48:51,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:51,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:48:51,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:51,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:48:51,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:48:51,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1126 out of 1426 [2022-11-20 11:48:51,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1422 places, 1257 transitions, 3627 flow. Second operand has 130 states, 130 states have (on average 1128.946153846154) internal successors, (146763), 130 states have internal predecessors, (146763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:51,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:48:51,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1126 of 1426 [2022-11-20 11:48:51,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:48:58,207 INFO L130 PetriNetUnfolder]: 0/1514 cut-off events. [2022-11-20 11:48:58,207 INFO L131 PetriNetUnfolder]: For 6165/6165 co-relation queries the response was YES. [2022-11-20 11:48:58,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2760 conditions, 1514 events. 0/1514 cut-off events. For 6165/6165 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3913 event pairs, 0 based on Foata normal form. 11/1525 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-20 11:48:58,208 INFO L137 encePairwiseOnDemand]: 1421/1426 looper letters, 126 selfloop transitions, 124 changer transitions 0/1352 dead transitions. [2022-11-20 11:48:58,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1534 places, 1352 transitions, 4997 flow [2022-11-20 11:48:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-20 11:48:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-11-20 11:48:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142137 transitions. [2022-11-20 11:48:58,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7910739330795432 [2022-11-20 11:48:58,262 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 142137 transitions. [2022-11-20 11:48:58,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 142137 transitions. [2022-11-20 11:48:58,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:48:58,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 142137 transitions. [2022-11-20 11:48:58,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 1128.0714285714287) internal successors, (142137), 126 states have internal predecessors, (142137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:58,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 1426.0) internal successors, (181102), 127 states have internal predecessors, (181102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:58,465 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 1426.0) internal successors, (181102), 127 states have internal predecessors, (181102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:58,465 INFO L175 Difference]: Start difference. First operand has 1422 places, 1257 transitions, 3627 flow. Second operand 126 states and 142137 transitions. [2022-11-20 11:48:58,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1534 places, 1352 transitions, 4997 flow [2022-11-20 11:48:58,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1461 places, 1352 transitions, 4575 flow, removed 28 selfloop flow, removed 73 redundant places. [2022-11-20 11:48:58,489 INFO L231 Difference]: Finished difference. Result has 1461 places, 1274 transitions, 3807 flow [2022-11-20 11:48:58,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1426, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=1336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=3807, PETRI_PLACES=1461, PETRI_TRANSITIONS=1274} [2022-11-20 11:48:58,490 INFO L288 CegarLoopForPetriNet]: 1259 programPoint places, 202 predicate places. [2022-11-20 11:48:58,490 INFO L495 AbstractCegarLoop]: Abstraction has has 1461 places, 1274 transitions, 3807 flow [2022-11-20 11:48:58,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1128.946153846154) internal successors, (146763), 130 states have internal predecessors, (146763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:58,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:48:58,502 INFO L209 CegarLoopForPetriNet]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:58,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-11-20 11:48:58,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-11-20 11:48:58,702 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:48:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash 383443920, now seen corresponding path program 1 times [2022-11-20 11:48:58,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:58,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366612112] [2022-11-20 11:48:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:58,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:48:58,776 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:48:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:48:58,912 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:48:58,912 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:48:58,912 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:48:58,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:48:58,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2022-11-20 11:48:58,912 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:58,913 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:48:58,913 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2022-11-20 11:48:59,017 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:48:59,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1288 places, 1459 transitions, 4850 flow [2022-11-20 11:49:01,903 INFO L130 PetriNetUnfolder]: 424/3092 cut-off events. [2022-11-20 11:49:01,904 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2022-11-20 11:49:02,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 3092 events. 424/3092 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 11764 event pairs, 0 based on Foata normal form. 0/2582 useless extension candidates. Maximal degree in co-relation 3977. Up to 86 conditions per place. [2022-11-20 11:49:02,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 1288 places, 1459 transitions, 4850 flow [2022-11-20 11:49:02,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1288 places, 1459 transitions, 4850 flow [2022-11-20 11:49:02,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:49:02,400 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:49:02,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:49:02,405 INFO L130 PetriNetUnfolder]: 4/88 cut-off events. [2022-11-20 11:49:02,405 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:49:02,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:02,405 INFO L209 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] [2022-11-20 11:49:02,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash -835361242, now seen corresponding path program 1 times [2022-11-20 11:49:02,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:02,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476097931] [2022-11-20 11:49:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:02,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:02,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:02,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476097931] [2022-11-20 11:49:02,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476097931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:02,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:02,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:49:02,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251518963] [2022-11-20 11:49:02,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:02,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:49:02,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:49:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:49:02,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1160 out of 1459 [2022-11-20 11:49:02,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1288 places, 1459 transitions, 4850 flow. Second operand has 2 states, 2 states have (on average 1160.5) internal successors, (2321), 2 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:02,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:02,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1160 of 1459 [2022-11-20 11:49:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:49:05,030 INFO L130 PetriNetUnfolder]: 0/2625 cut-off events. [2022-11-20 11:49:05,030 INFO L131 PetriNetUnfolder]: For 14105/14105 co-relation queries the response was YES. [2022-11-20 11:49:05,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3698 conditions, 2625 events. 0/2625 cut-off events. For 14105/14105 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 11201 event pairs, 0 based on Foata normal form. 5346/7885 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-20 11:49:05,036 INFO L137 encePairwiseOnDemand]: 1203/1459 looper letters, 42 selfloop transitions, 0 changer transitions 12/1202 dead transitions. [2022-11-20 11:49:05,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1288 places, 1202 transitions, 4420 flow [2022-11-20 11:49:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:49:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:49:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2618 transitions. [2022-11-20 11:49:05,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8971898560657985 [2022-11-20 11:49:05,039 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2618 transitions. [2022-11-20 11:49:05,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2618 transitions. [2022-11-20 11:49:05,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:49:05,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2618 transitions. [2022-11-20 11:49:05,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1309.0) internal successors, (2618), 2 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:05,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1459.0) internal successors, (4377), 3 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:05,044 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1459.0) internal successors, (4377), 3 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:05,044 INFO L175 Difference]: Start difference. First operand has 1288 places, 1459 transitions, 4850 flow. Second operand 2 states and 2618 transitions. [2022-11-20 11:49:05,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1288 places, 1202 transitions, 4420 flow [2022-11-20 11:49:05,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1288 places, 1202 transitions, 2698 flow, removed 861 selfloop flow, removed 0 redundant places. [2022-11-20 11:49:05,073 INFO L231 Difference]: Finished difference. Result has 1288 places, 1190 transitions, 2590 flow [2022-11-20 11:49:05,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1459, PETRI_DIFFERENCE_MINUEND_FLOW=2614, PETRI_DIFFERENCE_MINUEND_PLACES=1287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2590, PETRI_PLACES=1288, PETRI_TRANSITIONS=1190} [2022-11-20 11:49:05,074 INFO L288 CegarLoopForPetriNet]: 1288 programPoint places, 0 predicate places. [2022-11-20 11:49:05,074 INFO L495 AbstractCegarLoop]: Abstraction has has 1288 places, 1190 transitions, 2590 flow [2022-11-20 11:49:05,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1160.5) internal successors, (2321), 2 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:05,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:05,075 INFO L209 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] [2022-11-20 11:49:05,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2022-11-20 11:49:05,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:05,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:05,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1128764249, now seen corresponding path program 1 times [2022-11-20 11:49:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217922323] [2022-11-20 11:49:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:05,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:05,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:05,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217922323] [2022-11-20 11:49:05,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217922323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:05,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:05,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:49:05,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005064182] [2022-11-20 11:49:05,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:05,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:49:05,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:05,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:49:05,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:49:05,122 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1153 out of 1459 [2022-11-20 11:49:05,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1288 places, 1190 transitions, 2590 flow. Second operand has 3 states, 3 states have (on average 1154.0) internal successors, (3462), 3 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:05,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:05,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1153 of 1459 [2022-11-20 11:49:05,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:49:07,598 INFO L130 PetriNetUnfolder]: 0/2096 cut-off events. [2022-11-20 11:49:07,598 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-20 11:49:07,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 2096 events. 0/2096 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7541 event pairs, 0 based on Foata normal form. 0/2054 useless extension candidates. Maximal degree in co-relation 0. Up to 252 conditions per place. [2022-11-20 11:49:07,602 INFO L137 encePairwiseOnDemand]: 1456/1459 looper letters, 51 selfloop transitions, 2 changer transitions 0/1194 dead transitions. [2022-11-20 11:49:07,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1278 places, 1194 transitions, 2704 flow [2022-11-20 11:49:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:49:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:49:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3513 transitions. [2022-11-20 11:49:07,605 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8026045236463331 [2022-11-20 11:49:07,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3513 transitions. [2022-11-20 11:49:07,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3513 transitions. [2022-11-20 11:49:07,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:49:07,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3513 transitions. [2022-11-20 11:49:07,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1171.0) internal successors, (3513), 3 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:07,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1459.0) internal successors, (5836), 4 states have internal predecessors, (5836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:07,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1459.0) internal successors, (5836), 4 states have internal predecessors, (5836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:07,610 INFO L175 Difference]: Start difference. First operand has 1288 places, 1190 transitions, 2590 flow. Second operand 3 states and 3513 transitions. [2022-11-20 11:49:07,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1278 places, 1194 transitions, 2704 flow [2022-11-20 11:49:07,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1278 places, 1194 transitions, 2704 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:49:07,621 INFO L231 Difference]: Finished difference. Result has 1279 places, 1191 transitions, 2602 flow [2022-11-20 11:49:07,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1459, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=1276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2602, PETRI_PLACES=1279, PETRI_TRANSITIONS=1191} [2022-11-20 11:49:07,622 INFO L288 CegarLoopForPetriNet]: 1288 programPoint places, -9 predicate places. [2022-11-20 11:49:07,622 INFO L495 AbstractCegarLoop]: Abstraction has has 1279 places, 1191 transitions, 2602 flow [2022-11-20 11:49:07,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1154.0) internal successors, (3462), 3 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:07,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:07,622 INFO L209 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] [2022-11-20 11:49:07,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2022-11-20 11:49:07,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1209238720, now seen corresponding path program 1 times [2022-11-20 11:49:07,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:07,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468361115] [2022-11-20 11:49:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:07,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:07,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:07,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468361115] [2022-11-20 11:49:07,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468361115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:07,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668277438] [2022-11-20 11:49:07,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:07,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:07,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:07,677 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:07,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-11-20 11:49:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:49:09,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:09,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:09,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668277438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:09,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:09,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:49:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225678094] [2022-11-20 11:49:09,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:09,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:49:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:49:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:49:09,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1152 out of 1459 [2022-11-20 11:49:09,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1279 places, 1191 transitions, 2602 flow. Second operand has 10 states, 10 states have (on average 1154.3) internal successors, (11543), 10 states have internal predecessors, (11543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:09,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:09,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1152 of 1459 [2022-11-20 11:49:09,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:49:12,306 INFO L130 PetriNetUnfolder]: 0/2070 cut-off events. [2022-11-20 11:49:12,307 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-20 11:49:12,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2623 conditions, 2070 events. 0/2070 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7416 event pairs, 0 based on Foata normal form. 2/2072 useless extension candidates. Maximal degree in co-relation 0. Up to 163 conditions per place. [2022-11-20 11:49:12,310 INFO L137 encePairwiseOnDemand]: 1453/1459 looper letters, 52 selfloop transitions, 9 changer transitions 0/1201 dead transitions. [2022-11-20 11:49:12,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1287 places, 1201 transitions, 2746 flow [2022-11-20 11:49:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:49:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:49:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10431 transitions. [2022-11-20 11:49:12,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.794379712131597 [2022-11-20 11:49:12,317 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 10431 transitions. [2022-11-20 11:49:12,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10431 transitions. [2022-11-20 11:49:12,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:49:12,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 10431 transitions. [2022-11-20 11:49:12,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1159.0) internal successors, (10431), 9 states have internal predecessors, (10431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:12,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1459.0) internal successors, (14590), 10 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:12,332 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1459.0) internal successors, (14590), 10 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:12,332 INFO L175 Difference]: Start difference. First operand has 1279 places, 1191 transitions, 2602 flow. Second operand 9 states and 10431 transitions. [2022-11-20 11:49:12,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1287 places, 1201 transitions, 2746 flow [2022-11-20 11:49:12,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1286 places, 1201 transitions, 2744 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:49:12,343 INFO L231 Difference]: Finished difference. Result has 1289 places, 1197 transitions, 2650 flow [2022-11-20 11:49:12,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1459, PETRI_DIFFERENCE_MINUEND_FLOW=2600, PETRI_DIFFERENCE_MINUEND_PLACES=1278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2650, PETRI_PLACES=1289, PETRI_TRANSITIONS=1197} [2022-11-20 11:49:12,344 INFO L288 CegarLoopForPetriNet]: 1288 programPoint places, 1 predicate places. [2022-11-20 11:49:12,344 INFO L495 AbstractCegarLoop]: Abstraction has has 1289 places, 1197 transitions, 2650 flow [2022-11-20 11:49:12,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1154.3) internal successors, (11543), 10 states have internal predecessors, (11543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:12,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:12,345 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:12,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:12,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:12,546 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:12,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1018802507, now seen corresponding path program 1 times [2022-11-20 11:49:12,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:12,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905788693] [2022-11-20 11:49:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:12,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:12,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:12,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905788693] [2022-11-20 11:49:12,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905788693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:12,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190104287] [2022-11-20 11:49:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:12,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:12,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:12,647 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:12,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-11-20 11:49:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:14,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:49:14,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:14,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190104287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:14,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:14,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:49:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762753138] [2022-11-20 11:49:14,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:14,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:49:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:14,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:49:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:49:14,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1152 out of 1459 [2022-11-20 11:49:14,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1289 places, 1197 transitions, 2650 flow. Second operand has 18 states, 18 states have (on average 1154.611111111111) internal successors, (20783), 18 states have internal predecessors, (20783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:14,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:14,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1152 of 1459 [2022-11-20 11:49:14,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:49:17,431 INFO L130 PetriNetUnfolder]: 0/2018 cut-off events. [2022-11-20 11:49:17,431 INFO L131 PetriNetUnfolder]: For 246/246 co-relation queries the response was YES. [2022-11-20 11:49:17,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 2018 events. 0/2018 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7067 event pairs, 0 based on Foata normal form. 4/2022 useless extension candidates. Maximal degree in co-relation 0. Up to 147 conditions per place. [2022-11-20 11:49:17,435 INFO L137 encePairwiseOnDemand]: 1453/1459 looper letters, 60 selfloop transitions, 21 changer transitions 0/1221 dead transitions. [2022-11-20 11:49:17,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1309 places, 1221 transitions, 2920 flow [2022-11-20 11:49:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:49:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:49:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24277 transitions. [2022-11-20 11:49:17,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7923561473938444 [2022-11-20 11:49:17,446 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 24277 transitions. [2022-11-20 11:49:17,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 24277 transitions. [2022-11-20 11:49:17,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:49:17,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 24277 transitions. [2022-11-20 11:49:17,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1156.047619047619) internal successors, (24277), 21 states have internal predecessors, (24277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:17,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1459.0) internal successors, (32098), 22 states have internal predecessors, (32098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:17,483 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1459.0) internal successors, (32098), 22 states have internal predecessors, (32098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:17,483 INFO L175 Difference]: Start difference. First operand has 1289 places, 1197 transitions, 2650 flow. Second operand 21 states and 24277 transitions. [2022-11-20 11:49:17,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1309 places, 1221 transitions, 2920 flow [2022-11-20 11:49:17,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1308 places, 1221 transitions, 2906 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:49:17,496 INFO L231 Difference]: Finished difference. Result has 1313 places, 1210 transitions, 2774 flow [2022-11-20 11:49:17,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1459, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=1288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2774, PETRI_PLACES=1313, PETRI_TRANSITIONS=1210} [2022-11-20 11:49:17,497 INFO L288 CegarLoopForPetriNet]: 1288 programPoint places, 25 predicate places. [2022-11-20 11:49:17,497 INFO L495 AbstractCegarLoop]: Abstraction has has 1313 places, 1210 transitions, 2774 flow [2022-11-20 11:49:17,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1154.611111111111) internal successors, (20783), 18 states have internal predecessors, (20783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:17,499 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:17,499 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:17,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-11-20 11:49:17,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:17,700 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash 811436971, now seen corresponding path program 1 times [2022-11-20 11:49:17,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:17,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973691942] [2022-11-20 11:49:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:17,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:17,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973691942] [2022-11-20 11:49:17,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973691942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722810078] [2022-11-20 11:49:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:17,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:17,987 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:18,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-11-20 11:49:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:49:20,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:20,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:20,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722810078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:20,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:20,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:49:20,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934294805] [2022-11-20 11:49:20,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:20,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:49:20,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:49:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:49:20,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1152 out of 1459 [2022-11-20 11:49:20,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1313 places, 1210 transitions, 2774 flow. Second operand has 34 states, 34 states have (on average 1154.7941176470588) internal successors, (39263), 34 states have internal predecessors, (39263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:20,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:20,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1152 of 1459 [2022-11-20 11:49:20,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:49:23,234 INFO L130 PetriNetUnfolder]: 0/1914 cut-off events. [2022-11-20 11:49:23,234 INFO L131 PetriNetUnfolder]: For 1005/1005 co-relation queries the response was YES. [2022-11-20 11:49:23,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 1914 events. 0/1914 cut-off events. For 1005/1005 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6367 event pairs, 0 based on Foata normal form. 8/1922 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-11-20 11:49:23,238 INFO L137 encePairwiseOnDemand]: 1453/1459 looper letters, 76 selfloop transitions, 45 changer transitions 0/1261 dead transitions. [2022-11-20 11:49:23,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1357 places, 1261 transitions, 3332 flow [2022-11-20 11:49:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:49:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:49:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51969 transitions. [2022-11-20 11:49:23,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7915467214987434 [2022-11-20 11:49:23,262 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 51969 transitions. [2022-11-20 11:49:23,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 51969 transitions. [2022-11-20 11:49:23,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:49:23,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 51969 transitions. [2022-11-20 11:49:23,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1154.8666666666666) internal successors, (51969), 45 states have internal predecessors, (51969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:23,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1459.0) internal successors, (67114), 46 states have internal predecessors, (67114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:23,335 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1459.0) internal successors, (67114), 46 states have internal predecessors, (67114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:23,336 INFO L175 Difference]: Start difference. First operand has 1313 places, 1210 transitions, 2774 flow. Second operand 45 states and 51969 transitions. [2022-11-20 11:49:23,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1357 places, 1261 transitions, 3332 flow [2022-11-20 11:49:23,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1351 places, 1261 transitions, 3292 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:49:23,354 INFO L231 Difference]: Finished difference. Result has 1360 places, 1235 transitions, 3052 flow [2022-11-20 11:49:23,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1459, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=1307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3052, PETRI_PLACES=1360, PETRI_TRANSITIONS=1235} [2022-11-20 11:49:23,355 INFO L288 CegarLoopForPetriNet]: 1288 programPoint places, 72 predicate places. [2022-11-20 11:49:23,355 INFO L495 AbstractCegarLoop]: Abstraction has has 1360 places, 1235 transitions, 3052 flow [2022-11-20 11:49:23,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1154.7941176470588) internal successors, (39263), 34 states have internal predecessors, (39263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:23,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:23,358 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:23,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-11-20 11:49:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:23,559 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:23,559 INFO L85 PathProgramCache]: Analyzing trace with hash 928040391, now seen corresponding path program 1 times [2022-11-20 11:49:23,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:23,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226320920] [2022-11-20 11:49:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:24,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:24,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226320920] [2022-11-20 11:49:24,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226320920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:24,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149606199] [2022-11-20 11:49:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:24,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:24,161 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:24,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-11-20 11:49:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:49:26,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:26,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:27,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149606199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:27,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:27,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:49:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276235107] [2022-11-20 11:49:27,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:49:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:49:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:49:27,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1152 out of 1459 [2022-11-20 11:49:27,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1360 places, 1235 transitions, 3052 flow. Second operand has 66 states, 66 states have (on average 1154.8939393939395) internal successors, (76223), 66 states have internal predecessors, (76223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:27,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:27,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1152 of 1459 [2022-11-20 11:49:27,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:49:31,645 INFO L130 PetriNetUnfolder]: 0/1706 cut-off events. [2022-11-20 11:49:31,646 INFO L131 PetriNetUnfolder]: For 3555/3555 co-relation queries the response was YES. [2022-11-20 11:49:31,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3019 conditions, 1706 events. 0/1706 cut-off events. For 3555/3555 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5015 event pairs, 0 based on Foata normal form. 16/1722 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2022-11-20 11:49:31,649 INFO L137 encePairwiseOnDemand]: 1453/1459 looper letters, 108 selfloop transitions, 93 changer transitions 0/1341 dead transitions. [2022-11-20 11:49:31,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1452 places, 1341 transitions, 4302 flow [2022-11-20 11:49:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:49:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:49:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107353 transitions. [2022-11-20 11:49:31,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911811743203108 [2022-11-20 11:49:31,708 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 107353 transitions. [2022-11-20 11:49:31,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 107353 transitions. [2022-11-20 11:49:31,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:49:31,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 107353 transitions. [2022-11-20 11:49:31,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1154.3333333333333) internal successors, (107353), 93 states have internal predecessors, (107353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:31,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1459.0) internal successors, (137146), 94 states have internal predecessors, (137146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:31,863 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1459.0) internal successors, (137146), 94 states have internal predecessors, (137146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:31,864 INFO L175 Difference]: Start difference. First operand has 1360 places, 1235 transitions, 3052 flow. Second operand 93 states and 107353 transitions. [2022-11-20 11:49:31,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1452 places, 1341 transitions, 4302 flow [2022-11-20 11:49:31,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1434 places, 1341 transitions, 4214 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:49:31,898 INFO L231 Difference]: Finished difference. Result has 1451 places, 1284 transitions, 3686 flow [2022-11-20 11:49:31,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1459, PETRI_DIFFERENCE_MINUEND_FLOW=2996, PETRI_DIFFERENCE_MINUEND_PLACES=1342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3686, PETRI_PLACES=1451, PETRI_TRANSITIONS=1284} [2022-11-20 11:49:31,899 INFO L288 CegarLoopForPetriNet]: 1288 programPoint places, 163 predicate places. [2022-11-20 11:49:31,899 INFO L495 AbstractCegarLoop]: Abstraction has has 1451 places, 1284 transitions, 3686 flow [2022-11-20 11:49:31,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1154.8939393939395) internal successors, (76223), 66 states have internal predecessors, (76223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:31,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:31,906 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:31,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-11-20 11:49:32,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-11-20 11:49:32,106 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:32,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:32,107 INFO L85 PathProgramCache]: Analyzing trace with hash -653952321, now seen corresponding path program 1 times [2022-11-20 11:49:32,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:32,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599863088] [2022-11-20 11:49:32,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:32,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:34,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:34,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599863088] [2022-11-20 11:49:34,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599863088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:34,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474606611] [2022-11-20 11:49:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:34,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:34,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:34,393 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:34,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-11-20 11:49:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:49:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:36,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:40,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474606611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:40,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:40,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:49:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423716548] [2022-11-20 11:49:40,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:40,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:49:40,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:40,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:49:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:49:40,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1152 out of 1459 [2022-11-20 11:49:40,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1451 places, 1284 transitions, 3686 flow. Second operand has 130 states, 130 states have (on average 1154.946153846154) internal successors, (150143), 130 states have internal predecessors, (150143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:40,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:40,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1152 of 1459 [2022-11-20 11:49:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:49:46,704 INFO L130 PetriNetUnfolder]: 0/1550 cut-off events. [2022-11-20 11:49:46,704 INFO L131 PetriNetUnfolder]: For 6662/6662 co-relation queries the response was YES. [2022-11-20 11:49:46,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2828 conditions, 1550 events. 0/1550 cut-off events. For 6662/6662 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 4011 event pairs, 0 based on Foata normal form. 12/1562 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2022-11-20 11:49:46,707 INFO L137 encePairwiseOnDemand]: 1454/1459 looper letters, 129 selfloop transitions, 127 changer transitions 0/1384 dead transitions. [2022-11-20 11:49:46,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1566 places, 1384 transitions, 5122 flow [2022-11-20 11:49:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-20 11:49:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2022-11-20 11:49:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148876 transitions. [2022-11-20 11:49:46,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7910058391911206 [2022-11-20 11:49:46,767 INFO L72 ComplementDD]: Start complementDD. Operand 129 states and 148876 transitions. [2022-11-20 11:49:46,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 148876 transitions. [2022-11-20 11:49:46,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:49:46,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 129 states and 148876 transitions. [2022-11-20 11:49:47,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 130 states, 129 states have (on average 1154.077519379845) internal successors, (148876), 129 states have internal predecessors, (148876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:47,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 130 states, 130 states have (on average 1459.0) internal successors, (189670), 130 states have internal predecessors, (189670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:47,342 INFO L81 ComplementDD]: Finished complementDD. Result has 130 states, 130 states have (on average 1459.0) internal successors, (189670), 130 states have internal predecessors, (189670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:47,342 INFO L175 Difference]: Start difference. First operand has 1451 places, 1284 transitions, 3686 flow. Second operand 129 states and 148876 transitions. [2022-11-20 11:49:47,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1566 places, 1384 transitions, 5122 flow [2022-11-20 11:49:47,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1493 places, 1384 transitions, 4690 flow, removed 29 selfloop flow, removed 73 redundant places. [2022-11-20 11:49:47,367 INFO L231 Difference]: Finished difference. Result has 1493 places, 1304 transitions, 3900 flow [2022-11-20 11:49:47,367 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1459, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=1365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=129, PETRI_FLOW=3900, PETRI_PLACES=1493, PETRI_TRANSITIONS=1304} [2022-11-20 11:49:47,368 INFO L288 CegarLoopForPetriNet]: 1288 programPoint places, 205 predicate places. [2022-11-20 11:49:47,368 INFO L495 AbstractCegarLoop]: Abstraction has has 1493 places, 1304 transitions, 3900 flow [2022-11-20 11:49:47,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1154.946153846154) internal successors, (150143), 130 states have internal predecessors, (150143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:47,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:47,380 INFO L209 CegarLoopForPetriNet]: trace histogram [43, 43, 43, 43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:47,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:47,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-11-20 11:49:47,582 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1281953966, now seen corresponding path program 1 times [2022-11-20 11:49:47,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:47,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267732960] [2022-11-20 11:49:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:47,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:49:47,806 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:49:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:49:47,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:49:47,942 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:49:47,942 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:49:47,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:49:47,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2022-11-20 11:49:47,943 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:47,943 WARN L233 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:49:47,944 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2022-11-20 11:49:48,050 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:49:48,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1317 places, 1492 transitions, 5005 flow [2022-11-20 11:49:51,417 INFO L130 PetriNetUnfolder]: 434/3164 cut-off events. [2022-11-20 11:49:51,417 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2022-11-20 11:49:51,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4240 conditions, 3164 events. 434/3164 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 12069 event pairs, 0 based on Foata normal form. 0/2642 useless extension candidates. Maximal degree in co-relation 4094. Up to 88 conditions per place. [2022-11-20 11:49:51,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 1317 places, 1492 transitions, 5005 flow [2022-11-20 11:49:51,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1317 places, 1492 transitions, 5005 flow [2022-11-20 11:49:51,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:49:51,724 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;@507097c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:49:51,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:49:51,729 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-20 11:49:51,730 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:49:51,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:51,730 INFO L209 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] [2022-11-20 11:49:51,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:51,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1884551258, now seen corresponding path program 1 times [2022-11-20 11:49:51,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:51,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23749788] [2022-11-20 11:49:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:51,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:51,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23749788] [2022-11-20 11:49:51,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23749788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:51,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:51,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:49:51,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859066980] [2022-11-20 11:49:51,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:51,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:49:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:49:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:49:51,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1186 out of 1492 [2022-11-20 11:49:51,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1317 places, 1492 transitions, 5005 flow. Second operand has 2 states, 2 states have (on average 1186.5) internal successors, (2373), 2 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:51,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:51,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1186 of 1492 [2022-11-20 11:49:51,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:49:54,651 INFO L130 PetriNetUnfolder]: 0/2686 cut-off events. [2022-11-20 11:49:54,651 INFO L131 PetriNetUnfolder]: For 15093/15093 co-relation queries the response was YES. [2022-11-20 11:49:54,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3806 conditions, 2686 events. 0/2686 cut-off events. For 15093/15093 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 11462 event pairs, 0 based on Foata normal form. 5602/8200 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2022-11-20 11:49:54,656 INFO L137 encePairwiseOnDemand]: 1230/1492 looper letters, 43 selfloop transitions, 0 changer transitions 12/1229 dead transitions. [2022-11-20 11:49:54,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1317 places, 1229 transitions, 4565 flow [2022-11-20 11:49:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:49:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:49:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2677 transitions. [2022-11-20 11:49:54,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8971179624664879 [2022-11-20 11:49:54,659 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2677 transitions. [2022-11-20 11:49:54,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2677 transitions. [2022-11-20 11:49:54,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:49:54,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2677 transitions. [2022-11-20 11:49:54,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1338.5) internal successors, (2677), 2 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:54,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1492.0) internal successors, (4476), 3 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:54,662 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1492.0) internal successors, (4476), 3 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:54,662 INFO L175 Difference]: Start difference. First operand has 1317 places, 1492 transitions, 5005 flow. Second operand 2 states and 2677 transitions. [2022-11-20 11:49:54,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1317 places, 1229 transitions, 4565 flow [2022-11-20 11:49:54,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1317 places, 1229 transitions, 2759 flow, removed 903 selfloop flow, removed 0 redundant places. [2022-11-20 11:49:54,699 INFO L231 Difference]: Finished difference. Result has 1317 places, 1217 transitions, 2649 flow [2022-11-20 11:49:54,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1492, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=1316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2649, PETRI_PLACES=1317, PETRI_TRANSITIONS=1217} [2022-11-20 11:49:54,700 INFO L288 CegarLoopForPetriNet]: 1317 programPoint places, 0 predicate places. [2022-11-20 11:49:54,700 INFO L495 AbstractCegarLoop]: Abstraction has has 1317 places, 1217 transitions, 2649 flow [2022-11-20 11:49:54,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1186.5) internal successors, (2373), 2 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:54,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:54,700 INFO L209 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] [2022-11-20 11:49:54,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2022-11-20 11:49:54,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:54,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2117013031, now seen corresponding path program 1 times [2022-11-20 11:49:54,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:54,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097290049] [2022-11-20 11:49:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:54,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:54,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097290049] [2022-11-20 11:49:54,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097290049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:54,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:54,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:49:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779402410] [2022-11-20 11:49:54,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:54,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:49:54,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:54,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:49:54,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:49:54,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1179 out of 1492 [2022-11-20 11:49:54,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1317 places, 1217 transitions, 2649 flow. Second operand has 3 states, 3 states have (on average 1180.0) internal successors, (3540), 3 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:54,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:54,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1179 of 1492 [2022-11-20 11:49:54,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:49:57,246 INFO L130 PetriNetUnfolder]: 0/2145 cut-off events. [2022-11-20 11:49:57,246 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-20 11:49:57,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2582 conditions, 2145 events. 0/2145 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7724 event pairs, 0 based on Foata normal form. 0/2102 useless extension candidates. Maximal degree in co-relation 0. Up to 258 conditions per place. [2022-11-20 11:49:57,250 INFO L137 encePairwiseOnDemand]: 1489/1492 looper letters, 52 selfloop transitions, 2 changer transitions 0/1221 dead transitions. [2022-11-20 11:49:57,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1307 places, 1221 transitions, 2765 flow [2022-11-20 11:49:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:49:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:49:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3592 transitions. [2022-11-20 11:49:57,253 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8025022341376229 [2022-11-20 11:49:57,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3592 transitions. [2022-11-20 11:49:57,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3592 transitions. [2022-11-20 11:49:57,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:49:57,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3592 transitions. [2022-11-20 11:49:57,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1197.3333333333333) internal successors, (3592), 3 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:57,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1492.0) internal successors, (5968), 4 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:57,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1492.0) internal successors, (5968), 4 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:57,259 INFO L175 Difference]: Start difference. First operand has 1317 places, 1217 transitions, 2649 flow. Second operand 3 states and 3592 transitions. [2022-11-20 11:49:57,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1307 places, 1221 transitions, 2765 flow [2022-11-20 11:49:57,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1307 places, 1221 transitions, 2765 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:49:57,270 INFO L231 Difference]: Finished difference. Result has 1308 places, 1218 transitions, 2661 flow [2022-11-20 11:49:57,270 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1492, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=1305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2661, PETRI_PLACES=1308, PETRI_TRANSITIONS=1218} [2022-11-20 11:49:57,271 INFO L288 CegarLoopForPetriNet]: 1317 programPoint places, -9 predicate places. [2022-11-20 11:49:57,271 INFO L495 AbstractCegarLoop]: Abstraction has has 1308 places, 1218 transitions, 2661 flow [2022-11-20 11:49:57,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1180.0) internal successors, (3540), 3 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:57,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:49:57,271 INFO L209 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] [2022-11-20 11:49:57,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2022-11-20 11:49:57,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:49:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1977145696, now seen corresponding path program 1 times [2022-11-20 11:49:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:57,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926876376] [2022-11-20 11:49:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:57,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:57,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926876376] [2022-11-20 11:49:57,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926876376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000552212] [2022-11-20 11:49:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:57,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:57,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:57,333 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:57,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-11-20 11:49:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:49:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:59,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:59,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000552212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:59,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:59,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:49:59,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720895691] [2022-11-20 11:49:59,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:59,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:49:59,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:59,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:49:59,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:49:59,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1178 out of 1492 [2022-11-20 11:49:59,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1308 places, 1218 transitions, 2661 flow. Second operand has 10 states, 10 states have (on average 1180.3) internal successors, (11803), 10 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:59,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:49:59,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1178 of 1492 [2022-11-20 11:49:59,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:50:02,269 INFO L130 PetriNetUnfolder]: 0/2119 cut-off events. [2022-11-20 11:50:02,269 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-20 11:50:02,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2119 events. 0/2119 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7573 event pairs, 0 based on Foata normal form. 2/2121 useless extension candidates. Maximal degree in co-relation 0. Up to 167 conditions per place. [2022-11-20 11:50:02,273 INFO L137 encePairwiseOnDemand]: 1486/1492 looper letters, 53 selfloop transitions, 9 changer transitions 0/1228 dead transitions. [2022-11-20 11:50:02,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1316 places, 1228 transitions, 2807 flow [2022-11-20 11:50:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:50:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:50:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10666 transitions. [2022-11-20 11:50:02,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7943103961870718 [2022-11-20 11:50:02,280 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 10666 transitions. [2022-11-20 11:50:02,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10666 transitions. [2022-11-20 11:50:02,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:50:02,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 10666 transitions. [2022-11-20 11:50:02,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1185.111111111111) internal successors, (10666), 9 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:02,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1492.0) internal successors, (14920), 10 states have internal predecessors, (14920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:02,298 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1492.0) internal successors, (14920), 10 states have internal predecessors, (14920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:02,298 INFO L175 Difference]: Start difference. First operand has 1308 places, 1218 transitions, 2661 flow. Second operand 9 states and 10666 transitions. [2022-11-20 11:50:02,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1316 places, 1228 transitions, 2807 flow [2022-11-20 11:50:02,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1315 places, 1228 transitions, 2805 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:50:02,311 INFO L231 Difference]: Finished difference. Result has 1318 places, 1224 transitions, 2709 flow [2022-11-20 11:50:02,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1492, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=1307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2709, PETRI_PLACES=1318, PETRI_TRANSITIONS=1224} [2022-11-20 11:50:02,312 INFO L288 CegarLoopForPetriNet]: 1317 programPoint places, 1 predicate places. [2022-11-20 11:50:02,312 INFO L495 AbstractCegarLoop]: Abstraction has has 1318 places, 1224 transitions, 2709 flow [2022-11-20 11:50:02,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1180.3) internal successors, (11803), 10 states have internal predecessors, (11803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:02,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:50:02,313 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:50:02,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-11-20 11:50:02,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-11-20 11:50:02,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:50:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:50:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1787408875, now seen corresponding path program 1 times [2022-11-20 11:50:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:50:02,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050432987] [2022-11-20 11:50:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:50:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:02,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:50:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050432987] [2022-11-20 11:50:02,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050432987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:50:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679510471] [2022-11-20 11:50:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:02,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:02,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:50:02,636 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:50:02,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-11-20 11:50:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:04,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:50:04,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:50:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:04,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:50:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:04,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679510471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:50:04,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:50:04,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:50:04,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037043339] [2022-11-20 11:50:04,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:50:04,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:50:04,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:50:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:50:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:50:04,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1178 out of 1492 [2022-11-20 11:50:04,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1318 places, 1224 transitions, 2709 flow. Second operand has 18 states, 18 states have (on average 1180.611111111111) internal successors, (21251), 18 states have internal predecessors, (21251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:04,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:50:04,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1178 of 1492 [2022-11-20 11:50:04,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:50:07,610 INFO L130 PetriNetUnfolder]: 0/2067 cut-off events. [2022-11-20 11:50:07,610 INFO L131 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2022-11-20 11:50:07,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2958 conditions, 2067 events. 0/2067 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7232 event pairs, 0 based on Foata normal form. 4/2071 useless extension candidates. Maximal degree in co-relation 0. Up to 151 conditions per place. [2022-11-20 11:50:07,616 INFO L137 encePairwiseOnDemand]: 1486/1492 looper letters, 61 selfloop transitions, 21 changer transitions 0/1248 dead transitions. [2022-11-20 11:50:07,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1338 places, 1248 transitions, 2981 flow [2022-11-20 11:50:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:50:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:50:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24824 transitions. [2022-11-20 11:50:07,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922890335758969 [2022-11-20 11:50:07,636 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 24824 transitions. [2022-11-20 11:50:07,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 24824 transitions. [2022-11-20 11:50:07,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:50:07,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 24824 transitions. [2022-11-20 11:50:07,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1182.095238095238) internal successors, (24824), 21 states have internal predecessors, (24824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:07,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1492.0) internal successors, (32824), 22 states have internal predecessors, (32824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:07,693 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1492.0) internal successors, (32824), 22 states have internal predecessors, (32824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:07,693 INFO L175 Difference]: Start difference. First operand has 1318 places, 1224 transitions, 2709 flow. Second operand 21 states and 24824 transitions. [2022-11-20 11:50:07,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1338 places, 1248 transitions, 2981 flow [2022-11-20 11:50:07,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1337 places, 1248 transitions, 2967 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:50:07,713 INFO L231 Difference]: Finished difference. Result has 1342 places, 1237 transitions, 2833 flow [2022-11-20 11:50:07,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1492, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=1317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2833, PETRI_PLACES=1342, PETRI_TRANSITIONS=1237} [2022-11-20 11:50:07,714 INFO L288 CegarLoopForPetriNet]: 1317 programPoint places, 25 predicate places. [2022-11-20 11:50:07,714 INFO L495 AbstractCegarLoop]: Abstraction has has 1342 places, 1237 transitions, 2833 flow [2022-11-20 11:50:07,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1180.611111111111) internal successors, (21251), 18 states have internal predecessors, (21251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:07,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:50:07,716 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:50:07,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-11-20 11:50:07,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-11-20 11:50:07,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:50:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:50:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash -397578869, now seen corresponding path program 1 times [2022-11-20 11:50:07,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:50:07,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150359845] [2022-11-20 11:50:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:50:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:08,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:50:08,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150359845] [2022-11-20 11:50:08,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150359845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:50:08,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758330421] [2022-11-20 11:50:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:08,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:08,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:50:08,190 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:50:08,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-11-20 11:50:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:50:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:50:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:10,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:50:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:10,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758330421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:50:10,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:50:10,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 11:50:10,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691137122] [2022-11-20 11:50:10,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:50:10,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:50:10,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:50:10,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:50:10,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:50:10,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1178 out of 1492 [2022-11-20 11:50:10,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1342 places, 1237 transitions, 2833 flow. Second operand has 34 states, 34 states have (on average 1180.7941176470588) internal successors, (40147), 34 states have internal predecessors, (40147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:10,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:50:10,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1178 of 1492 [2022-11-20 11:50:10,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:50:14,141 INFO L130 PetriNetUnfolder]: 0/1963 cut-off events. [2022-11-20 11:50:14,141 INFO L131 PetriNetUnfolder]: For 1032/1032 co-relation queries the response was YES. [2022-11-20 11:50:14,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3149 conditions, 1963 events. 0/1963 cut-off events. For 1032/1032 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6571 event pairs, 0 based on Foata normal form. 8/1971 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-11-20 11:50:14,145 INFO L137 encePairwiseOnDemand]: 1486/1492 looper letters, 77 selfloop transitions, 45 changer transitions 0/1288 dead transitions. [2022-11-20 11:50:14,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1386 places, 1288 transitions, 3393 flow [2022-11-20 11:50:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:50:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 11:50:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53140 transitions. [2022-11-20 11:50:14,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914804885314268 [2022-11-20 11:50:14,171 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 53140 transitions. [2022-11-20 11:50:14,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 53140 transitions. [2022-11-20 11:50:14,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:50:14,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 53140 transitions. [2022-11-20 11:50:14,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1180.888888888889) internal successors, (53140), 45 states have internal predecessors, (53140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:14,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1492.0) internal successors, (68632), 46 states have internal predecessors, (68632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:14,252 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1492.0) internal successors, (68632), 46 states have internal predecessors, (68632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:14,252 INFO L175 Difference]: Start difference. First operand has 1342 places, 1237 transitions, 2833 flow. Second operand 45 states and 53140 transitions. [2022-11-20 11:50:14,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1386 places, 1288 transitions, 3393 flow [2022-11-20 11:50:14,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1380 places, 1288 transitions, 3353 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 11:50:14,271 INFO L231 Difference]: Finished difference. Result has 1389 places, 1262 transitions, 3111 flow [2022-11-20 11:50:14,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1492, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=1336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3111, PETRI_PLACES=1389, PETRI_TRANSITIONS=1262} [2022-11-20 11:50:14,272 INFO L288 CegarLoopForPetriNet]: 1317 programPoint places, 72 predicate places. [2022-11-20 11:50:14,272 INFO L495 AbstractCegarLoop]: Abstraction has has 1389 places, 1262 transitions, 3111 flow [2022-11-20 11:50:14,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1180.7941176470588) internal successors, (40147), 34 states have internal predecessors, (40147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:14,275 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:50:14,275 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:50:14,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-11-20 11:50:14,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:14,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:50:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:50:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash 174255271, now seen corresponding path program 1 times [2022-11-20 11:50:14,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:50:14,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976545025] [2022-11-20 11:50:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:14,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:50:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:15,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:50:15,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976545025] [2022-11-20 11:50:15,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976545025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:50:15,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496889295] [2022-11-20 11:50:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:15,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:15,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:50:15,093 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:50:15,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-11-20 11:50:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:17,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:50:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:50:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:17,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:50:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:18,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496889295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:50:18,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:50:18,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 11:50:18,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909258246] [2022-11-20 11:50:18,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:50:18,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:50:18,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:50:18,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:50:18,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:50:18,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1178 out of 1492 [2022-11-20 11:50:18,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1389 places, 1262 transitions, 3111 flow. Second operand has 66 states, 66 states have (on average 1180.8939393939395) internal successors, (77939), 66 states have internal predecessors, (77939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:18,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:50:18,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1178 of 1492 [2022-11-20 11:50:18,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:50:23,297 INFO L130 PetriNetUnfolder]: 0/1755 cut-off events. [2022-11-20 11:50:23,297 INFO L131 PetriNetUnfolder]: For 3676/3676 co-relation queries the response was YES. [2022-11-20 11:50:23,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3111 conditions, 1755 events. 0/1755 cut-off events. For 3676/3676 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5187 event pairs, 0 based on Foata normal form. 16/1771 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2022-11-20 11:50:23,301 INFO L137 encePairwiseOnDemand]: 1486/1492 looper letters, 109 selfloop transitions, 93 changer transitions 0/1368 dead transitions. [2022-11-20 11:50:23,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1481 places, 1368 transitions, 4363 flow [2022-11-20 11:50:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 11:50:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 11:50:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109772 transitions. [2022-11-20 11:50:23,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911153391565049 [2022-11-20 11:50:23,355 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 109772 transitions. [2022-11-20 11:50:23,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 109772 transitions. [2022-11-20 11:50:23,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:50:23,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 109772 transitions. [2022-11-20 11:50:23,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1180.3440860215053) internal successors, (109772), 93 states have internal predecessors, (109772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:23,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1492.0) internal successors, (140248), 94 states have internal predecessors, (140248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:23,723 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1492.0) internal successors, (140248), 94 states have internal predecessors, (140248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:23,723 INFO L175 Difference]: Start difference. First operand has 1389 places, 1262 transitions, 3111 flow. Second operand 93 states and 109772 transitions. [2022-11-20 11:50:23,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1481 places, 1368 transitions, 4363 flow [2022-11-20 11:50:23,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1463 places, 1368 transitions, 4275 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 11:50:23,761 INFO L231 Difference]: Finished difference. Result has 1480 places, 1311 transitions, 3745 flow [2022-11-20 11:50:23,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1492, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=1371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3745, PETRI_PLACES=1480, PETRI_TRANSITIONS=1311} [2022-11-20 11:50:23,762 INFO L288 CegarLoopForPetriNet]: 1317 programPoint places, 163 predicate places. [2022-11-20 11:50:23,762 INFO L495 AbstractCegarLoop]: Abstraction has has 1480 places, 1311 transitions, 3745 flow [2022-11-20 11:50:23,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1180.8939393939395) internal successors, (77939), 66 states have internal predecessors, (77939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:23,772 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:50:23,772 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:50:23,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-11-20 11:50:23,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:23,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:50:23,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:50:23,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1226429537, now seen corresponding path program 1 times [2022-11-20 11:50:23,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:50:23,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263476152] [2022-11-20 11:50:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:23,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:50:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:26,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:50:26,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263476152] [2022-11-20 11:50:26,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263476152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:50:26,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650938674] [2022-11-20 11:50:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:26,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:26,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:50:26,311 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:50:26,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-11-20 11:50:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:50:28,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 11:50:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:50:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:28,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:50:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:50:32,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650938674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:50:32,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:50:32,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 11:50:32,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968326242] [2022-11-20 11:50:32,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:50:32,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 11:50:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:50:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 11:50:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 11:50:32,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1178 out of 1492 [2022-11-20 11:50:32,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1480 places, 1311 transitions, 3745 flow. Second operand has 130 states, 130 states have (on average 1180.946153846154) internal successors, (153523), 130 states have internal predecessors, (153523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:32,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:50:32,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1178 of 1492 [2022-11-20 11:50:32,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:50:39,277 INFO L130 PetriNetUnfolder]: 0/1586 cut-off events. [2022-11-20 11:50:39,277 INFO L131 PetriNetUnfolder]: For 7159/7159 co-relation queries the response was YES. [2022-11-20 11:50:39,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2896 conditions, 1586 events. 0/1586 cut-off events. For 7159/7159 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 4109 event pairs, 0 based on Foata normal form. 13/1599 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2022-11-20 11:50:39,279 INFO L137 encePairwiseOnDemand]: 1487/1492 looper letters, 132 selfloop transitions, 130 changer transitions 0/1416 dead transitions. [2022-11-20 11:50:39,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1598 places, 1416 transitions, 5247 flow [2022-11-20 11:50:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-20 11:50:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2022-11-20 11:50:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155771 transitions. [2022-11-20 11:50:39,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7909405719392315 [2022-11-20 11:50:39,340 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 155771 transitions. [2022-11-20 11:50:39,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 155771 transitions. [2022-11-20 11:50:39,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:50:39,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 155771 transitions. [2022-11-20 11:50:39,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 1180.0833333333333) internal successors, (155771), 132 states have internal predecessors, (155771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:39,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 1492.0) internal successors, (198436), 133 states have internal predecessors, (198436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:39,575 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 1492.0) internal successors, (198436), 133 states have internal predecessors, (198436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:39,576 INFO L175 Difference]: Start difference. First operand has 1480 places, 1311 transitions, 3745 flow. Second operand 132 states and 155771 transitions. [2022-11-20 11:50:39,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1598 places, 1416 transitions, 5247 flow [2022-11-20 11:50:39,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1525 places, 1416 transitions, 4805 flow, removed 30 selfloop flow, removed 73 redundant places. [2022-11-20 11:50:39,605 INFO L231 Difference]: Finished difference. Result has 1525 places, 1334 transitions, 3993 flow [2022-11-20 11:50:39,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1492, PETRI_DIFFERENCE_MINUEND_FLOW=3397, PETRI_DIFFERENCE_MINUEND_PLACES=1394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=3993, PETRI_PLACES=1525, PETRI_TRANSITIONS=1334} [2022-11-20 11:50:39,606 INFO L288 CegarLoopForPetriNet]: 1317 programPoint places, 208 predicate places. [2022-11-20 11:50:39,606 INFO L495 AbstractCegarLoop]: Abstraction has has 1525 places, 1334 transitions, 3993 flow [2022-11-20 11:50:39,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1180.946153846154) internal successors, (153523), 130 states have internal predecessors, (153523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:50:39,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:50:39,619 INFO L209 CegarLoopForPetriNet]: trace histogram [44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:50:39,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-11-20 11:50:39,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069efe18-3721-483d-a1dd-1fe4b3b92bb3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:50:39,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:50:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:50:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1402912853, now seen corresponding path program 1 times [2022-11-20 11:50:39,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:50:39,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325845185] [2022-11-20 11:50:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:50:39,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:50:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:50:39,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:50:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:50:40,053 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:50:40,053 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:50:40,053 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:50:40,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:50:40,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2022-11-20 11:50:40,053 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:50:40,054 WARN L233 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:50:40,054 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2022-11-20 11:50:40,162 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 11:50:40,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1346 places, 1525 transitions, 5162 flow