./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8 --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 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb --- 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-2329fc7 [2022-12-13 16:07:40,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:07:40,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:07:40,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:07:40,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:07:40,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:07:40,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:07:40,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:07:40,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:07:40,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:07:40,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:07:40,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:07:40,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:07:40,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:07:40,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:07:40,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:07:40,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:07:40,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:07:40,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:07:40,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:07:40,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:07:40,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:07:40,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:07:40,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:07:40,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:07:40,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:07:40,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:07:40,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:07:40,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:07:40,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:07:40,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:07:40,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:07:40,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:07:40,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:07:40,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:07:40,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:07:40,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:07:40,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:07:40,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:07:40,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:07:40,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:07:40,531 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:07:40,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:07:40,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:07:40,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:07:40,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:07:40,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:07:40,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:07:40,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:07:40,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:07:40,555 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:07:40,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:07:40,555 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:07:40,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:07:40,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:07:40,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:07:40,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:07:40,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:07:40,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:07:40,557 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:07:40,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:07:40,557 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:07:40,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:07:40,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:07:40,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:07:40,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:07:40,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:07:40,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:07:40,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:07:40,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:07:40,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:07:40,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:07:40,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:07:40,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:07:40,560 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:07:40,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:07:40,560 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:07:40,560 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb [2022-12-13 16:07:40,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:07:40,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:07:40,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:07:40,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:07:40,768 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:07:40,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2022-12-13 16:07:43,334 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:07:43,485 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:07:43,486 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2022-12-13 16:07:43,491 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/data/b514b5728/675a27e6bd7f403f85bc902fff82d074/FLAGeefae87c2 [2022-12-13 16:07:43,897 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/data/b514b5728/675a27e6bd7f403f85bc902fff82d074 [2022-12-13 16:07:43,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:07:43,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:07:43,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:07:43,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:07:43,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:07:43,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:07:43" (1/1) ... [2022-12-13 16:07:43,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46888cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:43, skipping insertion in model container [2022-12-13 16:07:43,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:07:43" (1/1) ... [2022-12-13 16:07:43,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:07:43,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:07:44,077 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_727a36f3-c9de-4407-a44f-4777184f43eb/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2022-12-13 16:07:44,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:07:44,090 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:07:44,118 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_727a36f3-c9de-4407-a44f-4777184f43eb/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2022-12-13 16:07:44,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:07:44,132 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:07:44,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44 WrapperNode [2022-12-13 16:07:44,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:07:44,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:07:44,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:07:44,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:07:44,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,172 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 574 [2022-12-13 16:07:44,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:07:44,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:07:44,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:07:44,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:07:44,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,200 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:07:44,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:07:44,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:07:44,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:07:44,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (1/1) ... [2022-12-13 16:07:44,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:07:44,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:07:44,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:07:44,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:07:44,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:07:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:07:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:07:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:07:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:07:44,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:07:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:07:44,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:07:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 16:07:44,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 16:07:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:07:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:07:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:07:44,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:07:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:07:44,269 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 16:07:44,366 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:07:44,368 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:07:44,913 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:07:44,923 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:07:44,923 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 16:07:44,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:07:44 BoogieIcfgContainer [2022-12-13 16:07:44,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:07:44,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:07:44,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:07:44,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:07:44,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:07:43" (1/3) ... [2022-12-13 16:07:44,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604760f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:07:44, skipping insertion in model container [2022-12-13 16:07:44,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:07:44" (2/3) ... [2022-12-13 16:07:44,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604760f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:07:44, skipping insertion in model container [2022-12-13 16:07:44,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:07:44" (3/3) ... [2022-12-13 16:07:44,932 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2022-12-13 16:07:44,940 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:07:44,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:07:44,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:07:44,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:07:45,071 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 16:07:45,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 698 places, 761 transitions, 1546 flow [2022-12-13 16:07:45,323 INFO L130 PetriNetUnfolder]: 73/758 cut-off events. [2022-12-13 16:07:45,323 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 16:07:45,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 758 events. 73/758 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2703 event pairs, 0 based on Foata normal form. 0/684 useless extension candidates. Maximal degree in co-relation 559. Up to 2 conditions per place. [2022-12-13 16:07:45,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 698 places, 761 transitions, 1546 flow [2022-12-13 16:07:45,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 747 transitions, 1512 flow [2022-12-13 16:07:45,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:07:45,360 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 684 places, 747 transitions, 1512 flow [2022-12-13 16:07:45,362 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 684 places, 747 transitions, 1512 flow [2022-12-13 16:07:45,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 747 transitions, 1512 flow [2022-12-13 16:07:45,512 INFO L130 PetriNetUnfolder]: 73/747 cut-off events. [2022-12-13 16:07:45,512 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 16:07:45,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 747 events. 73/747 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2706 event pairs, 0 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 559. Up to 2 conditions per place. [2022-12-13 16:07:45,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 187758 [2022-12-13 16:08:11,259 INFO L134 LiptonReduction]: Checked pairs total: 177790 [2022-12-13 16:08:11,259 INFO L136 LiptonReduction]: Total number of compositions: 950 [2022-12-13 16:08:11,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:08:11,274 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;@3cbdb620, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:08:11,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 16:08:11,281 INFO L130 PetriNetUnfolder]: 14/49 cut-off events. [2022-12-13 16:08:11,281 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 16:08:11,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:11,282 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:11,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2128296618, now seen corresponding path program 1 times [2022-12-13 16:08:11,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:11,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521703964] [2022-12-13 16:08:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:11,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:08:11,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:11,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521703964] [2022-12-13 16:08:11,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521703964] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:11,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:11,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:08:11,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832430952] [2022-12-13 16:08:11,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:11,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:08:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:11,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:08:11,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:08:11,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1711 [2022-12-13 16:08:11,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 711.3333333333334) internal successors, (2134), 3 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:11,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:11,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1711 [2022-12-13 16:08:11,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:12,326 INFO L130 PetriNetUnfolder]: 2862/3757 cut-off events. [2022-12-13 16:08:12,326 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2022-12-13 16:08:12,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7775 conditions, 3757 events. 2862/3757 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12980 event pairs, 1657 based on Foata normal form. 0/2552 useless extension candidates. Maximal degree in co-relation 7232. Up to 3755 conditions per place. [2022-12-13 16:08:12,339 INFO L137 encePairwiseOnDemand]: 1704/1711 looper letters, 47 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2022-12-13 16:08:12,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 230 flow [2022-12-13 16:08:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:08:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:08:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2171 transitions. [2022-12-13 16:08:12,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4229495421780635 [2022-12-13 16:08:12,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2171 transitions. [2022-12-13 16:08:12,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2171 transitions. [2022-12-13 16:08:12,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:12,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2171 transitions. [2022-12-13 16:08:12,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 723.6666666666666) internal successors, (2171), 3 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:12,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:12,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:12,384 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 118 flow. Second operand 3 states and 2171 transitions. [2022-12-13 16:08:12,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 230 flow [2022-12-13 16:08:12,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 218 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 16:08:12,391 INFO L231 Difference]: Finished difference. Result has 43 places, 53 transitions, 138 flow [2022-12-13 16:08:12,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=43, PETRI_TRANSITIONS=53} [2022-12-13 16:08:12,395 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2022-12-13 16:08:12,395 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 53 transitions, 138 flow [2022-12-13 16:08:12,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 711.3333333333334) internal successors, (2134), 3 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:12,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:12,396 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] [2022-12-13 16:08:12,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:08:12,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1266410094, now seen corresponding path program 1 times [2022-12-13 16:08:12,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:12,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673476404] [2022-12-13 16:08:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:12,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:08:12,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673476404] [2022-12-13 16:08:12,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673476404] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607301032] [2022-12-13 16:08:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:12,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:12,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:12,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:08:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:12,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:08:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:08:12,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:08:12,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607301032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:12,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:12,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 16:08:12,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133881861] [2022-12-13 16:08:12,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:12,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:08:12,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:08:12,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:08:12,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 699 out of 1711 [2022-12-13 16:08:12,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 53 transitions, 138 flow. Second operand has 8 states, 8 states have (on average 702.5) internal successors, (5620), 8 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:12,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:12,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 699 of 1711 [2022-12-13 16:08:12,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:13,580 INFO L130 PetriNetUnfolder]: 2862/3766 cut-off events. [2022-12-13 16:08:13,581 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 16:08:13,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7669 conditions, 3766 events. 2862/3766 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12978 event pairs, 1657 based on Foata normal form. 6/2569 useless extension candidates. Maximal degree in co-relation 7620. Up to 3755 conditions per place. [2022-12-13 16:08:13,592 INFO L137 encePairwiseOnDemand]: 1704/1711 looper letters, 47 selfloop transitions, 15 changer transitions 0/62 dead transitions. [2022-12-13 16:08:13,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 298 flow [2022-12-13 16:08:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:08:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:08:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4265 transitions. [2022-12-13 16:08:13,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4154490551334502 [2022-12-13 16:08:13,599 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4265 transitions. [2022-12-13 16:08:13,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4265 transitions. [2022-12-13 16:08:13,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:13,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4265 transitions. [2022-12-13 16:08:13,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 710.8333333333334) internal successors, (4265), 6 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:13,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1711.0) internal successors, (11977), 7 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:13,621 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1711.0) internal successors, (11977), 7 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:13,621 INFO L175 Difference]: Start difference. First operand has 43 places, 53 transitions, 138 flow. Second operand 6 states and 4265 transitions. [2022-12-13 16:08:13,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 298 flow [2022-12-13 16:08:13,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:13,622 INFO L231 Difference]: Finished difference. Result has 50 places, 62 transitions, 228 flow [2022-12-13 16:08:13,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=50, PETRI_TRANSITIONS=62} [2022-12-13 16:08:13,623 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2022-12-13 16:08:13,623 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 62 transitions, 228 flow [2022-12-13 16:08:13,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 702.5) internal successors, (5620), 8 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:13,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:13,625 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:13,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:08:13,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 16:08:13,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:13,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1185884530, now seen corresponding path program 2 times [2022-12-13 16:08:13,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:13,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829849460] [2022-12-13 16:08:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:13,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 16:08:14,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829849460] [2022-12-13 16:08:14,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829849460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290636844] [2022-12-13 16:08:14,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:08:14,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:14,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:14,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:08:14,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:08:14,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:08:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:08:14,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:08:15,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:08:15,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290636844] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:15,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:08:15,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 16:08:15,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695027288] [2022-12-13 16:08:15,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:15,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:08:15,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:15,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:08:15,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:08:15,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 683 out of 1711 [2022-12-13 16:08:15,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 687.4) internal successors, (3437), 5 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:15,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:15,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 683 of 1711 [2022-12-13 16:08:15,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:16,972 INFO L130 PetriNetUnfolder]: 3216/4299 cut-off events. [2022-12-13 16:08:16,973 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 16:08:16,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8777 conditions, 4299 events. 3216/4299 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16155 event pairs, 1657 based on Foata normal form. 1/2930 useless extension candidates. Maximal degree in co-relation 8689. Up to 3685 conditions per place. [2022-12-13 16:08:16,986 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 101 selfloop transitions, 2 changer transitions 7/110 dead transitions. [2022-12-13 16:08:16,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 110 transitions, 556 flow [2022-12-13 16:08:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:08:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:08:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3514 transitions. [2022-12-13 16:08:16,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41075394506136764 [2022-12-13 16:08:16,991 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3514 transitions. [2022-12-13 16:08:16,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3514 transitions. [2022-12-13 16:08:16,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:16,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3514 transitions. [2022-12-13 16:08:16,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 702.8) internal successors, (3514), 5 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:17,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:17,007 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:17,007 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 228 flow. Second operand 5 states and 3514 transitions. [2022-12-13 16:08:17,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 110 transitions, 556 flow [2022-12-13 16:08:17,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 110 transitions, 532 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:17,009 INFO L231 Difference]: Finished difference. Result has 56 places, 63 transitions, 219 flow [2022-12-13 16:08:17,009 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=56, PETRI_TRANSITIONS=63} [2022-12-13 16:08:17,010 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2022-12-13 16:08:17,010 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 63 transitions, 219 flow [2022-12-13 16:08:17,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 687.4) internal successors, (3437), 5 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:17,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:17,011 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:17,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:08:17,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:17,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:17,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1084175334, now seen corresponding path program 3 times [2022-12-13 16:08:17,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:17,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14034737] [2022-12-13 16:08:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 16:08:17,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:17,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14034737] [2022-12-13 16:08:17,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14034737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:17,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257594945] [2022-12-13 16:08:17,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:08:17,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:17,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:17,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:17,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:08:17,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 16:08:17,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:08:17,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:08:17,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 16:08:18,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:08:18,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257594945] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:18,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:08:18,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 16:08:18,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933954884] [2022-12-13 16:08:18,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:18,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:08:18,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:18,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:08:18,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:08:18,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 683 out of 1711 [2022-12-13 16:08:18,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 63 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 687.4) internal successors, (3437), 5 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:18,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:18,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 683 of 1711 [2022-12-13 16:08:18,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:19,935 INFO L130 PetriNetUnfolder]: 3416/4649 cut-off events. [2022-12-13 16:08:19,935 INFO L131 PetriNetUnfolder]: For 705/705 co-relation queries the response was YES. [2022-12-13 16:08:19,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9987 conditions, 4649 events. 3416/4649 cut-off events. For 705/705 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18700 event pairs, 1919 based on Foata normal form. 1/3672 useless extension candidates. Maximal degree in co-relation 9955. Up to 4151 conditions per place. [2022-12-13 16:08:19,946 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 105 selfloop transitions, 3 changer transitions 7/115 dead transitions. [2022-12-13 16:08:19,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 115 transitions, 575 flow [2022-12-13 16:08:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:08:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:08:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3518 transitions. [2022-12-13 16:08:19,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41122150789012274 [2022-12-13 16:08:19,953 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3518 transitions. [2022-12-13 16:08:19,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3518 transitions. [2022-12-13 16:08:19,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:19,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3518 transitions. [2022-12-13 16:08:19,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 703.6) internal successors, (3518), 5 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:19,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:19,975 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:19,976 INFO L175 Difference]: Start difference. First operand has 56 places, 63 transitions, 219 flow. Second operand 5 states and 3518 transitions. [2022-12-13 16:08:19,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 115 transitions, 575 flow [2022-12-13 16:08:19,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 115 transitions, 566 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 16:08:19,979 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 236 flow [2022-12-13 16:08:19,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2022-12-13 16:08:19,980 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2022-12-13 16:08:19,980 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 236 flow [2022-12-13 16:08:19,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 687.4) internal successors, (3437), 5 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:19,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:19,981 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:19,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:08:20,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:20,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1941382870, now seen corresponding path program 4 times [2022-12-13 16:08:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:20,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583728117] [2022-12-13 16:08:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:20,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 16:08:20,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:20,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583728117] [2022-12-13 16:08:20,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583728117] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:20,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081151552] [2022-12-13 16:08:20,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:08:20,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:20,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:20,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:20,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:08:20,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:08:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:08:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:08:20,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 16:08:20,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 16:08:20,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081151552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:20,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:20,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-13 16:08:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016671563] [2022-12-13 16:08:20,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:20,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 16:08:20,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:20,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 16:08:20,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-12-13 16:08:20,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 699 out of 1711 [2022-12-13 16:08:20,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 236 flow. Second operand has 17 states, 17 states have (on average 701.1764705882352) internal successors, (11920), 17 states have internal predecessors, (11920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:20,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:20,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 699 of 1711 [2022-12-13 16:08:20,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:21,737 INFO L130 PetriNetUnfolder]: 3415/4644 cut-off events. [2022-12-13 16:08:21,737 INFO L131 PetriNetUnfolder]: For 1830/1830 co-relation queries the response was YES. [2022-12-13 16:08:21,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10497 conditions, 4644 events. 3415/4644 cut-off events. For 1830/1830 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18329 event pairs, 2136 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 10463. Up to 4630 conditions per place. [2022-12-13 16:08:21,750 INFO L137 encePairwiseOnDemand]: 1704/1711 looper letters, 49 selfloop transitions, 18 changer transitions 0/67 dead transitions. [2022-12-13 16:08:21,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 388 flow [2022-12-13 16:08:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:08:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:08:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4961 transitions. [2022-12-13 16:08:21,767 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41421057025966435 [2022-12-13 16:08:21,767 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4961 transitions. [2022-12-13 16:08:21,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4961 transitions. [2022-12-13 16:08:21,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:21,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4961 transitions. [2022-12-13 16:08:21,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 708.7142857142857) internal successors, (4961), 7 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:21,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1711.0) internal successors, (13688), 8 states have internal predecessors, (13688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:21,786 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1711.0) internal successors, (13688), 8 states have internal predecessors, (13688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:21,786 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 236 flow. Second operand 7 states and 4961 transitions. [2022-12-13 16:08:21,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 388 flow [2022-12-13 16:08:21,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 67 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 16:08:21,790 INFO L231 Difference]: Finished difference. Result has 64 places, 67 transitions, 298 flow [2022-12-13 16:08:21,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=298, PETRI_PLACES=64, PETRI_TRANSITIONS=67} [2022-12-13 16:08:21,790 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2022-12-13 16:08:21,790 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 67 transitions, 298 flow [2022-12-13 16:08:21,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 701.1764705882352) internal successors, (11920), 17 states have internal predecessors, (11920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:21,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:21,794 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:21,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:08:21,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:21,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:21,995 INFO L85 PathProgramCache]: Analyzing trace with hash -753366812, now seen corresponding path program 5 times [2022-12-13 16:08:21,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:21,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412899894] [2022-12-13 16:08:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:21,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:22,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:22,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412899894] [2022-12-13 16:08:22,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412899894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:22,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:22,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:08:22,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950934430] [2022-12-13 16:08:22,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:22,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:08:22,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:22,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:08:22,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:08:23,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 680 out of 1711 [2022-12-13 16:08:23,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 67 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 684.4) internal successors, (3422), 5 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:23,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:23,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 680 of 1711 [2022-12-13 16:08:23,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:25,669 INFO L130 PetriNetUnfolder]: 8951/12077 cut-off events. [2022-12-13 16:08:25,669 INFO L131 PetriNetUnfolder]: For 1940/1940 co-relation queries the response was YES. [2022-12-13 16:08:25,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25833 conditions, 12077 events. 8951/12077 cut-off events. For 1940/1940 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 58285 event pairs, 1312 based on Foata normal form. 1/9128 useless extension candidates. Maximal degree in co-relation 25720. Up to 4173 conditions per place. [2022-12-13 16:08:25,699 INFO L137 encePairwiseOnDemand]: 1698/1711 looper letters, 176 selfloop transitions, 44 changer transitions 1/221 dead transitions. [2022-12-13 16:08:25,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 221 transitions, 1116 flow [2022-12-13 16:08:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:08:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 16:08:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4962 transitions. [2022-12-13 16:08:25,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41429406362194204 [2022-12-13 16:08:25,706 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4962 transitions. [2022-12-13 16:08:25,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4962 transitions. [2022-12-13 16:08:25,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:25,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4962 transitions. [2022-12-13 16:08:25,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 708.8571428571429) internal successors, (4962), 7 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:25,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1711.0) internal successors, (13688), 8 states have internal predecessors, (13688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:25,720 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1711.0) internal successors, (13688), 8 states have internal predecessors, (13688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:25,720 INFO L175 Difference]: Start difference. First operand has 64 places, 67 transitions, 298 flow. Second operand 7 states and 4962 transitions. [2022-12-13 16:08:25,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 221 transitions, 1116 flow [2022-12-13 16:08:25,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 221 transitions, 1080 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-13 16:08:25,727 INFO L231 Difference]: Finished difference. Result has 71 places, 113 transitions, 602 flow [2022-12-13 16:08:25,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=602, PETRI_PLACES=71, PETRI_TRANSITIONS=113} [2022-12-13 16:08:25,727 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2022-12-13 16:08:25,727 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 113 transitions, 602 flow [2022-12-13 16:08:25,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 684.4) internal successors, (3422), 5 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:25,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:25,728 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:25,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:08:25,728 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash 114402598, now seen corresponding path program 6 times [2022-12-13 16:08:25,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:25,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20610004] [2022-12-13 16:08:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:26,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:26,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20610004] [2022-12-13 16:08:26,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20610004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:26,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:26,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:08:26,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507468664] [2022-12-13 16:08:26,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:26,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:08:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:08:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:08:26,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 680 out of 1711 [2022-12-13 16:08:26,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 113 transitions, 602 flow. Second operand has 5 states, 5 states have (on average 684.4) internal successors, (3422), 5 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:26,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:26,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 680 of 1711 [2022-12-13 16:08:26,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:29,672 INFO L130 PetriNetUnfolder]: 11808/15925 cut-off events. [2022-12-13 16:08:29,672 INFO L131 PetriNetUnfolder]: For 10736/10736 co-relation queries the response was YES. [2022-12-13 16:08:29,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44448 conditions, 15925 events. 11808/15925 cut-off events. For 10736/10736 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 78854 event pairs, 3329 based on Foata normal form. 1/12238 useless extension candidates. Maximal degree in co-relation 44348. Up to 7824 conditions per place. [2022-12-13 16:08:29,722 INFO L137 encePairwiseOnDemand]: 1698/1711 looper letters, 166 selfloop transitions, 56 changer transitions 2/224 dead transitions. [2022-12-13 16:08:29,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 224 transitions, 1492 flow [2022-12-13 16:08:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:08:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:08:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3530 transitions. [2022-12-13 16:08:29,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4126241963763881 [2022-12-13 16:08:29,727 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3530 transitions. [2022-12-13 16:08:29,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3530 transitions. [2022-12-13 16:08:29,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:29,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3530 transitions. [2022-12-13 16:08:29,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 706.0) internal successors, (3530), 5 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:29,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:29,736 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:29,737 INFO L175 Difference]: Start difference. First operand has 71 places, 113 transitions, 602 flow. Second operand 5 states and 3530 transitions. [2022-12-13 16:08:29,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 224 transitions, 1492 flow [2022-12-13 16:08:29,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 224 transitions, 1484 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 16:08:29,810 INFO L231 Difference]: Finished difference. Result has 79 places, 157 transitions, 1126 flow [2022-12-13 16:08:29,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1126, PETRI_PLACES=79, PETRI_TRANSITIONS=157} [2022-12-13 16:08:29,810 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2022-12-13 16:08:29,811 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 157 transitions, 1126 flow [2022-12-13 16:08:29,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 684.4) internal successors, (3422), 5 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:29,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:29,811 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:29,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:08:29,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1927493174, now seen corresponding path program 7 times [2022-12-13 16:08:29,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:29,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641891027] [2022-12-13 16:08:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:29,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:30,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:30,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641891027] [2022-12-13 16:08:30,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641891027] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:30,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:30,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:08:30,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289080191] [2022-12-13 16:08:30,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:30,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:08:30,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:30,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:08:30,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:08:31,085 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 680 out of 1711 [2022-12-13 16:08:31,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 157 transitions, 1126 flow. Second operand has 5 states, 5 states have (on average 684.4) internal successors, (3422), 5 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:31,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:31,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 680 of 1711 [2022-12-13 16:08:31,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:34,282 INFO L130 PetriNetUnfolder]: 12267/16606 cut-off events. [2022-12-13 16:08:34,282 INFO L131 PetriNetUnfolder]: For 20455/20455 co-relation queries the response was YES. [2022-12-13 16:08:34,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51501 conditions, 16606 events. 12267/16606 cut-off events. For 20455/20455 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 83589 event pairs, 5011 based on Foata normal form. 1/12771 useless extension candidates. Maximal degree in co-relation 51397. Up to 13118 conditions per place. [2022-12-13 16:08:34,340 INFO L137 encePairwiseOnDemand]: 1699/1711 looper letters, 218 selfloop transitions, 48 changer transitions 2/268 dead transitions. [2022-12-13 16:08:34,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 268 transitions, 2241 flow [2022-12-13 16:08:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:08:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:08:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3533 transitions. [2022-12-13 16:08:34,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4129748684979544 [2022-12-13 16:08:34,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3533 transitions. [2022-12-13 16:08:34,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3533 transitions. [2022-12-13 16:08:34,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:34,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3533 transitions. [2022-12-13 16:08:34,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 706.6) internal successors, (3533), 5 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:34,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:34,354 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:34,354 INFO L175 Difference]: Start difference. First operand has 79 places, 157 transitions, 1126 flow. Second operand 5 states and 3533 transitions. [2022-12-13 16:08:34,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 268 transitions, 2241 flow [2022-12-13 16:08:34,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 268 transitions, 2229 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 16:08:34,493 INFO L231 Difference]: Finished difference. Result has 86 places, 187 transitions, 1609 flow [2022-12-13 16:08:34,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1609, PETRI_PLACES=86, PETRI_TRANSITIONS=187} [2022-12-13 16:08:34,493 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2022-12-13 16:08:34,493 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 187 transitions, 1609 flow [2022-12-13 16:08:34,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 684.4) internal successors, (3422), 5 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:34,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:34,494 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:34,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:08:34,494 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash 632132368, now seen corresponding path program 8 times [2022-12-13 16:08:34,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:34,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141245424] [2022-12-13 16:08:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:34,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:35,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:35,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141245424] [2022-12-13 16:08:35,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141245424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:35,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:35,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:08:35,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503206784] [2022-12-13 16:08:35,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:35,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:08:35,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:35,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:08:35,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:08:35,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 680 out of 1711 [2022-12-13 16:08:35,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 187 transitions, 1609 flow. Second operand has 5 states, 5 states have (on average 684.4) internal successors, (3422), 5 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:35,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:35,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 680 of 1711 [2022-12-13 16:08:35,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:38,805 INFO L130 PetriNetUnfolder]: 12445/16874 cut-off events. [2022-12-13 16:08:38,805 INFO L131 PetriNetUnfolder]: For 31754/31754 co-relation queries the response was YES. [2022-12-13 16:08:38,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57347 conditions, 16874 events. 12445/16874 cut-off events. For 31754/31754 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 85793 event pairs, 3040 based on Foata normal form. 1/12969 useless extension candidates. Maximal degree in co-relation 57239. Up to 8142 conditions per place. [2022-12-13 16:08:38,880 INFO L137 encePairwiseOnDemand]: 1699/1711 looper letters, 212 selfloop transitions, 49 changer transitions 2/263 dead transitions. [2022-12-13 16:08:38,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 263 transitions, 2474 flow [2022-12-13 16:08:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:08:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:08:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3532 transitions. [2022-12-13 16:08:38,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4128579777907656 [2022-12-13 16:08:38,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3532 transitions. [2022-12-13 16:08:38,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3532 transitions. [2022-12-13 16:08:38,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:38,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3532 transitions. [2022-12-13 16:08:38,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 706.4) internal successors, (3532), 5 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:38,898 INFO L175 Difference]: Start difference. First operand has 86 places, 187 transitions, 1609 flow. Second operand 5 states and 3532 transitions. [2022-12-13 16:08:38,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 263 transitions, 2474 flow [2022-12-13 16:08:39,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 263 transitions, 2466 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 16:08:39,260 INFO L231 Difference]: Finished difference. Result has 92 places, 197 transitions, 1866 flow [2022-12-13 16:08:39,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1866, PETRI_PLACES=92, PETRI_TRANSITIONS=197} [2022-12-13 16:08:39,261 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2022-12-13 16:08:39,261 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 197 transitions, 1866 flow [2022-12-13 16:08:39,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 684.4) internal successors, (3422), 5 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:39,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:39,262 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:39,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:08:39,262 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:39,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1832653079, now seen corresponding path program 1 times [2022-12-13 16:08:39,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:39,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529251095] [2022-12-13 16:08:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:39,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:39,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:39,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529251095] [2022-12-13 16:08:39,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529251095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:39,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:39,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:08:39,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654910325] [2022-12-13 16:08:39,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:39,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:08:39,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:39,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:08:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:08:39,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 1711 [2022-12-13 16:08:39,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 197 transitions, 1866 flow. Second operand has 3 states, 3 states have (on average 717.6666666666666) internal successors, (2153), 3 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:39,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:39,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 1711 [2022-12-13 16:08:39,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:43,382 INFO L130 PetriNetUnfolder]: 17520/23760 cut-off events. [2022-12-13 16:08:43,382 INFO L131 PetriNetUnfolder]: For 54533/54533 co-relation queries the response was YES. [2022-12-13 16:08:43,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84805 conditions, 23760 events. 17520/23760 cut-off events. For 54533/54533 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 124619 event pairs, 5825 based on Foata normal form. 280/18540 useless extension candidates. Maximal degree in co-relation 84694. Up to 15285 conditions per place. [2022-12-13 16:08:43,487 INFO L137 encePairwiseOnDemand]: 1706/1711 looper letters, 273 selfloop transitions, 12 changer transitions 0/285 dead transitions. [2022-12-13 16:08:43,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 285 transitions, 3216 flow [2022-12-13 16:08:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:08:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:08:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2212 transitions. [2022-12-13 16:08:43,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43093707383596336 [2022-12-13 16:08:43,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2212 transitions. [2022-12-13 16:08:43,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2212 transitions. [2022-12-13 16:08:43,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:43,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2212 transitions. [2022-12-13 16:08:43,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 737.3333333333334) internal successors, (2212), 3 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:43,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:43,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:43,496 INFO L175 Difference]: Start difference. First operand has 92 places, 197 transitions, 1866 flow. Second operand 3 states and 2212 transitions. [2022-12-13 16:08:43,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 285 transitions, 3216 flow [2022-12-13 16:08:44,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 285 transitions, 3110 flow, removed 20 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:44,078 INFO L231 Difference]: Finished difference. Result has 94 places, 187 transitions, 1713 flow [2022-12-13 16:08:44,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1713, PETRI_PLACES=94, PETRI_TRANSITIONS=187} [2022-12-13 16:08:44,079 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2022-12-13 16:08:44,079 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 187 transitions, 1713 flow [2022-12-13 16:08:44,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 717.6666666666666) internal successors, (2153), 3 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:44,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:44,079 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:44,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 16:08:44,080 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash 234048729, now seen corresponding path program 1 times [2022-12-13 16:08:44,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:44,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653945349] [2022-12-13 16:08:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:44,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:44,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:44,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653945349] [2022-12-13 16:08:44,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653945349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:44,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:44,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:08:44,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763950418] [2022-12-13 16:08:44,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:44,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:08:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:44,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:08:44,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:08:44,207 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 1711 [2022-12-13 16:08:44,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 187 transitions, 1713 flow. Second operand has 3 states, 3 states have (on average 717.6666666666666) internal successors, (2153), 3 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:44,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:44,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 1711 [2022-12-13 16:08:44,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:48,894 INFO L130 PetriNetUnfolder]: 18568/25414 cut-off events. [2022-12-13 16:08:48,894 INFO L131 PetriNetUnfolder]: For 58323/58323 co-relation queries the response was YES. [2022-12-13 16:08:48,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88720 conditions, 25414 events. 18568/25414 cut-off events. For 58323/58323 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 138337 event pairs, 7763 based on Foata normal form. 0/20282 useless extension candidates. Maximal degree in co-relation 88608. Up to 21003 conditions per place. [2022-12-13 16:08:49,018 INFO L137 encePairwiseOnDemand]: 1708/1711 looper letters, 207 selfloop transitions, 19 changer transitions 0/226 dead transitions. [2022-12-13 16:08:49,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 226 transitions, 2371 flow [2022-12-13 16:08:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:08:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:08:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2214 transitions. [2022-12-13 16:08:49,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43132670952659263 [2022-12-13 16:08:49,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2214 transitions. [2022-12-13 16:08:49,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2214 transitions. [2022-12-13 16:08:49,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:49,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2214 transitions. [2022-12-13 16:08:49,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,027 INFO L175 Difference]: Start difference. First operand has 94 places, 187 transitions, 1713 flow. Second operand 3 states and 2214 transitions. [2022-12-13 16:08:49,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 226 transitions, 2371 flow [2022-12-13 16:08:49,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 226 transitions, 2356 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:49,755 INFO L231 Difference]: Finished difference. Result has 96 places, 180 transitions, 1681 flow [2022-12-13 16:08:49,755 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1681, PETRI_PLACES=96, PETRI_TRANSITIONS=180} [2022-12-13 16:08:49,755 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2022-12-13 16:08:49,755 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 180 transitions, 1681 flow [2022-12-13 16:08:49,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 717.6666666666666) internal successors, (2153), 3 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,756 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:49,756 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:49,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:08:49,756 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:49,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:49,756 INFO L85 PathProgramCache]: Analyzing trace with hash -307613998, now seen corresponding path program 1 times [2022-12-13 16:08:49,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:49,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951324529] [2022-12-13 16:08:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:49,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:49,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:49,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951324529] [2022-12-13 16:08:49,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951324529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:08:49,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:08:49,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:08:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64145177] [2022-12-13 16:08:49,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:08:49,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:08:49,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:08:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:08:49,879 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 1711 [2022-12-13 16:08:49,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 180 transitions, 1681 flow. Second operand has 3 states, 3 states have (on average 717.6666666666666) internal successors, (2153), 3 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:49,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:49,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 1711 [2022-12-13 16:08:49,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:08:56,357 INFO L130 PetriNetUnfolder]: 27542/37436 cut-off events. [2022-12-13 16:08:56,357 INFO L131 PetriNetUnfolder]: For 105328/105328 co-relation queries the response was YES. [2022-12-13 16:08:56,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133601 conditions, 37436 events. 27542/37436 cut-off events. For 105328/105328 co-relation queries the response was YES. Maximal size of possible extension queue 1114. Compared 209039 event pairs, 10459 based on Foata normal form. 0/30092 useless extension candidates. Maximal degree in co-relation 133488. Up to 26113 conditions per place. [2022-12-13 16:08:56,549 INFO L137 encePairwiseOnDemand]: 1706/1711 looper letters, 237 selfloop transitions, 9 changer transitions 0/246 dead transitions. [2022-12-13 16:08:56,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 246 transitions, 2653 flow [2022-12-13 16:08:56,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:08:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:08:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2212 transitions. [2022-12-13 16:08:56,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43093707383596336 [2022-12-13 16:08:56,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2212 transitions. [2022-12-13 16:08:56,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2212 transitions. [2022-12-13 16:08:56,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:08:56,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2212 transitions. [2022-12-13 16:08:56,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 737.3333333333334) internal successors, (2212), 3 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:56,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:56,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:56,558 INFO L175 Difference]: Start difference. First operand has 96 places, 180 transitions, 1681 flow. Second operand 3 states and 2212 transitions. [2022-12-13 16:08:56,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 246 transitions, 2653 flow [2022-12-13 16:08:57,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 246 transitions, 2604 flow, removed 13 selfloop flow, removed 1 redundant places. [2022-12-13 16:08:57,539 INFO L231 Difference]: Finished difference. Result has 98 places, 182 transitions, 1679 flow [2022-12-13 16:08:57,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1679, PETRI_PLACES=98, PETRI_TRANSITIONS=182} [2022-12-13 16:08:57,540 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2022-12-13 16:08:57,540 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 182 transitions, 1679 flow [2022-12-13 16:08:57,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 717.6666666666666) internal successors, (2153), 3 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:57,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:08:57,541 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:08:57,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 16:08:57,541 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:08:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:08:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash 423389166, now seen corresponding path program 1 times [2022-12-13 16:08:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:08:57,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54585526] [2022-12-13 16:08:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:57,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:08:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:57,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:08:57,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54585526] [2022-12-13 16:08:57,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54585526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:08:57,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529661133] [2022-12-13 16:08:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:08:57,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:08:57,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:08:57,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:08:57,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:08:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:08:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 16:08:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:08:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:57,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:08:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:08:58,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529661133] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:08:58,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:08:58,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 16:08:58,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890747586] [2022-12-13 16:08:58,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:08:58,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:08:58,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:08:58,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:08:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:08:58,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 704 out of 1711 [2022-12-13 16:08:58,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 182 transitions, 1679 flow. Second operand has 6 states, 6 states have (on average 711.0) internal successors, (4266), 6 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:08:58,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:08:58,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 704 of 1711 [2022-12-13 16:08:58,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:04,975 INFO L130 PetriNetUnfolder]: 28320/38610 cut-off events. [2022-12-13 16:09:04,975 INFO L131 PetriNetUnfolder]: For 98876/98876 co-relation queries the response was YES. [2022-12-13 16:09:05,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138300 conditions, 38610 events. 28320/38610 cut-off events. For 98876/98876 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 216739 event pairs, 8591 based on Foata normal form. 4/31978 useless extension candidates. Maximal degree in co-relation 138186. Up to 34622 conditions per place. [2022-12-13 16:09:05,168 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 201 selfloop transitions, 12 changer transitions 62/275 dead transitions. [2022-12-13 16:09:05,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 275 transitions, 2924 flow [2022-12-13 16:09:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:09:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:09:05,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2918 transitions. [2022-12-13 16:09:05,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4263588544710695 [2022-12-13 16:09:05,172 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2918 transitions. [2022-12-13 16:09:05,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2918 transitions. [2022-12-13 16:09:05,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:05,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2918 transitions. [2022-12-13 16:09:05,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 729.5) internal successors, (2918), 4 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:05,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:05,179 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:05,179 INFO L175 Difference]: Start difference. First operand has 98 places, 182 transitions, 1679 flow. Second operand 4 states and 2918 transitions. [2022-12-13 16:09:05,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 275 transitions, 2924 flow [2022-12-13 16:09:06,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 275 transitions, 2910 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:09:06,336 INFO L231 Difference]: Finished difference. Result has 103 places, 171 transitions, 1621 flow [2022-12-13 16:09:06,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1621, PETRI_PLACES=103, PETRI_TRANSITIONS=171} [2022-12-13 16:09:06,337 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2022-12-13 16:09:06,337 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 171 transitions, 1621 flow [2022-12-13 16:09:06,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 711.0) internal successors, (4266), 6 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:06,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:06,337 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:09:06,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:09:06,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:09:06,538 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:09:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1471706718, now seen corresponding path program 2 times [2022-12-13 16:09:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:06,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529940422] [2022-12-13 16:09:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:09:06,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:06,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529940422] [2022-12-13 16:09:06,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529940422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:06,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:06,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:09:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163064403] [2022-12-13 16:09:06,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:06,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:09:06,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:09:06,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:09:06,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 699 out of 1711 [2022-12-13 16:09:06,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 171 transitions, 1621 flow. Second operand has 5 states, 5 states have (on average 703.8) internal successors, (3519), 5 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:06,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:06,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 699 of 1711 [2022-12-13 16:09:06,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:14,002 INFO L130 PetriNetUnfolder]: 30191/41561 cut-off events. [2022-12-13 16:09:14,002 INFO L131 PetriNetUnfolder]: For 97804/97804 co-relation queries the response was YES. [2022-12-13 16:09:14,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144186 conditions, 41561 events. 30191/41561 cut-off events. For 97804/97804 co-relation queries the response was YES. Maximal size of possible extension queue 1265. Compared 242773 event pairs, 12975 based on Foata normal form. 4/34617 useless extension candidates. Maximal degree in co-relation 144084. Up to 32430 conditions per place. [2022-12-13 16:09:14,249 INFO L137 encePairwiseOnDemand]: 1701/1711 looper letters, 240 selfloop transitions, 24 changer transitions 43/307 dead transitions. [2022-12-13 16:09:14,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 307 transitions, 3024 flow [2022-12-13 16:09:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3644 transitions. [2022-12-13 16:09:14,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4259497369959088 [2022-12-13 16:09:14,254 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3644 transitions. [2022-12-13 16:09:14,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3644 transitions. [2022-12-13 16:09:14,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:14,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3644 transitions. [2022-12-13 16:09:14,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 728.8) internal successors, (3644), 5 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:14,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:14,264 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:14,264 INFO L175 Difference]: Start difference. First operand has 103 places, 171 transitions, 1621 flow. Second operand 5 states and 3644 transitions. [2022-12-13 16:09:14,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 307 transitions, 3024 flow [2022-12-13 16:09:15,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 307 transitions, 2987 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-12-13 16:09:15,703 INFO L231 Difference]: Finished difference. Result has 108 places, 165 transitions, 1533 flow [2022-12-13 16:09:15,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1533, PETRI_PLACES=108, PETRI_TRANSITIONS=165} [2022-12-13 16:09:15,703 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2022-12-13 16:09:15,703 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 165 transitions, 1533 flow [2022-12-13 16:09:15,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 703.8) internal successors, (3519), 5 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:15,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:15,704 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:09:15,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 16:09:15,704 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:09:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash 750983151, now seen corresponding path program 1 times [2022-12-13 16:09:15,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:15,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989851014] [2022-12-13 16:09:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:15,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:09:15,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:15,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989851014] [2022-12-13 16:09:15,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989851014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:15,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:15,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:15,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810011048] [2022-12-13 16:09:15,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:15,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:09:15,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:09:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:15,879 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1711 [2022-12-13 16:09:15,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 165 transitions, 1533 flow. Second operand has 3 states, 3 states have (on average 714.3333333333334) internal successors, (2143), 3 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:15,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:15,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1711 [2022-12-13 16:09:15,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:25,099 INFO L130 PetriNetUnfolder]: 40436/55673 cut-off events. [2022-12-13 16:09:25,100 INFO L131 PetriNetUnfolder]: For 142216/142216 co-relation queries the response was YES. [2022-12-13 16:09:25,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199945 conditions, 55673 events. 40436/55673 cut-off events. For 142216/142216 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 337940 event pairs, 13758 based on Foata normal form. 0/47148 useless extension candidates. Maximal degree in co-relation 199827. Up to 36478 conditions per place. [2022-12-13 16:09:25,451 INFO L137 encePairwiseOnDemand]: 1705/1711 looper letters, 248 selfloop transitions, 5 changer transitions 0/253 dead transitions. [2022-12-13 16:09:25,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 253 transitions, 2862 flow [2022-12-13 16:09:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:09:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:09:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2194 transitions. [2022-12-13 16:09:25,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42743035262030005 [2022-12-13 16:09:25,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2194 transitions. [2022-12-13 16:09:25,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2194 transitions. [2022-12-13 16:09:25,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:25,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2194 transitions. [2022-12-13 16:09:25,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:25,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:25,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1711.0) internal successors, (6844), 4 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:25,460 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 1533 flow. Second operand 3 states and 2194 transitions. [2022-12-13 16:09:25,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 253 transitions, 2862 flow [2022-12-13 16:09:28,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 253 transitions, 2762 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-12-13 16:09:28,105 INFO L231 Difference]: Finished difference. Result has 105 places, 169 transitions, 1509 flow [2022-12-13 16:09:28,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1509, PETRI_PLACES=105, PETRI_TRANSITIONS=169} [2022-12-13 16:09:28,106 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2022-12-13 16:09:28,106 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 169 transitions, 1509 flow [2022-12-13 16:09:28,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 714.3333333333334) internal successors, (2143), 3 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:28,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:28,106 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:09:28,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 16:09:28,106 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:09:28,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:28,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1975953391, now seen corresponding path program 2 times [2022-12-13 16:09:28,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:28,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582838140] [2022-12-13 16:09:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:28,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:09:28,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:28,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582838140] [2022-12-13 16:09:28,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582838140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:28,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:28,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:09:28,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873602620] [2022-12-13 16:09:28,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:28,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:09:28,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:28,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:09:28,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:09:28,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 697 out of 1711 [2022-12-13 16:09:28,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 169 transitions, 1509 flow. Second operand has 5 states, 5 states have (on average 702.6) internal successors, (3513), 5 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) [2022-12-13 16:09:28,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:28,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 697 of 1711 [2022-12-13 16:09:28,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:09:39,444 INFO L130 PetriNetUnfolder]: 48382/66549 cut-off events. [2022-12-13 16:09:39,444 INFO L131 PetriNetUnfolder]: For 166477/166477 co-relation queries the response was YES. [2022-12-13 16:09:39,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247570 conditions, 66549 events. 48382/66549 cut-off events. For 166477/166477 co-relation queries the response was YES. Maximal size of possible extension queue 1873. Compared 407906 event pairs, 16150 based on Foata normal form. 807/61560 useless extension candidates. Maximal degree in co-relation 247456. Up to 33307 conditions per place. [2022-12-13 16:09:39,850 INFO L137 encePairwiseOnDemand]: 1704/1711 looper letters, 241 selfloop transitions, 8 changer transitions 0/249 dead transitions. [2022-12-13 16:09:39,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 249 transitions, 2740 flow [2022-12-13 16:09:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:09:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:09:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3564 transitions. [2022-12-13 16:09:39,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41659848042080655 [2022-12-13 16:09:39,857 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3564 transitions. [2022-12-13 16:09:39,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3564 transitions. [2022-12-13 16:09:39,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:09:39,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3564 transitions. [2022-12-13 16:09:39,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 712.8) internal successors, (3564), 5 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:39,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:39,872 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:39,872 INFO L175 Difference]: Start difference. First operand has 105 places, 169 transitions, 1509 flow. Second operand 5 states and 3564 transitions. [2022-12-13 16:09:39,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 249 transitions, 2740 flow [2022-12-13 16:09:43,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 249 transitions, 2699 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-13 16:09:43,491 INFO L231 Difference]: Finished difference. Result has 108 places, 172 transitions, 1531 flow [2022-12-13 16:09:43,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1531, PETRI_PLACES=108, PETRI_TRANSITIONS=172} [2022-12-13 16:09:43,492 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2022-12-13 16:09:43,492 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 172 transitions, 1531 flow [2022-12-13 16:09:43,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 702.6) internal successors, (3513), 5 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) [2022-12-13 16:09:43,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:09:43,492 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:09:43,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 16:09:43,492 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:09:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:43,493 INFO L85 PathProgramCache]: Analyzing trace with hash -51961970, now seen corresponding path program 1 times [2022-12-13 16:09:43,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:43,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654223247] [2022-12-13 16:09:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:43,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:09:44,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:44,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654223247] [2022-12-13 16:09:44,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654223247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:09:44,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777268621] [2022-12-13 16:09:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:44,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:09:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:09:44,112 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:09:44,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:09:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 16:09:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:09:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:09:44,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:09:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:09:44,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777268621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:09:44,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:09:44,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 16:09:44,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7340939] [2022-12-13 16:09:44,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:09:44,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:09:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:44,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:09:44,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:09:45,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 688 out of 1711 [2022-12-13 16:09:45,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 172 transitions, 1531 flow. Second operand has 8 states, 8 states have (on average 694.375) internal successors, (5555), 8 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:45,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:09:45,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 688 of 1711 [2022-12-13 16:09:45,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:10:00,525 INFO L130 PetriNetUnfolder]: 65952/90569 cut-off events. [2022-12-13 16:10:00,525 INFO L131 PetriNetUnfolder]: For 239203/239203 co-relation queries the response was YES. [2022-12-13 16:10:00,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338552 conditions, 90569 events. 65952/90569 cut-off events. For 239203/239203 co-relation queries the response was YES. Maximal size of possible extension queue 2502. Compared 574086 event pairs, 9325 based on Foata normal form. 36/81713 useless extension candidates. Maximal degree in co-relation 338435. Up to 54670 conditions per place. [2022-12-13 16:10:01,102 INFO L137 encePairwiseOnDemand]: 1701/1711 looper letters, 313 selfloop transitions, 64 changer transitions 26/403 dead transitions. [2022-12-13 16:10:01,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 403 transitions, 3675 flow [2022-12-13 16:10:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:10:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 16:10:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 5700 transitions. [2022-12-13 16:10:01,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41642314436002337 [2022-12-13 16:10:01,109 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 5700 transitions. [2022-12-13 16:10:01,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 5700 transitions. [2022-12-13 16:10:01,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:10:01,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 5700 transitions. [2022-12-13 16:10:01,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 712.5) internal successors, (5700), 8 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:01,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1711.0) internal successors, (15399), 9 states have internal predecessors, (15399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:01,124 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1711.0) internal successors, (15399), 9 states have internal predecessors, (15399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:01,124 INFO L175 Difference]: Start difference. First operand has 108 places, 172 transitions, 1531 flow. Second operand 8 states and 5700 transitions. [2022-12-13 16:10:01,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 403 transitions, 3675 flow [2022-12-13 16:10:03,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 403 transitions, 3672 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:10:03,556 INFO L231 Difference]: Finished difference. Result has 119 places, 210 transitions, 2179 flow [2022-12-13 16:10:03,556 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2179, PETRI_PLACES=119, PETRI_TRANSITIONS=210} [2022-12-13 16:10:03,557 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 73 predicate places. [2022-12-13 16:10:03,557 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 210 transitions, 2179 flow [2022-12-13 16:10:03,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 694.375) internal successors, (5555), 8 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:03,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:10:03,558 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:10:03,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:10:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 16:10:03,759 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:10:03,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:03,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1956347020, now seen corresponding path program 2 times [2022-12-13 16:10:03,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:03,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657444111] [2022-12-13 16:10:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:03,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:10:04,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:04,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657444111] [2022-12-13 16:10:04,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657444111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:04,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:04,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:10:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25623015] [2022-12-13 16:10:04,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:04,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:10:04,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:04,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:10:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:10:04,308 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1711 [2022-12-13 16:10:04,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 210 transitions, 2179 flow. Second operand has 5 states, 5 states have (on average 696.6) internal successors, (3483), 5 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) [2022-12-13 16:10:04,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:10:04,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1711 [2022-12-13 16:10:04,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:10:20,174 INFO L130 PetriNetUnfolder]: 65995/90668 cut-off events. [2022-12-13 16:10:20,174 INFO L131 PetriNetUnfolder]: For 327308/327308 co-relation queries the response was YES. [2022-12-13 16:10:20,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358403 conditions, 90668 events. 65995/90668 cut-off events. For 327308/327308 co-relation queries the response was YES. Maximal size of possible extension queue 2525. Compared 574230 event pairs, 16386 based on Foata normal form. 62/81842 useless extension candidates. Maximal degree in co-relation 358295. Up to 74269 conditions per place. [2022-12-13 16:10:20,831 INFO L137 encePairwiseOnDemand]: 1706/1711 looper letters, 270 selfloop transitions, 21 changer transitions 24/315 dead transitions. [2022-12-13 16:10:20,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 315 transitions, 3340 flow [2022-12-13 16:10:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:10:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:10:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3584 transitions. [2022-12-13 16:10:20,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4189362945645821 [2022-12-13 16:10:20,837 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3584 transitions. [2022-12-13 16:10:20,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3584 transitions. [2022-12-13 16:10:20,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:10:20,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3584 transitions. [2022-12-13 16:10:20,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 716.8) internal successors, (3584), 5 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:20,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:20,847 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:20,847 INFO L175 Difference]: Start difference. First operand has 119 places, 210 transitions, 2179 flow. Second operand 5 states and 3584 transitions. [2022-12-13 16:10:20,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 315 transitions, 3340 flow [2022-12-13 16:10:24,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 315 transitions, 3310 flow, removed 15 selfloop flow, removed 1 redundant places. [2022-12-13 16:10:24,408 INFO L231 Difference]: Finished difference. Result has 122 places, 204 transitions, 2129 flow [2022-12-13 16:10:24,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2129, PETRI_PLACES=122, PETRI_TRANSITIONS=204} [2022-12-13 16:10:24,409 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 76 predicate places. [2022-12-13 16:10:24,409 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 204 transitions, 2129 flow [2022-12-13 16:10:24,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 696.6) internal successors, (3483), 5 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) [2022-12-13 16:10:24,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:10:24,409 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:10:24,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 16:10:24,409 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:10:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:24,410 INFO L85 PathProgramCache]: Analyzing trace with hash 72945360, now seen corresponding path program 3 times [2022-12-13 16:10:24,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:24,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043053553] [2022-12-13 16:10:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:24,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:10:24,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:24,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043053553] [2022-12-13 16:10:24,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043053553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:24,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:24,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:10:24,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147217987] [2022-12-13 16:10:24,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:24,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:10:24,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:24,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:10:24,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:10:24,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 696 out of 1711 [2022-12-13 16:10:24,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 204 transitions, 2129 flow. Second operand has 5 states, 5 states have (on average 701.6) internal successors, (3508), 5 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:24,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:10:24,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 696 of 1711 [2022-12-13 16:10:24,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:10:41,072 INFO L130 PetriNetUnfolder]: 65895/90500 cut-off events. [2022-12-13 16:10:41,072 INFO L131 PetriNetUnfolder]: For 329351/329351 co-relation queries the response was YES. [2022-12-13 16:10:41,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359385 conditions, 90500 events. 65895/90500 cut-off events. For 329351/329351 co-relation queries the response was YES. Maximal size of possible extension queue 2514. Compared 575618 event pairs, 33655 based on Foata normal form. 2/81622 useless extension candidates. Maximal degree in co-relation 359282. Up to 88356 conditions per place. [2022-12-13 16:10:41,749 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 252 selfloop transitions, 12 changer transitions 24/288 dead transitions. [2022-12-13 16:10:41,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 288 transitions, 3110 flow [2022-12-13 16:10:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:10:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:10:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3597 transitions. [2022-12-13 16:10:41,754 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4204558737580362 [2022-12-13 16:10:41,754 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3597 transitions. [2022-12-13 16:10:41,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3597 transitions. [2022-12-13 16:10:41,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:10:41,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3597 transitions. [2022-12-13 16:10:41,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 719.4) internal successors, (3597), 5 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:41,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:41,764 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:41,764 INFO L175 Difference]: Start difference. First operand has 122 places, 204 transitions, 2129 flow. Second operand 5 states and 3597 transitions. [2022-12-13 16:10:41,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 288 transitions, 3110 flow [2022-12-13 16:10:45,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 288 transitions, 3084 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 16:10:45,003 INFO L231 Difference]: Finished difference. Result has 125 places, 206 transitions, 2183 flow [2022-12-13 16:10:45,003 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2183, PETRI_PLACES=125, PETRI_TRANSITIONS=206} [2022-12-13 16:10:45,003 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 79 predicate places. [2022-12-13 16:10:45,003 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 206 transitions, 2183 flow [2022-12-13 16:10:45,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 701.6) internal successors, (3508), 5 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:45,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:10:45,004 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:10:45,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 16:10:45,004 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:10:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:45,004 INFO L85 PathProgramCache]: Analyzing trace with hash -477658334, now seen corresponding path program 4 times [2022-12-13 16:10:45,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:45,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993054742] [2022-12-13 16:10:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:45,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:10:45,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:45,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993054742] [2022-12-13 16:10:45,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993054742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:45,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:45,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:10:45,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836630109] [2022-12-13 16:10:45,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:10:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:10:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:10:45,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 693 out of 1711 [2022-12-13 16:10:45,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 206 transitions, 2183 flow. Second operand has 5 states, 5 states have (on average 698.6) internal successors, (3493), 5 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:45,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:10:45,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 693 of 1711 [2022-12-13 16:10:45,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:11:02,694 INFO L130 PetriNetUnfolder]: 68075/93829 cut-off events. [2022-12-13 16:11:02,694 INFO L131 PetriNetUnfolder]: For 336687/336687 co-relation queries the response was YES. [2022-12-13 16:11:03,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370759 conditions, 93829 events. 68075/93829 cut-off events. For 336687/336687 co-relation queries the response was YES. Maximal size of possible extension queue 2625. Compared 603032 event pairs, 29745 based on Foata normal form. 33/84806 useless extension candidates. Maximal degree in co-relation 370646. Up to 74332 conditions per place. [2022-12-13 16:11:03,419 INFO L137 encePairwiseOnDemand]: 1706/1711 looper letters, 275 selfloop transitions, 16 changer transitions 22/313 dead transitions. [2022-12-13 16:11:03,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 313 transitions, 3363 flow [2022-12-13 16:11:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:11:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:11:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3599 transitions. [2022-12-13 16:11:03,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4206896551724138 [2022-12-13 16:11:03,424 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3599 transitions. [2022-12-13 16:11:03,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3599 transitions. [2022-12-13 16:11:03,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:11:03,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3599 transitions. [2022-12-13 16:11:03,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 719.8) internal successors, (3599), 5 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:03,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:03,433 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1711.0) internal successors, (10266), 6 states have internal predecessors, (10266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:03,433 INFO L175 Difference]: Start difference. First operand has 125 places, 206 transitions, 2183 flow. Second operand 5 states and 3599 transitions. [2022-12-13 16:11:03,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 313 transitions, 3363 flow [2022-12-13 16:11:07,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 313 transitions, 3335 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-12-13 16:11:07,655 INFO L231 Difference]: Finished difference. Result has 128 places, 203 transitions, 2166 flow [2022-12-13 16:11:07,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2166, PETRI_PLACES=128, PETRI_TRANSITIONS=203} [2022-12-13 16:11:07,656 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 82 predicate places. [2022-12-13 16:11:07,656 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 203 transitions, 2166 flow [2022-12-13 16:11:07,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 698.6) internal successors, (3493), 5 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:07,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:11:07,656 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:11:07,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 16:11:07,656 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:11:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:11:07,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1734059876, now seen corresponding path program 5 times [2022-12-13 16:11:07,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:11:07,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817536746] [2022-12-13 16:11:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:11:07,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:11:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:11:08,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:11:08,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817536746] [2022-12-13 16:11:08,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817536746] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:11:08,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:11:08,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:11:08,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623992519] [2022-12-13 16:11:08,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:11:08,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:11:08,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:11:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:11:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:11:08,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 693 out of 1711 [2022-12-13 16:11:08,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 203 transitions, 2166 flow. Second operand has 5 states, 5 states have (on average 698.6) internal successors, (3493), 5 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:08,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:11:08,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 693 of 1711 [2022-12-13 16:11:08,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:11:24,720 INFO L130 PetriNetUnfolder]: 68347/94342 cut-off events. [2022-12-13 16:11:24,721 INFO L131 PetriNetUnfolder]: For 353327/353327 co-relation queries the response was YES. [2022-12-13 16:11:25,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375193 conditions, 94342 events. 68347/94342 cut-off events. For 353327/353327 co-relation queries the response was YES. Maximal size of possible extension queue 2638. Compared 610762 event pairs, 34651 based on Foata normal form. 1/85299 useless extension candidates. Maximal degree in co-relation 375076. Up to 91256 conditions per place. [2022-12-13 16:11:25,484 INFO L137 encePairwiseOnDemand]: 1702/1711 looper letters, 234 selfloop transitions, 33 changer transitions 23/290 dead transitions. [2022-12-13 16:11:25,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 290 transitions, 3169 flow [2022-12-13 16:11:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:11:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:11:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4278 transitions. [2022-12-13 16:11:25,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41671537112799534 [2022-12-13 16:11:25,489 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4278 transitions. [2022-12-13 16:11:25,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4278 transitions. [2022-12-13 16:11:25,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:11:25,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4278 transitions. [2022-12-13 16:11:25,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 713.0) internal successors, (4278), 6 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) [2022-12-13 16:11:25,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1711.0) internal successors, (11977), 7 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:25,498 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1711.0) internal successors, (11977), 7 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:25,498 INFO L175 Difference]: Start difference. First operand has 128 places, 203 transitions, 2166 flow. Second operand 6 states and 4278 transitions. [2022-12-13 16:11:25,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 290 transitions, 3169 flow [2022-12-13 16:11:30,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 290 transitions, 3149 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 16:11:30,828 INFO L231 Difference]: Finished difference. Result has 131 places, 208 transitions, 2282 flow [2022-12-13 16:11:30,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2282, PETRI_PLACES=131, PETRI_TRANSITIONS=208} [2022-12-13 16:11:30,828 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 85 predicate places. [2022-12-13 16:11:30,828 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 208 transitions, 2282 flow [2022-12-13 16:11:30,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 698.6) internal successors, (3493), 5 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:30,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:11:30,829 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:11:30,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 16:11:30,829 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:11:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:11:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2082669568, now seen corresponding path program 6 times [2022-12-13 16:11:30,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:11:30,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977590565] [2022-12-13 16:11:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:11:30,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:11:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:11:31,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:11:31,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977590565] [2022-12-13 16:11:31,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977590565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:11:31,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:11:31,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:11:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114597575] [2022-12-13 16:11:31,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:11:31,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:11:31,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:11:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:11:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:11:31,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1711 [2022-12-13 16:11:31,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 208 transitions, 2282 flow. Second operand has 5 states, 5 states have (on average 696.6) internal successors, (3483), 5 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) [2022-12-13 16:11:31,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:11:31,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1711 [2022-12-13 16:11:31,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:11:49,413 INFO L130 PetriNetUnfolder]: 68545/94618 cut-off events. [2022-12-13 16:11:49,413 INFO L131 PetriNetUnfolder]: For 353217/353217 co-relation queries the response was YES. [2022-12-13 16:11:49,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380047 conditions, 94618 events. 68545/94618 cut-off events. For 353217/353217 co-relation queries the response was YES. Maximal size of possible extension queue 2666. Compared 611095 event pairs, 29525 based on Foata normal form. 1/85563 useless extension candidates. Maximal degree in co-relation 379933. Up to 73970 conditions per place. [2022-12-13 16:11:50,249 INFO L137 encePairwiseOnDemand]: 1701/1711 looper letters, 288 selfloop transitions, 42 changer transitions 6/336 dead transitions. [2022-12-13 16:11:50,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 336 transitions, 3687 flow [2022-12-13 16:11:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:11:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:11:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4298 transitions. [2022-12-13 16:11:50,253 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41866354958114166 [2022-12-13 16:11:50,254 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4298 transitions. [2022-12-13 16:11:50,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4298 transitions. [2022-12-13 16:11:50,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:11:50,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4298 transitions. [2022-12-13 16:11:50,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 716.3333333333334) internal successors, (4298), 6 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:50,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1711.0) internal successors, (11977), 7 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:50,263 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1711.0) internal successors, (11977), 7 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:50,263 INFO L175 Difference]: Start difference. First operand has 131 places, 208 transitions, 2282 flow. Second operand 6 states and 4298 transitions. [2022-12-13 16:11:50,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 336 transitions, 3687 flow [2022-12-13 16:11:54,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 336 transitions, 3651 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-12-13 16:11:54,076 INFO L231 Difference]: Finished difference. Result has 133 places, 216 transitions, 2467 flow [2022-12-13 16:11:54,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2467, PETRI_PLACES=133, PETRI_TRANSITIONS=216} [2022-12-13 16:11:54,076 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 87 predicate places. [2022-12-13 16:11:54,076 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 216 transitions, 2467 flow [2022-12-13 16:11:54,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 696.6) internal successors, (3483), 5 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) [2022-12-13 16:11:54,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:11:54,077 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:11:54,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 16:11:54,077 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:11:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:11:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash 65216123, now seen corresponding path program 1 times [2022-12-13 16:11:54,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:11:54,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952860123] [2022-12-13 16:11:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:11:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:11:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:11:54,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:11:54,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952860123] [2022-12-13 16:11:54,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952860123] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:11:54,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:11:54,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:11:54,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377971317] [2022-12-13 16:11:54,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:11:54,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:11:54,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:11:54,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:11:54,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:11:54,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 704 out of 1711 [2022-12-13 16:11:54,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 216 transitions, 2467 flow. Second operand has 4 states, 4 states have (on average 711.25) internal successors, (2845), 4 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:11:54,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:11:54,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 704 of 1711 [2022-12-13 16:11:54,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:12:11,375 INFO L130 PetriNetUnfolder]: 68620/94756 cut-off events. [2022-12-13 16:12:11,376 INFO L131 PetriNetUnfolder]: For 389345/389345 co-relation queries the response was YES. [2022-12-13 16:12:11,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385475 conditions, 94756 events. 68620/94756 cut-off events. For 389345/389345 co-relation queries the response was YES. Maximal size of possible extension queue 2596. Compared 613585 event pairs, 26120 based on Foata normal form. 4/85708 useless extension candidates. Maximal degree in co-relation 385349. Up to 92632 conditions per place. [2022-12-13 16:12:12,140 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 191 selfloop transitions, 14 changer transitions 62/267 dead transitions. [2022-12-13 16:12:12,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 267 transitions, 3416 flow [2022-12-13 16:12:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:12:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:12:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2903 transitions. [2022-12-13 16:12:12,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42416715371127994 [2022-12-13 16:12:12,144 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2903 transitions. [2022-12-13 16:12:12,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2903 transitions. [2022-12-13 16:12:12,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:12:12,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2903 transitions. [2022-12-13 16:12:12,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 725.75) internal successors, (2903), 4 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:12,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:12,151 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:12,151 INFO L175 Difference]: Start difference. First operand has 133 places, 216 transitions, 2467 flow. Second operand 4 states and 2903 transitions. [2022-12-13 16:12:12,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 267 transitions, 3416 flow [2022-12-13 16:12:15,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 267 transitions, 3388 flow, removed 14 selfloop flow, removed 0 redundant places. [2022-12-13 16:12:15,885 INFO L231 Difference]: Finished difference. Result has 139 places, 193 transitions, 2210 flow [2022-12-13 16:12:15,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2210, PETRI_PLACES=139, PETRI_TRANSITIONS=193} [2022-12-13 16:12:15,885 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 93 predicate places. [2022-12-13 16:12:15,885 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 193 transitions, 2210 flow [2022-12-13 16:12:15,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 711.25) internal successors, (2845), 4 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:15,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:12:15,886 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:12:15,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 16:12:15,886 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:12:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:12:15,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1656493763, now seen corresponding path program 2 times [2022-12-13 16:12:15,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:12:15,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204404609] [2022-12-13 16:12:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:15,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:12:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:12:16,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:12:16,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204404609] [2022-12-13 16:12:16,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204404609] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:12:16,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:12:16,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:12:16,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102064017] [2022-12-13 16:12:16,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:12:16,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:12:16,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:12:16,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:12:16,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:12:16,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 704 out of 1711 [2022-12-13 16:12:16,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 193 transitions, 2210 flow. Second operand has 4 states, 4 states have (on average 711.25) internal successors, (2845), 4 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:16,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:12:16,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 704 of 1711 [2022-12-13 16:12:16,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:12:32,973 INFO L130 PetriNetUnfolder]: 67361/92675 cut-off events. [2022-12-13 16:12:32,973 INFO L131 PetriNetUnfolder]: For 374201/374201 co-relation queries the response was YES. [2022-12-13 16:12:33,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374618 conditions, 92675 events. 67361/92675 cut-off events. For 374201/374201 co-relation queries the response was YES. Maximal size of possible extension queue 2540. Compared 594163 event pairs, 34675 based on Foata normal form. 2/83629 useless extension candidates. Maximal degree in co-relation 374515. Up to 91684 conditions per place. [2022-12-13 16:12:33,774 INFO L137 encePairwiseOnDemand]: 1708/1711 looper letters, 177 selfloop transitions, 0 changer transitions 55/232 dead transitions. [2022-12-13 16:12:33,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 232 transitions, 2891 flow [2022-12-13 16:12:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:12:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:12:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2897 transitions. [2022-12-13 16:12:33,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4232904734073641 [2022-12-13 16:12:33,777 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2897 transitions. [2022-12-13 16:12:33,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2897 transitions. [2022-12-13 16:12:33,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:12:33,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2897 transitions. [2022-12-13 16:12:33,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 724.25) internal successors, (2897), 4 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:33,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:33,784 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:33,784 INFO L175 Difference]: Start difference. First operand has 139 places, 193 transitions, 2210 flow. Second operand 4 states and 2897 transitions. [2022-12-13 16:12:33,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 232 transitions, 2891 flow [2022-12-13 16:12:37,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 232 transitions, 2794 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-12-13 16:12:37,187 INFO L231 Difference]: Finished difference. Result has 133 places, 177 transitions, 1836 flow [2022-12-13 16:12:37,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1836, PETRI_PLACES=133, PETRI_TRANSITIONS=177} [2022-12-13 16:12:37,188 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 87 predicate places. [2022-12-13 16:12:37,188 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 177 transitions, 1836 flow [2022-12-13 16:12:37,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 711.25) internal successors, (2845), 4 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:37,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:12:37,188 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:12:37,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 16:12:37,189 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:12:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:12:37,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1590465432, now seen corresponding path program 1 times [2022-12-13 16:12:37,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:12:37,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288489155] [2022-12-13 16:12:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:37,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:12:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:12:37,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:12:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288489155] [2022-12-13 16:12:37,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288489155] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:12:37,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:12:37,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:12:37,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144879518] [2022-12-13 16:12:37,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:12:37,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:12:37,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:12:37,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:12:37,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:12:37,534 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 706 out of 1711 [2022-12-13 16:12:37,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 177 transitions, 1836 flow. Second operand has 4 states, 4 states have (on average 713.5) internal successors, (2854), 4 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:37,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:12:37,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 706 of 1711 [2022-12-13 16:12:37,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:12:53,892 INFO L130 PetriNetUnfolder]: 67218/92303 cut-off events. [2022-12-13 16:12:53,892 INFO L131 PetriNetUnfolder]: For 330634/330634 co-relation queries the response was YES. [2022-12-13 16:12:54,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370661 conditions, 92303 events. 67218/92303 cut-off events. For 330634/330634 co-relation queries the response was YES. Maximal size of possible extension queue 2489. Compared 586491 event pairs, 17249 based on Foata normal form. 96/83261 useless extension candidates. Maximal degree in co-relation 370616. Up to 89830 conditions per place. [2022-12-13 16:12:54,641 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 202 selfloop transitions, 15 changer transitions 5/222 dead transitions. [2022-12-13 16:12:54,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 222 transitions, 2541 flow [2022-12-13 16:12:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:12:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:12:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2911 transitions. [2022-12-13 16:12:54,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4253360607831677 [2022-12-13 16:12:54,644 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2911 transitions. [2022-12-13 16:12:54,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2911 transitions. [2022-12-13 16:12:54,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:12:54,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2911 transitions. [2022-12-13 16:12:54,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 727.75) internal successors, (2911), 4 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) [2022-12-13 16:12:54,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:54,651 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:54,651 INFO L175 Difference]: Start difference. First operand has 133 places, 177 transitions, 1836 flow. Second operand 4 states and 2911 transitions. [2022-12-13 16:12:54,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 222 transitions, 2541 flow [2022-12-13 16:12:59,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 222 transitions, 2341 flow, removed 54 selfloop flow, removed 12 redundant places. [2022-12-13 16:12:59,676 INFO L231 Difference]: Finished difference. Result has 117 places, 180 transitions, 1762 flow [2022-12-13 16:12:59,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1762, PETRI_PLACES=117, PETRI_TRANSITIONS=180} [2022-12-13 16:12:59,676 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2022-12-13 16:12:59,677 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 180 transitions, 1762 flow [2022-12-13 16:12:59,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 713.5) internal successors, (2854), 4 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:12:59,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:12:59,677 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:12:59,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 16:12:59,677 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:12:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:12:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1264282506, now seen corresponding path program 2 times [2022-12-13 16:12:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:12:59,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981136254] [2022-12-13 16:12:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:59,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:12:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-13 16:12:59,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:12:59,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981136254] [2022-12-13 16:12:59,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981136254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:12:59,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:12:59,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:12:59,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576593022] [2022-12-13 16:12:59,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:12:59,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:12:59,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:12:59,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:12:59,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:13:00,026 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 706 out of 1711 [2022-12-13 16:13:00,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 180 transitions, 1762 flow. Second operand has 4 states, 4 states have (on average 713.5) internal successors, (2854), 4 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:00,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:13:00,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 706 of 1711 [2022-12-13 16:13:00,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:13:15,558 INFO L130 PetriNetUnfolder]: 67019/92000 cut-off events. [2022-12-13 16:13:15,558 INFO L131 PetriNetUnfolder]: For 266934/266934 co-relation queries the response was YES. [2022-12-13 16:13:16,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346714 conditions, 92000 events. 67019/92000 cut-off events. For 266934/266934 co-relation queries the response was YES. Maximal size of possible extension queue 2531. Compared 587093 event pairs, 34144 based on Foata normal form. 34/82942 useless extension candidates. Maximal degree in co-relation 346675. Up to 90324 conditions per place. [2022-12-13 16:13:16,294 INFO L137 encePairwiseOnDemand]: 1708/1711 looper letters, 225 selfloop transitions, 7 changer transitions 3/235 dead transitions. [2022-12-13 16:13:16,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 235 transitions, 2446 flow [2022-12-13 16:13:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:13:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:13:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2920 transitions. [2022-12-13 16:13:16,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4266510812390415 [2022-12-13 16:13:16,298 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2920 transitions. [2022-12-13 16:13:16,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2920 transitions. [2022-12-13 16:13:16,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:13:16,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2920 transitions. [2022-12-13 16:13:16,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 730.0) internal successors, (2920), 4 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:16,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:16,305 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:16,305 INFO L175 Difference]: Start difference. First operand has 117 places, 180 transitions, 1762 flow. Second operand 4 states and 2920 transitions. [2022-12-13 16:13:16,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 235 transitions, 2446 flow [2022-12-13 16:13:19,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 235 transitions, 2435 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:13:19,344 INFO L231 Difference]: Finished difference. Result has 120 places, 179 transitions, 1748 flow [2022-12-13 16:13:19,344 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1748, PETRI_PLACES=120, PETRI_TRANSITIONS=179} [2022-12-13 16:13:19,344 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 74 predicate places. [2022-12-13 16:13:19,344 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 179 transitions, 1748 flow [2022-12-13 16:13:19,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 713.5) internal successors, (2854), 4 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:19,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:13:19,345 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:13:19,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 16:13:19,345 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:13:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1908219448, now seen corresponding path program 3 times [2022-12-13 16:13:19,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:19,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18063924] [2022-12-13 16:13:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:19,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-13 16:13:19,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:19,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18063924] [2022-12-13 16:13:19,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18063924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:13:19,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:13:19,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:13:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187036833] [2022-12-13 16:13:19,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:13:19,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:13:19,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:13:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:13:19,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 706 out of 1711 [2022-12-13 16:13:19,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 179 transitions, 1748 flow. Second operand has 4 states, 4 states have (on average 713.5) internal successors, (2854), 4 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:19,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:13:19,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 706 of 1711 [2022-12-13 16:13:19,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:13:35,075 INFO L130 PetriNetUnfolder]: 66523/91266 cut-off events. [2022-12-13 16:13:35,075 INFO L131 PetriNetUnfolder]: For 266053/266053 co-relation queries the response was YES. [2022-12-13 16:13:35,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343435 conditions, 91266 events. 66523/91266 cut-off events. For 266053/266053 co-relation queries the response was YES. Maximal size of possible extension queue 2496. Compared 578458 event pairs, 18463 based on Foata normal form. 160/82430 useless extension candidates. Maximal degree in co-relation 343395. Up to 90581 conditions per place. [2022-12-13 16:13:35,987 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 203 selfloop transitions, 15 changer transitions 5/223 dead transitions. [2022-12-13 16:13:35,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 223 transitions, 2382 flow [2022-12-13 16:13:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:13:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:13:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2913 transitions. [2022-12-13 16:13:35,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4256282875511397 [2022-12-13 16:13:35,991 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2913 transitions. [2022-12-13 16:13:35,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2913 transitions. [2022-12-13 16:13:35,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:13:35,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2913 transitions. [2022-12-13 16:13:35,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 728.25) internal successors, (2913), 4 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:35,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:35,997 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:35,998 INFO L175 Difference]: Start difference. First operand has 120 places, 179 transitions, 1748 flow. Second operand 4 states and 2913 transitions. [2022-12-13 16:13:35,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 223 transitions, 2382 flow [2022-12-13 16:13:38,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 223 transitions, 2354 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-13 16:13:38,098 INFO L231 Difference]: Finished difference. Result has 119 places, 180 transitions, 1768 flow [2022-12-13 16:13:38,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1768, PETRI_PLACES=119, PETRI_TRANSITIONS=180} [2022-12-13 16:13:38,099 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 73 predicate places. [2022-12-13 16:13:38,099 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 180 transitions, 1768 flow [2022-12-13 16:13:38,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 713.5) internal successors, (2854), 4 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:38,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:13:38,099 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:13:38,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 16:13:38,100 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:13:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1570820694, now seen corresponding path program 4 times [2022-12-13 16:13:38,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089485714] [2022-12-13 16:13:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-13 16:13:38,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:38,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089485714] [2022-12-13 16:13:38,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089485714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:13:38,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:13:38,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:13:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925892365] [2022-12-13 16:13:38,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:13:38,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:13:38,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:13:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:13:38,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 706 out of 1711 [2022-12-13 16:13:38,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 180 transitions, 1768 flow. Second operand has 4 states, 4 states have (on average 713.5) internal successors, (2854), 4 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:38,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:13:38,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 706 of 1711 [2022-12-13 16:13:38,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:13:53,799 INFO L130 PetriNetUnfolder]: 66242/90811 cut-off events. [2022-12-13 16:13:53,799 INFO L131 PetriNetUnfolder]: For 258701/258701 co-relation queries the response was YES. [2022-12-13 16:13:54,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342101 conditions, 90811 events. 66242/90811 cut-off events. For 258701/258701 co-relation queries the response was YES. Maximal size of possible extension queue 2510. Compared 575861 event pairs, 34772 based on Foata normal form. 6/81909 useless extension candidates. Maximal degree in co-relation 342063. Up to 90324 conditions per place. [2022-12-13 16:13:54,529 INFO L137 encePairwiseOnDemand]: 1708/1711 looper letters, 201 selfloop transitions, 1 changer transitions 8/210 dead transitions. [2022-12-13 16:13:54,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 210 transitions, 2275 flow [2022-12-13 16:13:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:13:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:13:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2901 transitions. [2022-12-13 16:13:54,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42387492694330803 [2022-12-13 16:13:54,532 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2901 transitions. [2022-12-13 16:13:54,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2901 transitions. [2022-12-13 16:13:54,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:13:54,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2901 transitions. [2022-12-13 16:13:54,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 725.25) internal successors, (2901), 4 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:54,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:54,539 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:54,539 INFO L175 Difference]: Start difference. First operand has 119 places, 180 transitions, 1768 flow. Second operand 4 states and 2901 transitions. [2022-12-13 16:13:54,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 210 transitions, 2275 flow [2022-12-13 16:13:57,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 210 transitions, 2261 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-12-13 16:13:57,610 INFO L231 Difference]: Finished difference. Result has 123 places, 177 transitions, 1699 flow [2022-12-13 16:13:57,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1699, PETRI_PLACES=123, PETRI_TRANSITIONS=177} [2022-12-13 16:13:57,611 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2022-12-13 16:13:57,611 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 177 transitions, 1699 flow [2022-12-13 16:13:57,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 713.5) internal successors, (2854), 4 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:57,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:13:57,611 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:13:57,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 16:13:57,611 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:13:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash 904397972, now seen corresponding path program 5 times [2022-12-13 16:13:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991865918] [2022-12-13 16:13:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-13 16:13:57,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:57,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991865918] [2022-12-13 16:13:57,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991865918] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:13:57,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:13:57,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:13:57,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683408767] [2022-12-13 16:13:57,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:13:57,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:13:57,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:13:57,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:13:57,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 1711 [2022-12-13 16:13:57,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 177 transitions, 1699 flow. Second operand has 4 states, 4 states have (on average 714.5) internal successors, (2858), 4 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:13:57,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:13:57,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 1711 [2022-12-13 16:13:57,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:14:13,231 INFO L130 PetriNetUnfolder]: 65953/90338 cut-off events. [2022-12-13 16:14:13,231 INFO L131 PetriNetUnfolder]: For 255520/255520 co-relation queries the response was YES. [2022-12-13 16:14:13,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340227 conditions, 90338 events. 65953/90338 cut-off events. For 255520/255520 co-relation queries the response was YES. Maximal size of possible extension queue 2476. Compared 570447 event pairs, 18264 based on Foata normal form. 6/81526 useless extension candidates. Maximal degree in co-relation 340187. Up to 89969 conditions per place. [2022-12-13 16:14:13,894 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 188 selfloop transitions, 5 changer transitions 10/203 dead transitions. [2022-12-13 16:14:13,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 203 transitions, 2187 flow [2022-12-13 16:14:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:14:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:14:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2901 transitions. [2022-12-13 16:14:13,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42387492694330803 [2022-12-13 16:14:13,897 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2901 transitions. [2022-12-13 16:14:13,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2901 transitions. [2022-12-13 16:14:13,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:14:13,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2901 transitions. [2022-12-13 16:14:13,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 725.25) internal successors, (2901), 4 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:13,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:13,904 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:13,904 INFO L175 Difference]: Start difference. First operand has 123 places, 177 transitions, 1699 flow. Second operand 4 states and 2901 transitions. [2022-12-13 16:14:13,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 203 transitions, 2187 flow [2022-12-13 16:14:16,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 203 transitions, 2169 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 16:14:16,049 INFO L231 Difference]: Finished difference. Result has 119 places, 174 transitions, 1637 flow [2022-12-13 16:14:16,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1637, PETRI_PLACES=119, PETRI_TRANSITIONS=174} [2022-12-13 16:14:16,050 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 73 predicate places. [2022-12-13 16:14:16,050 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 174 transitions, 1637 flow [2022-12-13 16:14:16,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 714.5) internal successors, (2858), 4 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:16,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:14:16,050 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:14:16,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 16:14:16,050 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:14:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:16,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1774958321, now seen corresponding path program 1 times [2022-12-13 16:14:16,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:16,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562574049] [2022-12-13 16:14:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:16,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:14:16,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:16,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562574049] [2022-12-13 16:14:16,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562574049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:14:16,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:14:16,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:14:16,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538733882] [2022-12-13 16:14:16,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:14:16,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:14:16,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:14:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:14:16,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 706 out of 1711 [2022-12-13 16:14:16,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 174 transitions, 1637 flow. Second operand has 4 states, 4 states have (on average 714.75) internal successors, (2859), 4 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:16,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:14:16,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 706 of 1711 [2022-12-13 16:14:16,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:14:31,977 INFO L130 PetriNetUnfolder]: 68995/94461 cut-off events. [2022-12-13 16:14:31,977 INFO L131 PetriNetUnfolder]: For 266649/266649 co-relation queries the response was YES. [2022-12-13 16:14:32,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354394 conditions, 94461 events. 68995/94461 cut-off events. For 266649/266649 co-relation queries the response was YES. Maximal size of possible extension queue 2570. Compared 599346 event pairs, 11589 based on Foata normal form. 994/86501 useless extension candidates. Maximal degree in co-relation 354357. Up to 66874 conditions per place. [2022-12-13 16:14:32,635 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 237 selfloop transitions, 14 changer transitions 0/251 dead transitions. [2022-12-13 16:14:32,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 251 transitions, 2580 flow [2022-12-13 16:14:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:14:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:14:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2928 transitions. [2022-12-13 16:14:32,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42781998831092927 [2022-12-13 16:14:32,639 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2928 transitions. [2022-12-13 16:14:32,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2928 transitions. [2022-12-13 16:14:32,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:14:32,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2928 transitions. [2022-12-13 16:14:32,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 732.0) internal successors, (2928), 4 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:32,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:32,646 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:32,646 INFO L175 Difference]: Start difference. First operand has 119 places, 174 transitions, 1637 flow. Second operand 4 states and 2928 transitions. [2022-12-13 16:14:32,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 251 transitions, 2580 flow [2022-12-13 16:14:35,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 251 transitions, 2563 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-12-13 16:14:35,729 INFO L231 Difference]: Finished difference. Result has 116 places, 172 transitions, 1652 flow [2022-12-13 16:14:35,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1652, PETRI_PLACES=116, PETRI_TRANSITIONS=172} [2022-12-13 16:14:35,729 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2022-12-13 16:14:35,729 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 172 transitions, 1652 flow [2022-12-13 16:14:35,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 714.75) internal successors, (2859), 4 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:35,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:14:35,730 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:14:35,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 16:14:35,730 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:14:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:35,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1263952791, now seen corresponding path program 2 times [2022-12-13 16:14:35,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:35,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912772011] [2022-12-13 16:14:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:35,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:14:35,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912772011] [2022-12-13 16:14:35,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912772011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:14:35,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:14:35,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:14:35,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201717560] [2022-12-13 16:14:35,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:14:35,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:14:35,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:14:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:14:35,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 706 out of 1711 [2022-12-13 16:14:35,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 172 transitions, 1652 flow. Second operand has 4 states, 4 states have (on average 714.75) internal successors, (2859), 4 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:35,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:14:35,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 706 of 1711 [2022-12-13 16:14:35,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:14:50,492 INFO L130 PetriNetUnfolder]: 61083/83293 cut-off events. [2022-12-13 16:14:50,493 INFO L131 PetriNetUnfolder]: For 279302/279302 co-relation queries the response was YES. [2022-12-13 16:14:50,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315244 conditions, 83293 events. 61083/83293 cut-off events. For 279302/279302 co-relation queries the response was YES. Maximal size of possible extension queue 2261. Compared 512410 event pairs, 9736 based on Foata normal form. 1732/76503 useless extension candidates. Maximal degree in co-relation 315206. Up to 76798 conditions per place. [2022-12-13 16:14:51,036 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 216 selfloop transitions, 15 changer transitions 5/236 dead transitions. [2022-12-13 16:14:51,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 236 transitions, 2431 flow [2022-12-13 16:14:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:14:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:14:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2925 transitions. [2022-12-13 16:14:51,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42738164815897134 [2022-12-13 16:14:51,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2925 transitions. [2022-12-13 16:14:51,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2925 transitions. [2022-12-13 16:14:51,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:14:51,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2925 transitions. [2022-12-13 16:14:51,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 731.25) internal successors, (2925), 4 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:51,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:51,047 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:51,047 INFO L175 Difference]: Start difference. First operand has 116 places, 172 transitions, 1652 flow. Second operand 4 states and 2925 transitions. [2022-12-13 16:14:51,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 236 transitions, 2431 flow [2022-12-13 16:14:52,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 236 transitions, 2412 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 16:14:52,622 INFO L231 Difference]: Finished difference. Result has 117 places, 166 transitions, 1611 flow [2022-12-13 16:14:52,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1611, PETRI_PLACES=117, PETRI_TRANSITIONS=166} [2022-12-13 16:14:52,622 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2022-12-13 16:14:52,622 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 166 transitions, 1611 flow [2022-12-13 16:14:52,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 714.75) internal successors, (2859), 4 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:52,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:14:52,623 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:14:52,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 16:14:52,623 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:14:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1590841611, now seen corresponding path program 3 times [2022-12-13 16:14:52,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:52,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473676417] [2022-12-13 16:14:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:52,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:14:52,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:52,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473676417] [2022-12-13 16:14:52,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473676417] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:14:52,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:14:52,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:14:52,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889662763] [2022-12-13 16:14:52,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:14:52,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:14:52,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:52,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:14:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:14:52,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 707 out of 1711 [2022-12-13 16:14:52,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 166 transitions, 1611 flow. Second operand has 4 states, 4 states have (on average 715.75) internal successors, (2863), 4 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:14:52,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:14:52,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 707 of 1711 [2022-12-13 16:14:52,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:15:07,059 INFO L130 PetriNetUnfolder]: 59802/81328 cut-off events. [2022-12-13 16:15:07,059 INFO L131 PetriNetUnfolder]: For 239874/239874 co-relation queries the response was YES. [2022-12-13 16:15:07,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308664 conditions, 81328 events. 59802/81328 cut-off events. For 239874/239874 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 496872 event pairs, 16157 based on Foata normal form. 62/72936 useless extension candidates. Maximal degree in co-relation 308627. Up to 80937 conditions per place. [2022-12-13 16:15:07,622 INFO L137 encePairwiseOnDemand]: 1707/1711 looper letters, 173 selfloop transitions, 5 changer transitions 25/203 dead transitions. [2022-12-13 16:15:07,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 203 transitions, 2161 flow [2022-12-13 16:15:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:15:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:15:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2910 transitions. [2022-12-13 16:15:07,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42518994739918176 [2022-12-13 16:15:07,626 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2910 transitions. [2022-12-13 16:15:07,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2910 transitions. [2022-12-13 16:15:07,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:15:07,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2910 transitions. [2022-12-13 16:15:07,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 727.5) internal successors, (2910), 4 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:07,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:07,632 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:07,632 INFO L175 Difference]: Start difference. First operand has 117 places, 166 transitions, 1611 flow. Second operand 4 states and 2910 transitions. [2022-12-13 16:15:07,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 203 transitions, 2161 flow [2022-12-13 16:15:09,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 203 transitions, 2108 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-12-13 16:15:09,373 INFO L231 Difference]: Finished difference. Result has 114 places, 160 transitions, 1504 flow [2022-12-13 16:15:09,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1504, PETRI_PLACES=114, PETRI_TRANSITIONS=160} [2022-12-13 16:15:09,373 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 68 predicate places. [2022-12-13 16:15:09,373 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 160 transitions, 1504 flow [2022-12-13 16:15:09,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 715.75) internal successors, (2863), 4 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:09,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:15:09,374 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:15:09,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 16:15:09,374 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:15:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:09,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1621022731, now seen corresponding path program 4 times [2022-12-13 16:15:09,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:09,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645776668] [2022-12-13 16:15:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:09,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 16:15:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:09,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645776668] [2022-12-13 16:15:09,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645776668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:15:09,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:15:09,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:15:09,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010605885] [2022-12-13 16:15:09,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:15:09,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:15:09,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:15:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:15:09,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 706 out of 1711 [2022-12-13 16:15:09,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 160 transitions, 1504 flow. Second operand has 4 states, 4 states have (on average 714.75) internal successors, (2859), 4 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:09,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:15:09,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 706 of 1711 [2022-12-13 16:15:09,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:15:23,387 INFO L130 PetriNetUnfolder]: 57179/77355 cut-off events. [2022-12-13 16:15:23,387 INFO L131 PetriNetUnfolder]: For 212152/212152 co-relation queries the response was YES. [2022-12-13 16:15:23,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287455 conditions, 77355 events. 57179/77355 cut-off events. For 212152/212152 co-relation queries the response was YES. Maximal size of possible extension queue 2078. Compared 463021 event pairs, 29742 based on Foata normal form. 44/69105 useless extension candidates. Maximal degree in co-relation 287420. Up to 77273 conditions per place. [2022-12-13 16:15:23,908 INFO L137 encePairwiseOnDemand]: 1708/1711 looper letters, 151 selfloop transitions, 0 changer transitions 23/174 dead transitions. [2022-12-13 16:15:23,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 174 transitions, 1889 flow [2022-12-13 16:15:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:15:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:15:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2888 transitions. [2022-12-13 16:15:23,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42197545295149036 [2022-12-13 16:15:23,912 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2888 transitions. [2022-12-13 16:15:23,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2888 transitions. [2022-12-13 16:15:23,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:15:23,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2888 transitions. [2022-12-13 16:15:23,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 722.0) internal successors, (2888), 4 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:23,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:23,920 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1711.0) internal successors, (8555), 5 states have internal predecessors, (8555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:23,920 INFO L175 Difference]: Start difference. First operand has 114 places, 160 transitions, 1504 flow. Second operand 4 states and 2888 transitions. [2022-12-13 16:15:23,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 174 transitions, 1889 flow [2022-12-13 16:15:26,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 174 transitions, 1831 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-12-13 16:15:26,251 INFO L231 Difference]: Finished difference. Result has 109 places, 151 transitions, 1329 flow [2022-12-13 16:15:26,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1711, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1329, PETRI_PLACES=109, PETRI_TRANSITIONS=151} [2022-12-13 16:15:26,252 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2022-12-13 16:15:26,252 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 151 transitions, 1329 flow [2022-12-13 16:15:26,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 714.75) internal successors, (2859), 4 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:15:26,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:15:26,252 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-12-13 16:15:26,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 16:15:26,253 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:15:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash 444835967, now seen corresponding path program 1 times [2022-12-13 16:15:26,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:26,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643510642] [2022-12-13 16:15:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:26,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:15:28,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:28,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643510642] [2022-12-13 16:15:28,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643510642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:15:28,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272608118] [2022-12-13 16:15:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:28,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:15:28,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:15:28,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:15:28,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_727a36f3-c9de-4407-a44f-4777184f43eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:15:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:28,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 16:15:28,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:15:29,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:15:29,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 288 [2022-12-13 16:15:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:15:29,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:15:43,577 WARN L233 SmtUtils]: Spent 9.95s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:15:45,097 INFO L321 Elim1Store]: treesize reduction 132, result has 72.5 percent of original size [2022-12-13 16:15:45,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 166 treesize of output 445 [2022-12-13 16:15:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 16:15:46,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272608118] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:15:46,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:15:46,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 13] total 36 [2022-12-13 16:15:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984873518] [2022-12-13 16:15:46,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:15:46,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 16:15:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 16:15:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1144, Unknown=1, NotChecked=0, Total=1332 [2022-12-13 16:15:48,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:15:50,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:15:52,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:15:54,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:15:56,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:15:59,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:01,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:03,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:05,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:07,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:09,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:12,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:14,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:16,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:18,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:21,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:23,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:25,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:27,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:29,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:31,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:34,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:35,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:38,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:40,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:42,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:44,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:46,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:48,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:51,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:53,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:55,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:16:57,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:00,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:02,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:04,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:06,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:08,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:11,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:13,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:15,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:17,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:19,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:21,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:24,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:26,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:28,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:30,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:32,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:35,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:37,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:39,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:41,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:43,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:45,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:47,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:49,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:49,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 589 out of 1711 [2022-12-13 16:17:49,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 151 transitions, 1329 flow. Second operand has 37 states, 37 states have (on average 591.2702702702703) internal successors, (21877), 37 states have internal predecessors, (21877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:17:49,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:17:49,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 589 of 1711 [2022-12-13 16:17:49,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:17:55,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:17:57,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:18:00,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:18:02,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:18:31,933 WARN L233 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 88 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:18:45,957 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 69 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:19:00,796 WARN L233 SmtUtils]: Spent 8.43s on a formula simplification. DAG size of input: 108 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:19:20,510 WARN L233 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 89 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:19:31,116 WARN L233 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 126 DAG size of output: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)