./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:27:11,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:27:11,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:27:11,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:27:11,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:27:11,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:27:11,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:27:11,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:27:11,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:27:11,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:27:11,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:27:11,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:27:11,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:27:11,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:27:11,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:27:11,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:27:11,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:27:11,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:27:11,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:27:11,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:27:11,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:27:11,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:27:11,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:27:11,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:27:11,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:27:11,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:27:11,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:27:11,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:27:11,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:27:11,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:27:11,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:27:11,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:27:11,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:27:11,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:27:11,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:27:11,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:27:11,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:27:11,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:27:11,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:27:11,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:27:11,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:27:11,998 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:27:12,019 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:27:12,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:27:12,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:27:12,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:27:12,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:27:12,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:27:12,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:27:12,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:27:12,023 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:27:12,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:27:12,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:27:12,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:27:12,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:27:12,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:27:12,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:27:12,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:27:12,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:27:12,026 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:27:12,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:27:12,027 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:27:12,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:27:12,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:27:12,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:27:12,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:27:12,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:27:12,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:27:12,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:27:12,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:27:12,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:27:12,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:27:12,030 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:27:12,031 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:27:12,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:27:12,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-11-20 12:27:12,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:27:12,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:27:12,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:27:12,415 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:27:12,417 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:27:12,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-20 12:27:15,474 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:27:15,662 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:27:15,663 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-20 12:27:15,668 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/data/01ddc3a8e/c592c76ceaaa4a35a54e4630442d6895/FLAGd5261d25b [2022-11-20 12:27:15,684 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/data/01ddc3a8e/c592c76ceaaa4a35a54e4630442d6895 [2022-11-20 12:27:15,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:27:15,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:27:15,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:27:15,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:27:15,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:27:15,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:15,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55de01fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15, skipping insertion in model container [2022-11-20 12:27:15,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:15,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:27:15,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:27:15,918 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_3360f99b-e492-4243-913b-437fffbfa33a/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-20 12:27:15,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:27:15,938 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:27:15,973 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_3360f99b-e492-4243-913b-437fffbfa33a/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-20 12:27:15,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:27:15,998 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:27:15,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15 WrapperNode [2022-11-20 12:27:15,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:27:16,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:27:16,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:27:16,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:27:16,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,053 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-11-20 12:27:16,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:27:16,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:27:16,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:27:16,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:27:16,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,088 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:27:16,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:27:16,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:27:16,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:27:16,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (1/1) ... [2022-11-20 12:27:16,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:27:16,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:16,147 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:27:16,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:27:16,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:27:16,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:27:16,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:27:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:27:16,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:27:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:27:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:27:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:27:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 12:27:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 12:27:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:27:16,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:27:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:27:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:27:16,214 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:27:16,334 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:27:16,336 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:27:16,604 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:27:16,677 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:27:16,689 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 12:27:16,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:27:16 BoogieIcfgContainer [2022-11-20 12:27:16,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:27:16,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:27:16,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:27:16,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:27:16,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:27:15" (1/3) ... [2022-11-20 12:27:16,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f308ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:27:16, skipping insertion in model container [2022-11-20 12:27:16,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:27:15" (2/3) ... [2022-11-20 12:27:16,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f308ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:27:16, skipping insertion in model container [2022-11-20 12:27:16,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:27:16" (3/3) ... [2022-11-20 12:27:16,710 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-11-20 12:27:16,720 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:27:16,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:27:16,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:27:16,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:27:16,850 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:27:16,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-11-20 12:27:17,001 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-20 12:27:17,004 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:27:17,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-20 12:27:17,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-11-20 12:27:17,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-11-20 12:27:17,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:27:17,040 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;@1a2af607, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:27:17,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 12:27:17,064 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-11-20 12:27:17,065 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:27:17,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:17,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:17,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:17,072 INFO L85 PathProgramCache]: Analyzing trace with hash 8248533, now seen corresponding path program 1 times [2022-11-20 12:27:17,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:17,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024215183] [2022-11-20 12:27:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:17,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:17,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:17,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024215183] [2022-11-20 12:27:17,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024215183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:17,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:17,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:27:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693661281] [2022-11-20 12:27:17,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:27:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:27:17,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:27:17,474 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2022-11-20 12:27:17,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:17,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:17,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2022-11-20 12:27:17,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:17,568 INFO L130 PetriNetUnfolder]: 11/107 cut-off events. [2022-11-20 12:27:17,568 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-11-20 12:27:17,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-11-20 12:27:17,572 INFO L137 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2022-11-20 12:27:17,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2022-11-20 12:27:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:27:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:27:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-11-20 12:27:17,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2022-11-20 12:27:17,589 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-11-20 12:27:17,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-11-20 12:27:17,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:17,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-11-20 12:27:17,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:17,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:17,609 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:17,611 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2022-11-20 12:27:17,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2022-11-20 12:27:17,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:27:17,629 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2022-11-20 12:27:17,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-11-20 12:27:17,638 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-11-20 12:27:17,639 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2022-11-20 12:27:17,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:17,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:17,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:27:17,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:17,643 INFO L85 PathProgramCache]: Analyzing trace with hash -989012563, now seen corresponding path program 1 times [2022-11-20 12:27:17,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:17,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232177248] [2022-11-20 12:27:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:17,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:18,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:18,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232177248] [2022-11-20 12:27:18,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232177248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:18,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:18,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 12:27:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697317420] [2022-11-20 12:27:18,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:18,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:27:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:27:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:27:18,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-20 12:27:18,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:18,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:18,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-20 12:27:18,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:19,303 INFO L130 PetriNetUnfolder]: 68/258 cut-off events. [2022-11-20 12:27:19,304 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 12:27:19,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 258 events. 68/258 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1049 event pairs, 16 based on Foata normal form. 8/236 useless extension candidates. Maximal degree in co-relation 430. Up to 101 conditions per place. [2022-11-20 12:27:19,307 INFO L137 encePairwiseOnDemand]: 76/89 looper letters, 40 selfloop transitions, 7 changer transitions 11/101 dead transitions. [2022-11-20 12:27:19,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 101 transitions, 330 flow [2022-11-20 12:27:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:27:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 12:27:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 699 transitions. [2022-11-20 12:27:19,311 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6544943820224719 [2022-11-20 12:27:19,311 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 699 transitions. [2022-11-20 12:27:19,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 699 transitions. [2022-11-20 12:27:19,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:19,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 699 transitions. [2022-11-20 12:27:19,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.25) internal successors, (699), 12 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:19,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:19,323 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:19,323 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 699 transitions. [2022-11-20 12:27:19,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 101 transitions, 330 flow [2022-11-20 12:27:19,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:27:19,327 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 194 flow [2022-11-20 12:27:19,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=194, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2022-11-20 12:27:19,329 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2022-11-20 12:27:19,329 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 194 flow [2022-11-20 12:27:19,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:19,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:19,331 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:27:19,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1809878765, now seen corresponding path program 2 times [2022-11-20 12:27:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:19,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845768515] [2022-11-20 12:27:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:19,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845768515] [2022-11-20 12:27:19,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845768515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:19,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:19,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 12:27:19,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246565274] [2022-11-20 12:27:19,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:19,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:27:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:27:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:27:19,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-20 12:27:19,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:19,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:19,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-20 12:27:19,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:20,473 INFO L130 PetriNetUnfolder]: 65/255 cut-off events. [2022-11-20 12:27:20,473 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2022-11-20 12:27:20,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 255 events. 65/255 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1021 event pairs, 39 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 528. Up to 102 conditions per place. [2022-11-20 12:27:20,479 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 41 selfloop transitions, 11 changer transitions 8/103 dead transitions. [2022-11-20 12:27:20,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 103 transitions, 422 flow [2022-11-20 12:27:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:27:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 12:27:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 697 transitions. [2022-11-20 12:27:20,482 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6526217228464419 [2022-11-20 12:27:20,483 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 697 transitions. [2022-11-20 12:27:20,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 697 transitions. [2022-11-20 12:27:20,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:20,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 697 transitions. [2022-11-20 12:27:20,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.083333333333336) internal successors, (697), 12 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:20,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:20,489 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:20,490 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 194 flow. Second operand 12 states and 697 transitions. [2022-11-20 12:27:20,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 103 transitions, 422 flow [2022-11-20 12:27:20,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 103 transitions, 385 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-11-20 12:27:20,499 INFO L231 Difference]: Finished difference. Result has 97 places, 80 transitions, 244 flow [2022-11-20 12:27:20,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=244, PETRI_PLACES=97, PETRI_TRANSITIONS=80} [2022-11-20 12:27:20,501 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 18 predicate places. [2022-11-20 12:27:20,502 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 244 flow [2022-11-20 12:27:20,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:20,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:20,503 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:20,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:27:20,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:20,504 INFO L85 PathProgramCache]: Analyzing trace with hash 521887829, now seen corresponding path program 3 times [2022-11-20 12:27:20,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334027785] [2022-11-20 12:27:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:20,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:21,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:21,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334027785] [2022-11-20 12:27:21,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334027785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:21,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:21,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 12:27:21,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345979634] [2022-11-20 12:27:21,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:21,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:27:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:27:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:27:21,085 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-20 12:27:21,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 80 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:21,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:21,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-20 12:27:21,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:21,296 INFO L130 PetriNetUnfolder]: 72/299 cut-off events. [2022-11-20 12:27:21,296 INFO L131 PetriNetUnfolder]: For 153/165 co-relation queries the response was YES. [2022-11-20 12:27:21,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 299 events. 72/299 cut-off events. For 153/165 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1363 event pairs, 35 based on Foata normal form. 4/297 useless extension candidates. Maximal degree in co-relation 651. Up to 105 conditions per place. [2022-11-20 12:27:21,299 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 7/112 dead transitions. [2022-11-20 12:27:21,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 504 flow [2022-11-20 12:27:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:27:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 12:27:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 701 transitions. [2022-11-20 12:27:21,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6563670411985019 [2022-11-20 12:27:21,302 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 701 transitions. [2022-11-20 12:27:21,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 701 transitions. [2022-11-20 12:27:21,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:21,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 701 transitions. [2022-11-20 12:27:21,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.416666666666664) internal successors, (701), 12 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:21,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:21,308 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:21,308 INFO L175 Difference]: Start difference. First operand has 97 places, 80 transitions, 244 flow. Second operand 12 states and 701 transitions. [2022-11-20 12:27:21,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 504 flow [2022-11-20 12:27:21,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 112 transitions, 469 flow, removed 11 selfloop flow, removed 7 redundant places. [2022-11-20 12:27:21,313 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 307 flow [2022-11-20 12:27:21,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=307, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2022-11-20 12:27:21,314 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2022-11-20 12:27:21,314 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 307 flow [2022-11-20 12:27:21,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:21,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:21,315 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:27:21,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash 751272271, now seen corresponding path program 4 times [2022-11-20 12:27:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:21,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409971742] [2022-11-20 12:27:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:21,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409971742] [2022-11-20 12:27:21,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409971742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:21,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:21,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 12:27:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972478517] [2022-11-20 12:27:21,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:21,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:27:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:27:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:27:21,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-20 12:27:21,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:21,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:21,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-20 12:27:21,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:22,190 INFO L130 PetriNetUnfolder]: 70/297 cut-off events. [2022-11-20 12:27:22,190 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-20 12:27:22,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 297 events. 70/297 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1361 event pairs, 40 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 681. Up to 105 conditions per place. [2022-11-20 12:27:22,194 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 46 selfloop transitions, 15 changer transitions 9/113 dead transitions. [2022-11-20 12:27:22,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 557 flow [2022-11-20 12:27:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:27:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 12:27:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 702 transitions. [2022-11-20 12:27:22,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2022-11-20 12:27:22,197 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 702 transitions. [2022-11-20 12:27:22,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 702 transitions. [2022-11-20 12:27:22,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:22,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 702 transitions. [2022-11-20 12:27:22,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.5) internal successors, (702), 12 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:22,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:22,204 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:22,205 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 307 flow. Second operand 12 states and 702 transitions. [2022-11-20 12:27:22,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 113 transitions, 557 flow [2022-11-20 12:27:22,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 516 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-11-20 12:27:22,212 INFO L231 Difference]: Finished difference. Result has 109 places, 85 transitions, 339 flow [2022-11-20 12:27:22,213 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=339, PETRI_PLACES=109, PETRI_TRANSITIONS=85} [2022-11-20 12:27:22,215 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 30 predicate places. [2022-11-20 12:27:22,215 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 85 transitions, 339 flow [2022-11-20 12:27:22,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:22,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:22,216 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:22,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:27:22,217 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:22,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:22,218 INFO L85 PathProgramCache]: Analyzing trace with hash -92412107, now seen corresponding path program 5 times [2022-11-20 12:27:22,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:22,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761806527] [2022-11-20 12:27:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:22,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:22,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:22,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761806527] [2022-11-20 12:27:22,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761806527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:22,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:22,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 12:27:22,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597193387] [2022-11-20 12:27:22,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:22,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:27:22,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:27:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:27:22,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-20 12:27:22,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 85 transitions, 339 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:22,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:22,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-20 12:27:22,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:23,195 INFO L130 PetriNetUnfolder]: 68/274 cut-off events. [2022-11-20 12:27:23,195 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2022-11-20 12:27:23,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 274 events. 68/274 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1187 event pairs, 38 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 647. Up to 105 conditions per place. [2022-11-20 12:27:23,198 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 15 changer transitions 8/108 dead transitions. [2022-11-20 12:27:23,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 108 transitions, 556 flow [2022-11-20 12:27:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:27:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 12:27:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 697 transitions. [2022-11-20 12:27:23,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6526217228464419 [2022-11-20 12:27:23,201 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 697 transitions. [2022-11-20 12:27:23,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 697 transitions. [2022-11-20 12:27:23,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:23,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 697 transitions. [2022-11-20 12:27:23,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.083333333333336) internal successors, (697), 12 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:23,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:23,206 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:23,206 INFO L175 Difference]: Start difference. First operand has 109 places, 85 transitions, 339 flow. Second operand 12 states and 697 transitions. [2022-11-20 12:27:23,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 108 transitions, 556 flow [2022-11-20 12:27:23,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 108 transitions, 510 flow, removed 12 selfloop flow, removed 9 redundant places. [2022-11-20 12:27:23,211 INFO L231 Difference]: Finished difference. Result has 112 places, 85 transitions, 346 flow [2022-11-20 12:27:23,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=346, PETRI_PLACES=112, PETRI_TRANSITIONS=85} [2022-11-20 12:27:23,214 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 33 predicate places. [2022-11-20 12:27:23,214 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 85 transitions, 346 flow [2022-11-20 12:27:23,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:23,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:23,215 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:23,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:27:23,216 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1623942775, now seen corresponding path program 6 times [2022-11-20 12:27:23,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:23,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647586736] [2022-11-20 12:27:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:23,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:23,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647586736] [2022-11-20 12:27:23,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647586736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:23,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:23,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 12:27:23,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006112155] [2022-11-20 12:27:23,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:23,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:27:23,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:27:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:27:23,730 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-20 12:27:23,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 85 transitions, 346 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:23,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:23,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-20 12:27:23,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:24,165 INFO L130 PetriNetUnfolder]: 66/239 cut-off events. [2022-11-20 12:27:24,165 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2022-11-20 12:27:24,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 239 events. 66/239 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 893 event pairs, 32 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 585. Up to 105 conditions per place. [2022-11-20 12:27:24,167 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 15 changer transitions 8/100 dead transitions. [2022-11-20 12:27:24,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 100 transitions, 517 flow [2022-11-20 12:27:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:27:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 12:27:24,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 689 transitions. [2022-11-20 12:27:24,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6451310861423221 [2022-11-20 12:27:24,170 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 689 transitions. [2022-11-20 12:27:24,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 689 transitions. [2022-11-20 12:27:24,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:24,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 689 transitions. [2022-11-20 12:27:24,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.416666666666664) internal successors, (689), 12 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:24,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:24,182 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:24,183 INFO L175 Difference]: Start difference. First operand has 112 places, 85 transitions, 346 flow. Second operand 12 states and 689 transitions. [2022-11-20 12:27:24,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 100 transitions, 517 flow [2022-11-20 12:27:24,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 100 transitions, 471 flow, removed 9 selfloop flow, removed 11 redundant places. [2022-11-20 12:27:24,187 INFO L231 Difference]: Finished difference. Result has 112 places, 85 transitions, 348 flow [2022-11-20 12:27:24,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=348, PETRI_PLACES=112, PETRI_TRANSITIONS=85} [2022-11-20 12:27:24,188 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 33 predicate places. [2022-11-20 12:27:24,188 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 85 transitions, 348 flow [2022-11-20 12:27:24,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:24,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:24,202 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:24,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:27:24,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1492579821, now seen corresponding path program 1 times [2022-11-20 12:27:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:24,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020069052] [2022-11-20 12:27:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:24,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020069052] [2022-11-20 12:27:24,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020069052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:24,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352596547] [2022-11-20 12:27:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:24,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:24,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:24,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:24,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:27:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:27:24,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:25,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:26,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352596547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:26,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:26,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-20 12:27:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458014021] [2022-11-20 12:27:26,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:26,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:27:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:26,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:27:26,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:27:26,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:27:26,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 85 transitions, 348 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:26,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:26,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:27:26,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:28,816 INFO L130 PetriNetUnfolder]: 168/592 cut-off events. [2022-11-20 12:27:28,816 INFO L131 PetriNetUnfolder]: For 507/507 co-relation queries the response was YES. [2022-11-20 12:27:28,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 592 events. 168/592 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3253 event pairs, 9 based on Foata normal form. 13/605 useless extension candidates. Maximal degree in co-relation 1356. Up to 111 conditions per place. [2022-11-20 12:27:28,821 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2022-11-20 12:27:28,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 251 transitions, 1392 flow [2022-11-20 12:27:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 12:27:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-20 12:27:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2022-11-20 12:27:28,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2022-11-20 12:27:28,829 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2022-11-20 12:27:28,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2022-11-20 12:27:28,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:28,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2022-11-20 12:27:28,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:28,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:28,846 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:28,846 INFO L175 Difference]: Start difference. First operand has 112 places, 85 transitions, 348 flow. Second operand 48 states and 2702 transitions. [2022-11-20 12:27:28,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 251 transitions, 1392 flow [2022-11-20 12:27:28,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1258 flow, removed 42 selfloop flow, removed 14 redundant places. [2022-11-20 12:27:28,854 INFO L231 Difference]: Finished difference. Result has 152 places, 152 transitions, 782 flow [2022-11-20 12:27:28,854 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=782, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2022-11-20 12:27:28,855 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2022-11-20 12:27:28,855 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 782 flow [2022-11-20 12:27:28,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:28,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:28,856 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:28,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:29,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:29,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:29,063 INFO L85 PathProgramCache]: Analyzing trace with hash -748226027, now seen corresponding path program 2 times [2022-11-20 12:27:29,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:29,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651549620] [2022-11-20 12:27:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:29,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:29,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:29,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651549620] [2022-11-20 12:27:29,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651549620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:29,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127678532] [2022-11-20 12:27:29,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:27:29,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:29,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:29,713 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:29,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:27:29,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:27:29,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:27:29,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:27:29,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:30,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:31,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127678532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:31,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:31,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-20 12:27:31,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612564140] [2022-11-20 12:27:31,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:31,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:27:31,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:31,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:27:31,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:27:31,131 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:27:31,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 782 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:31,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:31,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:27:31,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:33,119 INFO L130 PetriNetUnfolder]: 210/758 cut-off events. [2022-11-20 12:27:33,120 INFO L131 PetriNetUnfolder]: For 753/767 co-relation queries the response was YES. [2022-11-20 12:27:33,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 758 events. 210/758 cut-off events. For 753/767 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4631 event pairs, 27 based on Foata normal form. 5/761 useless extension candidates. Maximal degree in co-relation 2112. Up to 213 conditions per place. [2022-11-20 12:27:33,128 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 122 changer transitions 6/270 dead transitions. [2022-11-20 12:27:33,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 1857 flow [2022-11-20 12:27:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 12:27:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 12:27:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2022-11-20 12:27:33,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2022-11-20 12:27:33,132 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2022-11-20 12:27:33,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2022-11-20 12:27:33,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:33,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2022-11-20 12:27:33,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:33,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:33,152 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:33,152 INFO L175 Difference]: Start difference. First operand has 152 places, 152 transitions, 782 flow. Second operand 39 states and 2186 transitions. [2022-11-20 12:27:33,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 1857 flow [2022-11-20 12:27:33,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 1627 flow, removed 102 selfloop flow, removed 9 redundant places. [2022-11-20 12:27:33,174 INFO L231 Difference]: Finished difference. Result has 186 places, 205 transitions, 1273 flow [2022-11-20 12:27:33,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1273, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2022-11-20 12:27:33,175 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2022-11-20 12:27:33,176 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1273 flow [2022-11-20 12:27:33,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:33,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:33,178 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:33,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:33,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:33,383 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:33,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1865169065, now seen corresponding path program 3 times [2022-11-20 12:27:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:33,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213451699] [2022-11-20 12:27:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:33,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:33,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:33,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213451699] [2022-11-20 12:27:33,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213451699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:33,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529879053] [2022-11-20 12:27:33,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:27:33,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:33,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:34,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:34,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:27:34,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:27:34,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:27:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:27:34,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:34,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:35,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529879053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:35,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:35,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-20 12:27:35,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492885888] [2022-11-20 12:27:35,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:35,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:27:35,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:35,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:27:35,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:27:35,298 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:27:35,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1273 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:35,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:35,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:27:35,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:40,475 INFO L130 PetriNetUnfolder]: 280/1049 cut-off events. [2022-11-20 12:27:40,476 INFO L131 PetriNetUnfolder]: For 1419/1421 co-relation queries the response was YES. [2022-11-20 12:27:40,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 1049 events. 280/1049 cut-off events. For 1419/1421 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7326 event pairs, 18 based on Foata normal form. 3/1040 useless extension candidates. Maximal degree in co-relation 3148. Up to 147 conditions per place. [2022-11-20 12:27:40,487 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 158 selfloop transitions, 208 changer transitions 6/414 dead transitions. [2022-11-20 12:27:40,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 414 transitions, 3151 flow [2022-11-20 12:27:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-20 12:27:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-20 12:27:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2022-11-20 12:27:40,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2022-11-20 12:27:40,497 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2022-11-20 12:27:40,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2022-11-20 12:27:40,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:40,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2022-11-20 12:27:40,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:40,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:40,561 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:40,562 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 1273 flow. Second operand 81 states and 4518 transitions. [2022-11-20 12:27:40,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 414 transitions, 3151 flow [2022-11-20 12:27:40,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 414 transitions, 3102 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-11-20 12:27:40,582 INFO L231 Difference]: Finished difference. Result has 271 places, 286 transitions, 2345 flow [2022-11-20 12:27:40,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2345, PETRI_PLACES=271, PETRI_TRANSITIONS=286} [2022-11-20 12:27:40,583 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 192 predicate places. [2022-11-20 12:27:40,583 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 286 transitions, 2345 flow [2022-11-20 12:27:40,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:40,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:40,585 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:40,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 12:27:40,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:27:40,790 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:40,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1050485383, now seen corresponding path program 4 times [2022-11-20 12:27:40,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:40,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268786620] [2022-11-20 12:27:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:40,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:41,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:41,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268786620] [2022-11-20 12:27:41,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268786620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:41,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790193411] [2022-11-20 12:27:41,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:27:41,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:41,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:41,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:41,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:27:41,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:27:41,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:27:41,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:27:41,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:42,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:42,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790193411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:42,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:42,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-20 12:27:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71129669] [2022-11-20 12:27:42,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:27:42,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:27:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:27:42,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:27:42,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 286 transitions, 2345 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:42,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:42,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:27:42,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:47,242 INFO L130 PetriNetUnfolder]: 299/1078 cut-off events. [2022-11-20 12:27:47,242 INFO L131 PetriNetUnfolder]: For 4250/4252 co-relation queries the response was YES. [2022-11-20 12:27:47,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 1078 events. 299/1078 cut-off events. For 4250/4252 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7544 event pairs, 22 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4270. Up to 157 conditions per place. [2022-11-20 12:27:47,256 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 165 selfloop transitions, 232 changer transitions 6/445 dead transitions. [2022-11-20 12:27:47,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 445 transitions, 4319 flow [2022-11-20 12:27:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-20 12:27:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-20 12:27:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4528 transitions. [2022-11-20 12:27:47,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6281037591899015 [2022-11-20 12:27:47,265 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4528 transitions. [2022-11-20 12:27:47,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4528 transitions. [2022-11-20 12:27:47,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:47,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4528 transitions. [2022-11-20 12:27:47,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.901234567901234) internal successors, (4528), 81 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:47,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:47,291 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:47,291 INFO L175 Difference]: Start difference. First operand has 271 places, 286 transitions, 2345 flow. Second operand 81 states and 4528 transitions. [2022-11-20 12:27:47,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 445 transitions, 4319 flow [2022-11-20 12:27:47,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 445 transitions, 4068 flow, removed 68 selfloop flow, removed 19 redundant places. [2022-11-20 12:27:47,327 INFO L231 Difference]: Finished difference. Result has 337 places, 319 transitions, 3001 flow [2022-11-20 12:27:47,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3001, PETRI_PLACES=337, PETRI_TRANSITIONS=319} [2022-11-20 12:27:47,328 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 258 predicate places. [2022-11-20 12:27:47,328 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 319 transitions, 3001 flow [2022-11-20 12:27:47,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:47,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:47,329 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:47,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:47,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 12:27:47,536 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:47,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash -974553547, now seen corresponding path program 5 times [2022-11-20 12:27:47,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:47,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450457393] [2022-11-20 12:27:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:47,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:48,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:48,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450457393] [2022-11-20 12:27:48,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450457393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:48,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454533385] [2022-11-20 12:27:48,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:27:48,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:48,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:48,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:48,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:27:48,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:27:48,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:27:48,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:27:48,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:48,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:49,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454533385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:49,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:49,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-20 12:27:49,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664884521] [2022-11-20 12:27:49,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:49,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 12:27:49,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 12:27:49,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:27:49,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:27:49,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 319 transitions, 3001 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:49,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:49,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:27:49,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:51,216 INFO L130 PetriNetUnfolder]: 300/1119 cut-off events. [2022-11-20 12:27:51,217 INFO L131 PetriNetUnfolder]: For 6095/6095 co-relation queries the response was YES. [2022-11-20 12:27:51,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4942 conditions, 1119 events. 300/1119 cut-off events. For 6095/6095 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7997 event pairs, 31 based on Foata normal form. 2/1116 useless extension candidates. Maximal degree in co-relation 4888. Up to 387 conditions per place. [2022-11-20 12:27:51,232 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 127 selfloop transitions, 190 changer transitions 12/371 dead transitions. [2022-11-20 12:27:51,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 371 transitions, 4121 flow [2022-11-20 12:27:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 12:27:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-20 12:27:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-11-20 12:27:51,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-11-20 12:27:51,236 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-11-20 12:27:51,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-11-20 12:27:51,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:51,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-11-20 12:27:51,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:51,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:51,246 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:51,246 INFO L175 Difference]: Start difference. First operand has 337 places, 319 transitions, 3001 flow. Second operand 33 states and 1827 transitions. [2022-11-20 12:27:51,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 371 transitions, 4121 flow [2022-11-20 12:27:51,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 371 transitions, 3682 flow, removed 46 selfloop flow, removed 56 redundant places. [2022-11-20 12:27:51,298 INFO L231 Difference]: Finished difference. Result has 321 places, 333 transitions, 3319 flow [2022-11-20 12:27:51,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3319, PETRI_PLACES=321, PETRI_TRANSITIONS=333} [2022-11-20 12:27:51,300 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 242 predicate places. [2022-11-20 12:27:51,300 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 333 transitions, 3319 flow [2022-11-20 12:27:51,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:51,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:51,302 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:51,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:51,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:51,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:51,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1819115727, now seen corresponding path program 6 times [2022-11-20 12:27:51,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:51,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954732649] [2022-11-20 12:27:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:51,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:51,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:51,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954732649] [2022-11-20 12:27:51,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954732649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:51,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804008358] [2022-11-20 12:27:51,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:27:51,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:51,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:51,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:51,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:27:52,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 12:27:52,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:27:52,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:27:52,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:52,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:53,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804008358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:53,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:27:53,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-20 12:27:53,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303081485] [2022-11-20 12:27:53,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 12:27:53,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:27:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 12:27:53,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:27:53,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:27:53,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 333 transitions, 3319 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:53,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:27:53,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:27:53,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:27:58,564 INFO L130 PetriNetUnfolder]: 494/1674 cut-off events. [2022-11-20 12:27:58,565 INFO L131 PetriNetUnfolder]: For 10688/10688 co-relation queries the response was YES. [2022-11-20 12:27:58,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8092 conditions, 1674 events. 494/1674 cut-off events. For 10688/10688 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13112 event pairs, 21 based on Foata normal form. 1/1666 useless extension candidates. Maximal degree in co-relation 8027. Up to 414 conditions per place. [2022-11-20 12:27:58,587 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 173 selfloop transitions, 380 changer transitions 6/601 dead transitions. [2022-11-20 12:27:58,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 601 transitions, 7368 flow [2022-11-20 12:27:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-20 12:27:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-20 12:27:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3882 transitions. [2022-11-20 12:27:58,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6231139646869984 [2022-11-20 12:27:58,594 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3882 transitions. [2022-11-20 12:27:58,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3882 transitions. [2022-11-20 12:27:58,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:27:58,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3882 transitions. [2022-11-20 12:27:58,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.457142857142856) internal successors, (3882), 70 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:58,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:58,613 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:58,613 INFO L175 Difference]: Start difference. First operand has 321 places, 333 transitions, 3319 flow. Second operand 70 states and 3882 transitions. [2022-11-20 12:27:58,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 601 transitions, 7368 flow [2022-11-20 12:27:58,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 601 transitions, 7000 flow, removed 55 selfloop flow, removed 20 redundant places. [2022-11-20 12:27:58,693 INFO L231 Difference]: Finished difference. Result has 382 places, 526 transitions, 6695 flow [2022-11-20 12:27:58,694 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=6695, PETRI_PLACES=382, PETRI_TRANSITIONS=526} [2022-11-20 12:27:58,695 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 303 predicate places. [2022-11-20 12:27:58,695 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 526 transitions, 6695 flow [2022-11-20 12:27:58,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:58,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:27:58,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:58,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:58,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:58,902 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:27:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:58,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1266148075, now seen corresponding path program 7 times [2022-11-20 12:27:58,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:27:58,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237664983] [2022-11-20 12:27:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:58,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:27:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:59,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:27:59,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237664983] [2022-11-20 12:27:59,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237664983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:27:59,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833854738] [2022-11-20 12:27:59,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:27:59,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:27:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:27:59,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:27:59,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:27:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:59,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:27:59,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:00,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:00,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833854738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:00,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:00,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-20 12:28:00,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615198375] [2022-11-20 12:28:00,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:00,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 12:28:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:00,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 12:28:00,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:28:00,678 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:28:00,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 526 transitions, 6695 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:00,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:00,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:28:00,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:07,447 INFO L130 PetriNetUnfolder]: 675/2316 cut-off events. [2022-11-20 12:28:07,447 INFO L131 PetriNetUnfolder]: For 20366/20366 co-relation queries the response was YES. [2022-11-20 12:28:07,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12621 conditions, 2316 events. 675/2316 cut-off events. For 20366/20366 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20164 event pairs, 21 based on Foata normal form. 2/2309 useless extension candidates. Maximal degree in co-relation 12544. Up to 412 conditions per place. [2022-11-20 12:28:07,483 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 191 selfloop transitions, 585 changer transitions 13/831 dead transitions. [2022-11-20 12:28:07,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 831 transitions, 12073 flow [2022-11-20 12:28:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 12:28:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-11-20 12:28:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5261 transitions. [2022-11-20 12:28:07,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6222353636901242 [2022-11-20 12:28:07,491 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5261 transitions. [2022-11-20 12:28:07,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5261 transitions. [2022-11-20 12:28:07,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:07,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5261 transitions. [2022-11-20 12:28:07,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 55.37894736842105) internal successors, (5261), 95 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,516 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 89.0) internal successors, (8544), 96 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,516 INFO L175 Difference]: Start difference. First operand has 382 places, 526 transitions, 6695 flow. Second operand 95 states and 5261 transitions. [2022-11-20 12:28:07,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 831 transitions, 12073 flow [2022-11-20 12:28:07,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 831 transitions, 11343 flow, removed 303 selfloop flow, removed 19 redundant places. [2022-11-20 12:28:07,678 INFO L231 Difference]: Finished difference. Result has 475 places, 724 transitions, 10672 flow [2022-11-20 12:28:07,678 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=6208, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=10672, PETRI_PLACES=475, PETRI_TRANSITIONS=724} [2022-11-20 12:28:07,678 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 396 predicate places. [2022-11-20 12:28:07,679 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 724 transitions, 10672 flow [2022-11-20 12:28:07,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:07,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:07,680 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:07,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:07,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 12:28:07,885 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:07,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1144281925, now seen corresponding path program 8 times [2022-11-20 12:28:07,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:07,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996234291] [2022-11-20 12:28:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:08,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:08,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996234291] [2022-11-20 12:28:08,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996234291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:08,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557303069] [2022-11-20 12:28:08,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:28:08,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:08,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:08,447 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:08,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:28:08,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:28:08,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:08,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:28:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:09,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:09,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557303069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:09,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:09,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-20 12:28:09,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414096926] [2022-11-20 12:28:09,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:09,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:28:09,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:28:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:28:09,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:28:09,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 724 transitions, 10672 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:09,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:09,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:28:09,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:13,851 INFO L130 PetriNetUnfolder]: 796/2713 cut-off events. [2022-11-20 12:28:13,852 INFO L131 PetriNetUnfolder]: For 36803/36803 co-relation queries the response was YES. [2022-11-20 12:28:13,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16220 conditions, 2713 events. 796/2713 cut-off events. For 36803/36803 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24550 event pairs, 36 based on Foata normal form. 2/2666 useless extension candidates. Maximal degree in co-relation 16126. Up to 554 conditions per place. [2022-11-20 12:28:13,883 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 312 selfloop transitions, 570 changer transitions 12/936 dead transitions. [2022-11-20 12:28:13,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 936 transitions, 15205 flow [2022-11-20 12:28:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 12:28:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-20 12:28:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3584 transitions. [2022-11-20 12:28:13,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6292134831460674 [2022-11-20 12:28:13,891 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3584 transitions. [2022-11-20 12:28:13,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3584 transitions. [2022-11-20 12:28:13,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:13,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3584 transitions. [2022-11-20 12:28:13,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.0) internal successors, (3584), 64 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) [2022-11-20 12:28:13,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:13,911 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 89.0) internal successors, (5785), 65 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:13,911 INFO L175 Difference]: Start difference. First operand has 475 places, 724 transitions, 10672 flow. Second operand 64 states and 3584 transitions. [2022-11-20 12:28:13,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 936 transitions, 15205 flow [2022-11-20 12:28:14,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 936 transitions, 14223 flow, removed 394 selfloop flow, removed 25 redundant places. [2022-11-20 12:28:14,192 INFO L231 Difference]: Finished difference. Result has 515 places, 844 transitions, 13514 flow [2022-11-20 12:28:14,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=9989, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=13514, PETRI_PLACES=515, PETRI_TRANSITIONS=844} [2022-11-20 12:28:14,193 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 436 predicate places. [2022-11-20 12:28:14,193 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 844 transitions, 13514 flow [2022-11-20 12:28:14,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:14,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:14,194 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:14,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:14,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:28:14,394 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:14,395 INFO L85 PathProgramCache]: Analyzing trace with hash -156948061, now seen corresponding path program 9 times [2022-11-20 12:28:14,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:14,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552144615] [2022-11-20 12:28:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:14,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:14,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552144615] [2022-11-20 12:28:14,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552144615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:14,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496746474] [2022-11-20 12:28:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:28:14,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:14,864 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:14,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:28:14,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:28:14,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:28:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:15,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:16,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496746474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:16,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:16,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-20 12:28:16,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321861170] [2022-11-20 12:28:16,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:16,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 12:28:16,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 12:28:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:28:16,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:28:16,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 844 transitions, 13514 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:16,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:16,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:28:16,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:18,649 INFO L130 PetriNetUnfolder]: 798/2978 cut-off events. [2022-11-20 12:28:18,649 INFO L131 PetriNetUnfolder]: For 44193/44198 co-relation queries the response was YES. [2022-11-20 12:28:18,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17973 conditions, 2978 events. 798/2978 cut-off events. For 44193/44198 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28303 event pairs, 64 based on Foata normal form. 5/2964 useless extension candidates. Maximal degree in co-relation 17876. Up to 1060 conditions per place. [2022-11-20 12:28:18,686 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 350 selfloop transitions, 488 changer transitions 6/886 dead transitions. [2022-11-20 12:28:18,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 886 transitions, 15685 flow [2022-11-20 12:28:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 12:28:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 12:28:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2022-11-20 12:28:18,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2022-11-20 12:28:18,690 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2022-11-20 12:28:18,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2022-11-20 12:28:18,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:18,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2022-11-20 12:28:18,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:18,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:18,700 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:18,701 INFO L175 Difference]: Start difference. First operand has 515 places, 844 transitions, 13514 flow. Second operand 32 states and 1783 transitions. [2022-11-20 12:28:18,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 886 transitions, 15685 flow [2022-11-20 12:28:19,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 886 transitions, 15054 flow, removed 95 selfloop flow, removed 31 redundant places. [2022-11-20 12:28:19,108 INFO L231 Difference]: Finished difference. Result has 514 places, 854 transitions, 14563 flow [2022-11-20 12:28:19,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=12913, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14563, PETRI_PLACES=514, PETRI_TRANSITIONS=854} [2022-11-20 12:28:19,109 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 435 predicate places. [2022-11-20 12:28:19,110 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 854 transitions, 14563 flow [2022-11-20 12:28:19,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:19,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:19,111 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:19,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 12:28:19,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 12:28:19,317 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:19,317 INFO L85 PathProgramCache]: Analyzing trace with hash -937348191, now seen corresponding path program 10 times [2022-11-20 12:28:19,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:19,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90100261] [2022-11-20 12:28:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:19,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90100261] [2022-11-20 12:28:19,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90100261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852080185] [2022-11-20 12:28:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:28:19,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:19,886 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:19,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:28:19,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:28:19,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:28:19,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:20,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:21,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852080185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:21,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:21,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-20 12:28:21,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772323516] [2022-11-20 12:28:21,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:21,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:28:21,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:21,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:28:21,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:28:21,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:28:21,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 854 transitions, 14563 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:21,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:21,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:28:21,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:23,293 INFO L130 PetriNetUnfolder]: 798/2956 cut-off events. [2022-11-20 12:28:23,294 INFO L131 PetriNetUnfolder]: For 39263/39275 co-relation queries the response was YES. [2022-11-20 12:28:23,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18137 conditions, 2956 events. 798/2956 cut-off events. For 39263/39275 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27973 event pairs, 94 based on Foata normal form. 4/2936 useless extension candidates. Maximal degree in co-relation 18034. Up to 1071 conditions per place. [2022-11-20 12:28:23,327 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 380 selfloop transitions, 452 changer transitions 6/880 dead transitions. [2022-11-20 12:28:23,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 880 transitions, 16565 flow [2022-11-20 12:28:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 12:28:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-20 12:28:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2022-11-20 12:28:23,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2022-11-20 12:28:23,330 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2022-11-20 12:28:23,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2022-11-20 12:28:23,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:23,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2022-11-20 12:28:23,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:23,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:23,336 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:23,336 INFO L175 Difference]: Start difference. First operand has 514 places, 854 transitions, 14563 flow. Second operand 27 states and 1503 transitions. [2022-11-20 12:28:23,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 880 transitions, 16565 flow [2022-11-20 12:28:23,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 880 transitions, 16455 flow, removed 14 selfloop flow, removed 18 redundant places. [2022-11-20 12:28:23,658 INFO L231 Difference]: Finished difference. Result has 523 places, 856 transitions, 15822 flow [2022-11-20 12:28:23,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=14442, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15822, PETRI_PLACES=523, PETRI_TRANSITIONS=856} [2022-11-20 12:28:23,660 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 444 predicate places. [2022-11-20 12:28:23,660 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 856 transitions, 15822 flow [2022-11-20 12:28:23,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:23,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:23,661 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:23,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:23,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:28:23,866 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:23,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:23,866 INFO L85 PathProgramCache]: Analyzing trace with hash -534739235, now seen corresponding path program 11 times [2022-11-20 12:28:23,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:23,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778374484] [2022-11-20 12:28:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:23,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:24,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778374484] [2022-11-20 12:28:24,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778374484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215668491] [2022-11-20 12:28:24,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:28:24,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:24,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:24,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:24,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:28:24,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:28:24,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:24,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:28:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:25,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:25,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215668491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:25,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:25,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-20 12:28:25,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619634488] [2022-11-20 12:28:25,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:25,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:28:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:28:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:28:25,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:28:25,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 856 transitions, 15822 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:25,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:25,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:28:25,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:28,454 INFO L130 PetriNetUnfolder]: 798/2980 cut-off events. [2022-11-20 12:28:28,455 INFO L131 PetriNetUnfolder]: For 43549/43561 co-relation queries the response was YES. [2022-11-20 12:28:28,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19178 conditions, 2980 events. 798/2980 cut-off events. For 43549/43561 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28305 event pairs, 89 based on Foata normal form. 4/2963 useless extension candidates. Maximal degree in co-relation 19073. Up to 1055 conditions per place. [2022-11-20 12:28:28,495 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 367 selfloop transitions, 479 changer transitions 12/900 dead transitions. [2022-11-20 12:28:28,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 900 transitions, 18048 flow [2022-11-20 12:28:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 12:28:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-20 12:28:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2041 transitions. [2022-11-20 12:28:28,498 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6197995748557547 [2022-11-20 12:28:28,499 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2041 transitions. [2022-11-20 12:28:28,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2041 transitions. [2022-11-20 12:28:28,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:28,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2041 transitions. [2022-11-20 12:28:28,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.16216216216216) internal successors, (2041), 37 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:28,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:28,507 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:28,507 INFO L175 Difference]: Start difference. First operand has 523 places, 856 transitions, 15822 flow. Second operand 37 states and 2041 transitions. [2022-11-20 12:28:28,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 900 transitions, 18048 flow [2022-11-20 12:28:29,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 900 transitions, 17659 flow, removed 7 selfloop flow, removed 17 redundant places. [2022-11-20 12:28:29,039 INFO L231 Difference]: Finished difference. Result has 550 places, 869 transitions, 17006 flow [2022-11-20 12:28:29,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=15442, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17006, PETRI_PLACES=550, PETRI_TRANSITIONS=869} [2022-11-20 12:28:29,040 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 471 predicate places. [2022-11-20 12:28:29,041 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 869 transitions, 17006 flow [2022-11-20 12:28:29,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:29,041 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:29,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:29,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:29,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:28:29,244 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:29,244 INFO L85 PathProgramCache]: Analyzing trace with hash 564448207, now seen corresponding path program 12 times [2022-11-20 12:28:29,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:29,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313916766] [2022-11-20 12:28:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:29,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:29,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313916766] [2022-11-20 12:28:29,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313916766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462981732] [2022-11-20 12:28:29,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:28:29,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:29,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:29,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:29,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:28:29,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 12:28:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:29,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:28:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:30,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:31,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462981732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:31,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:31,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-20 12:28:31,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124521073] [2022-11-20 12:28:31,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:31,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:28:31,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:31,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:28:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:28:31,004 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:28:31,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 869 transitions, 17006 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:31,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:31,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:28:31,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:34,047 INFO L130 PetriNetUnfolder]: 800/3082 cut-off events. [2022-11-20 12:28:34,047 INFO L131 PetriNetUnfolder]: For 51435/51460 co-relation queries the response was YES. [2022-11-20 12:28:34,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20297 conditions, 3082 events. 800/3082 cut-off events. For 51435/51460 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29633 event pairs, 115 based on Foata normal form. 5/3080 useless extension candidates. Maximal degree in co-relation 20179. Up to 1236 conditions per place. [2022-11-20 12:28:34,092 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 356 selfloop transitions, 498 changer transitions 6/902 dead transitions. [2022-11-20 12:28:34,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 902 transitions, 19157 flow [2022-11-20 12:28:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 12:28:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-20 12:28:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-11-20 12:28:34,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-11-20 12:28:34,097 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-11-20 12:28:34,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-11-20 12:28:34,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:34,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-11-20 12:28:34,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:34,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:34,107 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:34,107 INFO L175 Difference]: Start difference. First operand has 550 places, 869 transitions, 17006 flow. Second operand 33 states and 1827 transitions. [2022-11-20 12:28:34,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 902 transitions, 19157 flow [2022-11-20 12:28:34,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 902 transitions, 18698 flow, removed 36 selfloop flow, removed 21 redundant places. [2022-11-20 12:28:34,580 INFO L231 Difference]: Finished difference. Result has 561 places, 877 transitions, 17841 flow [2022-11-20 12:28:34,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=16560, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17841, PETRI_PLACES=561, PETRI_TRANSITIONS=877} [2022-11-20 12:28:34,582 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 482 predicate places. [2022-11-20 12:28:34,582 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 877 transitions, 17841 flow [2022-11-20 12:28:34,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:34,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:34,582 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:34,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:34,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:34,783 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:34,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:34,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2042456693, now seen corresponding path program 13 times [2022-11-20 12:28:34,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:34,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645163463] [2022-11-20 12:28:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:34,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:35,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645163463] [2022-11-20 12:28:35,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645163463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944920131] [2022-11-20 12:28:35,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:28:35,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:35,192 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:35,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:28:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:28:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:35,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:36,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944920131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:36,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:36,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-20 12:28:36,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201707789] [2022-11-20 12:28:36,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:36,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:28:36,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:28:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:28:36,524 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:28:36,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 877 transitions, 17841 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:36,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:36,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:28:36,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:39,302 INFO L130 PetriNetUnfolder]: 800/3025 cut-off events. [2022-11-20 12:28:39,303 INFO L131 PetriNetUnfolder]: For 54385/54397 co-relation queries the response was YES. [2022-11-20 12:28:39,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20825 conditions, 3025 events. 800/3025 cut-off events. For 54385/54397 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28931 event pairs, 94 based on Foata normal form. 4/3007 useless extension candidates. Maximal degree in co-relation 20706. Up to 1066 conditions per place. [2022-11-20 12:28:39,346 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 390 selfloop transitions, 473 changer transitions 12/917 dead transitions. [2022-11-20 12:28:39,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 917 transitions, 20091 flow [2022-11-20 12:28:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 12:28:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-20 12:28:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1820 transitions. [2022-11-20 12:28:39,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6196799455226422 [2022-11-20 12:28:39,348 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1820 transitions. [2022-11-20 12:28:39,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1820 transitions. [2022-11-20 12:28:39,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:39,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1820 transitions. [2022-11-20 12:28:39,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.15151515151515) internal successors, (1820), 33 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:39,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:39,356 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:39,356 INFO L175 Difference]: Start difference. First operand has 561 places, 877 transitions, 17841 flow. Second operand 33 states and 1820 transitions. [2022-11-20 12:28:39,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 917 transitions, 20091 flow [2022-11-20 12:28:39,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 917 transitions, 19921 flow, removed 23 selfloop flow, removed 20 redundant places. [2022-11-20 12:28:39,733 INFO L231 Difference]: Finished difference. Result has 583 places, 887 transitions, 19235 flow [2022-11-20 12:28:39,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17677, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=19235, PETRI_PLACES=583, PETRI_TRANSITIONS=887} [2022-11-20 12:28:39,735 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 504 predicate places. [2022-11-20 12:28:39,735 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 887 transitions, 19235 flow [2022-11-20 12:28:39,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:39,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:39,736 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:39,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 12:28:39,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:39,941 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash -280113973, now seen corresponding path program 14 times [2022-11-20 12:28:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:39,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601124715] [2022-11-20 12:28:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:39,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:40,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601124715] [2022-11-20 12:28:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601124715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531394756] [2022-11-20 12:28:40,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:28:40,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:40,466 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:40,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:28:40,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:28:40,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:28:40,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:41,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:42,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531394756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:42,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:42,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-20 12:28:42,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543618001] [2022-11-20 12:28:42,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:42,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:28:42,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:42,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:28:42,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:28:42,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:28:42,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 887 transitions, 19235 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:42,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:42,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:28:42,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:50,163 INFO L130 PetriNetUnfolder]: 860/3281 cut-off events. [2022-11-20 12:28:50,163 INFO L131 PetriNetUnfolder]: For 67162/67187 co-relation queries the response was YES. [2022-11-20 12:28:50,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23672 conditions, 3281 events. 860/3281 cut-off events. For 67162/67187 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32095 event pairs, 90 based on Foata normal form. 6/3275 useless extension candidates. Maximal degree in co-relation 23543. Up to 930 conditions per place. [2022-11-20 12:28:50,209 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 290 selfloop transitions, 717 changer transitions 12/1061 dead transitions. [2022-11-20 12:28:50,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 1061 transitions, 24357 flow [2022-11-20 12:28:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 12:28:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-11-20 12:28:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4796 transitions. [2022-11-20 12:28:50,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6193981660854966 [2022-11-20 12:28:50,216 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4796 transitions. [2022-11-20 12:28:50,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4796 transitions. [2022-11-20 12:28:50,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:50,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4796 transitions. [2022-11-20 12:28:50,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 55.12643678160919) internal successors, (4796), 87 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:50,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:50,235 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 89.0) internal successors, (7832), 88 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:50,235 INFO L175 Difference]: Start difference. First operand has 583 places, 887 transitions, 19235 flow. Second operand 87 states and 4796 transitions. [2022-11-20 12:28:50,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 1061 transitions, 24357 flow [2022-11-20 12:28:50,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1061 transitions, 23811 flow, removed 52 selfloop flow, removed 20 redundant places. [2022-11-20 12:28:50,745 INFO L231 Difference]: Finished difference. Result has 663 places, 991 transitions, 23429 flow [2022-11-20 12:28:50,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=18739, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=23429, PETRI_PLACES=663, PETRI_TRANSITIONS=991} [2022-11-20 12:28:50,746 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 584 predicate places. [2022-11-20 12:28:50,747 INFO L495 AbstractCegarLoop]: Abstraction has has 663 places, 991 transitions, 23429 flow [2022-11-20 12:28:50,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:50,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:50,747 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:50,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-20 12:28:50,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:50,949 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:28:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:50,950 INFO L85 PathProgramCache]: Analyzing trace with hash 194159815, now seen corresponding path program 15 times [2022-11-20 12:28:50,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:50,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411673912] [2022-11-20 12:28:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:50,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:51,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:51,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411673912] [2022-11-20 12:28:51,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411673912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:51,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23630292] [2022-11-20 12:28:51,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:28:51,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:51,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:51,495 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:51,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:28:51,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:28:51,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:51,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:28:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:52,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:53,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23630292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:53,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:53,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-20 12:28:53,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606042992] [2022-11-20 12:28:53,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:53,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:28:53,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:53,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:28:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:28:53,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:28:53,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 991 transitions, 23429 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:53,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:53,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:28:53,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:59,504 INFO L130 PetriNetUnfolder]: 1090/3896 cut-off events. [2022-11-20 12:28:59,504 INFO L131 PetriNetUnfolder]: For 102958/102989 co-relation queries the response was YES. [2022-11-20 12:28:59,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30505 conditions, 3896 events. 1090/3896 cut-off events. For 102958/102989 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38667 event pairs, 109 based on Foata normal form. 4/3891 useless extension candidates. Maximal degree in co-relation 30362. Up to 951 conditions per place. [2022-11-20 12:28:59,566 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 414 selfloop transitions, 829 changer transitions 6/1291 dead transitions. [2022-11-20 12:28:59,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1291 transitions, 31552 flow [2022-11-20 12:28:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 12:28:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-20 12:28:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3650 transitions. [2022-11-20 12:28:59,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6309420916162489 [2022-11-20 12:28:59,573 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3650 transitions. [2022-11-20 12:28:59,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3650 transitions. [2022-11-20 12:28:59,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:59,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3650 transitions. [2022-11-20 12:28:59,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 56.15384615384615) internal successors, (3650), 65 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:59,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 89.0) internal successors, (5874), 66 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:59,588 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 89.0) internal successors, (5874), 66 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:59,588 INFO L175 Difference]: Start difference. First operand has 663 places, 991 transitions, 23429 flow. Second operand 65 states and 3650 transitions. [2022-11-20 12:28:59,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1291 transitions, 31552 flow [2022-11-20 12:29:00,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 1291 transitions, 30456 flow, removed 375 selfloop flow, removed 31 redundant places. [2022-11-20 12:29:00,754 INFO L231 Difference]: Finished difference. Result has 703 places, 1196 transitions, 29447 flow [2022-11-20 12:29:00,755 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=22495, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=29447, PETRI_PLACES=703, PETRI_TRANSITIONS=1196} [2022-11-20 12:29:00,756 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 624 predicate places. [2022-11-20 12:29:00,756 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 1196 transitions, 29447 flow [2022-11-20 12:29:00,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:00,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:00,757 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:00,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:00,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 12:29:00,963 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:29:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1355653055, now seen corresponding path program 16 times [2022-11-20 12:29:00,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:00,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707134022] [2022-11-20 12:29:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:00,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:01,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707134022] [2022-11-20 12:29:01,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707134022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:01,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937247206] [2022-11-20 12:29:01,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:29:01,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:01,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:01,518 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:01,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:29:01,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:29:01,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:01,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:29:01,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:02,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:03,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937247206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:03,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:03,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-20 12:29:03,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463221660] [2022-11-20 12:29:03,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:03,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:29:03,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:03,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:29:03,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:29:03,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:29:03,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 1196 transitions, 29447 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:03,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:03,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:29:03,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:13,407 INFO L130 PetriNetUnfolder]: 1130/4033 cut-off events. [2022-11-20 12:29:13,408 INFO L131 PetriNetUnfolder]: For 117345/117393 co-relation queries the response was YES. [2022-11-20 12:29:13,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32920 conditions, 4033 events. 1130/4033 cut-off events. For 117345/117393 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40269 event pairs, 82 based on Foata normal form. 9/4032 useless extension candidates. Maximal degree in co-relation 32773. Up to 1060 conditions per place. [2022-11-20 12:29:13,486 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 362 selfloop transitions, 917 changer transitions 12/1333 dead transitions. [2022-11-20 12:29:13,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 1333 transitions, 34320 flow [2022-11-20 12:29:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-20 12:29:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2022-11-20 12:29:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 5536 transitions. [2022-11-20 12:29:13,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6220224719101124 [2022-11-20 12:29:13,499 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 5536 transitions. [2022-11-20 12:29:13,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 5536 transitions. [2022-11-20 12:29:13,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:13,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 5536 transitions. [2022-11-20 12:29:13,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 55.36) internal successors, (5536), 100 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:13,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 89.0) internal successors, (8989), 101 states have internal predecessors, (8989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:13,529 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 89.0) internal successors, (8989), 101 states have internal predecessors, (8989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:13,530 INFO L175 Difference]: Start difference. First operand has 703 places, 1196 transitions, 29447 flow. Second operand 100 states and 5536 transitions. [2022-11-20 12:29:13,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 1333 transitions, 34320 flow [2022-11-20 12:29:15,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1333 transitions, 33364 flow, removed 248 selfloop flow, removed 26 redundant places. [2022-11-20 12:29:15,122 INFO L231 Difference]: Finished difference. Result has 780 places, 1244 transitions, 32073 flow [2022-11-20 12:29:15,123 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=28600, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=32073, PETRI_PLACES=780, PETRI_TRANSITIONS=1244} [2022-11-20 12:29:15,123 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 701 predicate places. [2022-11-20 12:29:15,123 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 1244 transitions, 32073 flow [2022-11-20 12:29:15,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:15,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:15,124 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:15,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:15,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 12:29:15,325 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:29:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1191976297, now seen corresponding path program 17 times [2022-11-20 12:29:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:15,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089620773] [2022-11-20 12:29:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:15,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:15,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:15,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089620773] [2022-11-20 12:29:15,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089620773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:15,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272984124] [2022-11-20 12:29:15,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:29:15,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:15,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:15,898 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:15,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:29:15,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 12:29:15,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:29:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:16,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:17,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272984124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:17,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:17,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-20 12:29:17,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562955166] [2022-11-20 12:29:17,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:17,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 12:29:17,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:17,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 12:29:17,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 12:29:17,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:29:17,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 1244 transitions, 32073 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:17,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:17,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:29:17,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:28,307 INFO L130 PetriNetUnfolder]: 1382/4801 cut-off events. [2022-11-20 12:29:28,307 INFO L131 PetriNetUnfolder]: For 173835/173858 co-relation queries the response was YES. [2022-11-20 12:29:28,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42496 conditions, 4801 events. 1382/4801 cut-off events. For 173835/173858 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 48637 event pairs, 71 based on Foata normal form. 29/4812 useless extension candidates. Maximal degree in co-relation 42343. Up to 687 conditions per place. [2022-11-20 12:29:28,405 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 583 selfloop transitions, 1005 changer transitions 19/1649 dead transitions. [2022-11-20 12:29:28,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 1649 transitions, 45609 flow [2022-11-20 12:29:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-20 12:29:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-11-20 12:29:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 5293 transitions. [2022-11-20 12:29:28,414 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6326798948123357 [2022-11-20 12:29:28,415 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 5293 transitions. [2022-11-20 12:29:28,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 5293 transitions. [2022-11-20 12:29:28,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:28,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 5293 transitions. [2022-11-20 12:29:28,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 56.308510638297875) internal successors, (5293), 94 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:28,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:28,443 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 89.0) internal successors, (8455), 95 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:28,444 INFO L175 Difference]: Start difference. First operand has 780 places, 1244 transitions, 32073 flow. Second operand 94 states and 5293 transitions. [2022-11-20 12:29:28,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 1649 transitions, 45609 flow [2022-11-20 12:29:30,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 1649 transitions, 44503 flow, removed 208 selfloop flow, removed 54 redundant places. [2022-11-20 12:29:30,328 INFO L231 Difference]: Finished difference. Result has 846 places, 1455 transitions, 40746 flow [2022-11-20 12:29:30,330 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=31231, PETRI_DIFFERENCE_MINUEND_PLACES=717, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=817, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=40746, PETRI_PLACES=846, PETRI_TRANSITIONS=1455} [2022-11-20 12:29:30,331 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 767 predicate places. [2022-11-20 12:29:30,331 INFO L495 AbstractCegarLoop]: Abstraction has has 846 places, 1455 transitions, 40746 flow [2022-11-20 12:29:30,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:30,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:30,332 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:30,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-20 12:29:30,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 12:29:30,538 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:29:30,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1756563129, now seen corresponding path program 18 times [2022-11-20 12:29:30,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:30,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973760105] [2022-11-20 12:29:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:30,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:31,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:31,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973760105] [2022-11-20 12:29:31,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973760105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:31,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996205741] [2022-11-20 12:29:31,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:29:31,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:31,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:31,212 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:31,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:29:31,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 12:29:31,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:31,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:29:31,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:32,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:33,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996205741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:33,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:33,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-11-20 12:29:33,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138654595] [2022-11-20 12:29:33,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:33,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 12:29:33,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:33,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 12:29:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 12:29:33,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:29:33,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 846 places, 1455 transitions, 40746 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:33,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:33,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:29:33,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:48,375 INFO L130 PetriNetUnfolder]: 1658/5703 cut-off events. [2022-11-20 12:29:48,376 INFO L131 PetriNetUnfolder]: For 315524/315539 co-relation queries the response was YES. [2022-11-20 12:29:48,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57546 conditions, 5703 events. 1658/5703 cut-off events. For 315524/315539 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 59417 event pairs, 87 based on Foata normal form. 12/5695 useless extension candidates. Maximal degree in co-relation 57364. Up to 832 conditions per place. [2022-11-20 12:29:48,492 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 530 selfloop transitions, 1367 changer transitions 12/1951 dead transitions. [2022-11-20 12:29:48,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 1951 transitions, 59308 flow [2022-11-20 12:29:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-11-20 12:29:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2022-11-20 12:29:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 7781 transitions. [2022-11-20 12:29:48,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.624478330658106 [2022-11-20 12:29:48,499 INFO L72 ComplementDD]: Start complementDD. Operand 140 states and 7781 transitions. [2022-11-20 12:29:48,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 7781 transitions. [2022-11-20 12:29:48,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:48,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 140 states and 7781 transitions. [2022-11-20 12:29:48,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 141 states, 140 states have (on average 55.57857142857143) internal successors, (7781), 140 states have internal predecessors, (7781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:48,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:48,528 INFO L81 ComplementDD]: Finished complementDD. Result has 141 states, 141 states have (on average 89.0) internal successors, (12549), 141 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:48,528 INFO L175 Difference]: Start difference. First operand has 846 places, 1455 transitions, 40746 flow. Second operand 140 states and 7781 transitions. [2022-11-20 12:29:48,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 1951 transitions, 59308 flow [2022-11-20 12:29:51,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 932 places, 1951 transitions, 57201 flow, removed 604 selfloop flow, removed 46 redundant places. [2022-11-20 12:29:51,711 INFO L231 Difference]: Finished difference. Result has 960 places, 1762 transitions, 52497 flow [2022-11-20 12:29:51,712 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=38987, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=140, PETRI_FLOW=52497, PETRI_PLACES=960, PETRI_TRANSITIONS=1762} [2022-11-20 12:29:51,713 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 881 predicate places. [2022-11-20 12:29:51,713 INFO L495 AbstractCegarLoop]: Abstraction has has 960 places, 1762 transitions, 52497 flow [2022-11-20 12:29:51,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:51,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:51,714 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:51,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:51,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 12:29:51,920 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:29:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1450801589, now seen corresponding path program 19 times [2022-11-20 12:29:51,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:51,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426920421] [2022-11-20 12:29:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:52,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:52,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426920421] [2022-11-20 12:29:52,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426920421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:52,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556219514] [2022-11-20 12:29:52,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:29:52,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:52,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:52,558 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:52,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:29:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:52,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:29:52,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:53,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:54,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556219514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:54,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:54,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-20 12:29:54,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373850605] [2022-11-20 12:29:54,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:54,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 12:29:54,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:54,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 12:29:54,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 12:29:54,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:29:54,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 1762 transitions, 52497 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:54,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:54,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:29:54,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:30:26,070 INFO L130 PetriNetUnfolder]: 1852/6369 cut-off events. [2022-11-20 12:30:26,070 INFO L131 PetriNetUnfolder]: For 393240/393263 co-relation queries the response was YES. [2022-11-20 12:30:26,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66310 conditions, 6369 events. 1852/6369 cut-off events. For 393240/393263 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 67654 event pairs, 73 based on Foata normal form. 14/6368 useless extension candidates. Maximal degree in co-relation 66115. Up to 930 conditions per place. [2022-11-20 12:30:26,205 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 498 selfloop transitions, 1728 changer transitions 13/2281 dead transitions. [2022-11-20 12:30:26,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1195 places, 2281 transitions, 70137 flow [2022-11-20 12:30:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-20 12:30:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2022-11-20 12:30:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 13425 transitions. [2022-11-20 12:30:26,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6233169282198904 [2022-11-20 12:30:26,219 INFO L72 ComplementDD]: Start complementDD. Operand 242 states and 13425 transitions. [2022-11-20 12:30:26,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 242 states and 13425 transitions. [2022-11-20 12:30:26,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:30:26,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 242 states and 13425 transitions. [2022-11-20 12:30:26,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 243 states, 242 states have (on average 55.47520661157025) internal successors, (13425), 242 states have internal predecessors, (13425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:26,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 243 states, 243 states have (on average 89.0) internal successors, (21627), 243 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:26,259 INFO L81 ComplementDD]: Finished complementDD. Result has 243 states, 243 states have (on average 89.0) internal successors, (21627), 243 states have internal predecessors, (21627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:26,260 INFO L175 Difference]: Start difference. First operand has 960 places, 1762 transitions, 52497 flow. Second operand 242 states and 13425 transitions. [2022-11-20 12:30:26,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1195 places, 2281 transitions, 70137 flow [2022-11-20 12:30:29,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1166 places, 2281 transitions, 68446 flow, removed 731 selfloop flow, removed 29 redundant places. [2022-11-20 12:30:29,892 INFO L231 Difference]: Finished difference. Result has 1202 places, 2017 transitions, 63477 flow [2022-11-20 12:30:29,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=51191, PETRI_DIFFERENCE_MINUEND_PLACES=925, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=242, PETRI_FLOW=63477, PETRI_PLACES=1202, PETRI_TRANSITIONS=2017} [2022-11-20 12:30:29,894 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1123 predicate places. [2022-11-20 12:30:29,894 INFO L495 AbstractCegarLoop]: Abstraction has has 1202 places, 2017 transitions, 63477 flow [2022-11-20 12:30:29,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:29,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:30:29,895 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:30:29,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-20 12:30:30,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 12:30:30,102 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:30:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:30,102 INFO L85 PathProgramCache]: Analyzing trace with hash -577478975, now seen corresponding path program 1 times [2022-11-20 12:30:30,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:30:30,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914813758] [2022-11-20 12:30:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:30,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:30:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:30,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:30:30,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914813758] [2022-11-20 12:30:30,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914813758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:30:30,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453177662] [2022-11-20 12:30:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:30,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:30:30,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:30:30,562 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:30:30,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 12:30:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 12:30:30,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:31,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:31,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453177662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:31,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:30:31,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-11-20 12:30:31,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490953775] [2022-11-20 12:30:31,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:31,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 12:30:31,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:30:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 12:30:31,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:30:31,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-20 12:30:31,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1202 places, 2017 transitions, 63477 flow. Second operand has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:31,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:30:31,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-20 12:30:31,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:30:41,431 INFO L130 PetriNetUnfolder]: 2069/6726 cut-off events. [2022-11-20 12:30:41,431 INFO L131 PetriNetUnfolder]: For 486783/486798 co-relation queries the response was YES. [2022-11-20 12:30:41,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73868 conditions, 6726 events. 2069/6726 cut-off events. For 486783/486798 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70576 event pairs, 295 based on Foata normal form. 12/6707 useless extension candidates. Maximal degree in co-relation 73647. Up to 1859 conditions per place. [2022-11-20 12:30:41,647 INFO L137 encePairwiseOnDemand]: 71/89 looper letters, 871 selfloop transitions, 1181 changer transitions 27/2120 dead transitions. [2022-11-20 12:30:41,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 2120 transitions, 69637 flow [2022-11-20 12:30:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 12:30:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-20 12:30:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3004 transitions. [2022-11-20 12:30:41,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6250520183104453 [2022-11-20 12:30:41,651 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3004 transitions. [2022-11-20 12:30:41,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3004 transitions. [2022-11-20 12:30:41,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:30:41,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3004 transitions. [2022-11-20 12:30:41,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.629629629629626) internal successors, (3004), 54 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:41,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:41,795 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:41,795 INFO L175 Difference]: Start difference. First operand has 1202 places, 2017 transitions, 63477 flow. Second operand 54 states and 3004 transitions. [2022-11-20 12:30:41,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1249 places, 2120 transitions, 69637 flow [2022-11-20 12:30:47,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1138 places, 2120 transitions, 67170 flow, removed 612 selfloop flow, removed 111 redundant places. [2022-11-20 12:30:47,629 INFO L231 Difference]: Finished difference. Result has 1152 places, 2018 transitions, 63566 flow [2022-11-20 12:30:47,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=61046, PETRI_DIFFERENCE_MINUEND_PLACES=1085, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=63566, PETRI_PLACES=1152, PETRI_TRANSITIONS=2018} [2022-11-20 12:30:47,631 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1073 predicate places. [2022-11-20 12:30:47,631 INFO L495 AbstractCegarLoop]: Abstraction has has 1152 places, 2018 transitions, 63566 flow [2022-11-20 12:30:47,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.62162162162162) internal successors, (1947), 37 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:47,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:30:47,632 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:30:47,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 12:30:47,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 12:30:47,838 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:30:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:47,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1832449457, now seen corresponding path program 20 times [2022-11-20 12:30:47,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:30:47,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993965397] [2022-11-20 12:30:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:47,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:30:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:48,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:30:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993965397] [2022-11-20 12:30:48,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993965397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:30:48,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209253081] [2022-11-20 12:30:48,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:30:48,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:30:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:30:48,360 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:30:48,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 12:30:48,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:30:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:30:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:30:48,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:49,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:50,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209253081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:50,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:30:50,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-20 12:30:50,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253083710] [2022-11-20 12:30:50,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:50,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 12:30:50,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:30:50,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 12:30:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 12:30:50,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:30:50,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1152 places, 2018 transitions, 63566 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:50,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:30:50,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:30:50,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:31:04,881 INFO L130 PetriNetUnfolder]: 1893/6407 cut-off events. [2022-11-20 12:31:04,881 INFO L131 PetriNetUnfolder]: For 512729/512744 co-relation queries the response was YES. [2022-11-20 12:31:05,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74092 conditions, 6407 events. 1893/6407 cut-off events. For 512729/512744 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67633 event pairs, 113 based on Foata normal form. 12/6391 useless extension candidates. Maximal degree in co-relation 73873. Up to 1086 conditions per place. [2022-11-20 12:31:05,071 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 660 selfloop transitions, 1480 changer transitions 12/2195 dead transitions. [2022-11-20 12:31:05,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1241 places, 2195 transitions, 73529 flow [2022-11-20 12:31:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-20 12:31:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-11-20 12:31:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2022-11-20 12:31:05,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2022-11-20 12:31:05,075 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2022-11-20 12:31:05,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2022-11-20 12:31:05,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:31:05,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2022-11-20 12:31:05,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:05,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:05,094 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:05,094 INFO L175 Difference]: Start difference. First operand has 1152 places, 2018 transitions, 63566 flow. Second operand 107 states and 5929 transitions. [2022-11-20 12:31:05,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1241 places, 2195 transitions, 73529 flow [2022-11-20 12:31:10,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1215 places, 2195 transitions, 72738 flow, removed 87 selfloop flow, removed 26 redundant places. [2022-11-20 12:31:10,093 INFO L231 Difference]: Finished difference. Result has 1229 places, 2090 transitions, 69440 flow [2022-11-20 12:31:10,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=62902, PETRI_DIFFERENCE_MINUEND_PLACES=1109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=69440, PETRI_PLACES=1229, PETRI_TRANSITIONS=2090} [2022-11-20 12:31:10,095 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1150 predicate places. [2022-11-20 12:31:10,095 INFO L495 AbstractCegarLoop]: Abstraction has has 1229 places, 2090 transitions, 69440 flow [2022-11-20 12:31:10,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:10,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:31:10,096 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:31:10,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-20 12:31:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 12:31:10,303 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:31:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:31:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1209061875, now seen corresponding path program 21 times [2022-11-20 12:31:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:31:10,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425315184] [2022-11-20 12:31:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:31:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:31:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:31:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:10,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:31:10,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425315184] [2022-11-20 12:31:10,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425315184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:31:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938990999] [2022-11-20 12:31:10,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:31:10,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:31:10,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:31:10,932 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:31:10,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 12:31:11,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 12:31:11,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:31:11,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:31:11,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:31:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:11,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:31:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:13,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938990999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:31:13,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:31:13,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-20 12:31:13,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123462466] [2022-11-20 12:31:13,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:31:13,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 12:31:13,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:31:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 12:31:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 12:31:13,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:31:13,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1229 places, 2090 transitions, 69440 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:13,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:31:13,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:31:13,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:31:36,971 INFO L130 PetriNetUnfolder]: 2274/7565 cut-off events. [2022-11-20 12:31:36,972 INFO L131 PetriNetUnfolder]: For 663924/663947 co-relation queries the response was YES. [2022-11-20 12:31:37,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92849 conditions, 7565 events. 2274/7565 cut-off events. For 663924/663947 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 81799 event pairs, 97 based on Foata normal form. 14/7570 useless extension candidates. Maximal degree in co-relation 92625. Up to 1128 conditions per place. [2022-11-20 12:31:37,235 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 647 selfloop transitions, 2012 changer transitions 12/2714 dead transitions. [2022-11-20 12:31:37,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1388 places, 2714 transitions, 96896 flow [2022-11-20 12:31:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-20 12:31:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2022-11-20 12:31:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 9368 transitions. [2022-11-20 12:31:37,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6265382557517389 [2022-11-20 12:31:37,244 INFO L72 ComplementDD]: Start complementDD. Operand 168 states and 9368 transitions. [2022-11-20 12:31:37,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 168 states and 9368 transitions. [2022-11-20 12:31:37,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:31:37,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 168 states and 9368 transitions. [2022-11-20 12:31:37,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 169 states, 168 states have (on average 55.76190476190476) internal successors, (9368), 168 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:37,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:37,276 INFO L81 ComplementDD]: Finished complementDD. Result has 169 states, 169 states have (on average 89.0) internal successors, (15041), 169 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:37,277 INFO L175 Difference]: Start difference. First operand has 1229 places, 2090 transitions, 69440 flow. Second operand 168 states and 9368 transitions. [2022-11-20 12:31:37,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1388 places, 2714 transitions, 96896 flow [2022-11-20 12:31:44,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1329 places, 2714 transitions, 95311 flow, removed 143 selfloop flow, removed 59 redundant places. [2022-11-20 12:31:44,615 INFO L231 Difference]: Finished difference. Result has 1361 places, 2482 transitions, 88942 flow [2022-11-20 12:31:44,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=68207, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=168, PETRI_FLOW=88942, PETRI_PLACES=1361, PETRI_TRANSITIONS=2482} [2022-11-20 12:31:44,618 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1282 predicate places. [2022-11-20 12:31:44,619 INFO L495 AbstractCegarLoop]: Abstraction has has 1361 places, 2482 transitions, 88942 flow [2022-11-20 12:31:44,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:44,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:31:44,620 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:31:44,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 12:31:44,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 12:31:44,826 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:31:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:31:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2008610497, now seen corresponding path program 2 times [2022-11-20 12:31:44,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:31:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165281595] [2022-11-20 12:31:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:31:44,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:31:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:31:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:45,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:31:45,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165281595] [2022-11-20 12:31:45,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165281595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:31:45,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743644457] [2022-11-20 12:31:45,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:31:45,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:31:45,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:31:45,303 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:31:45,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 12:31:45,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:31:45,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:31:45,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 12:31:45,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:31:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:45,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:31:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:46,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743644457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:31:46,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:31:46,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2022-11-20 12:31:46,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571009821] [2022-11-20 12:31:46,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:31:46,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 12:31:46,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:31:46,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 12:31:46,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 12:31:46,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2022-11-20 12:31:46,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1361 places, 2482 transitions, 88942 flow. Second operand has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:46,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:31:46,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2022-11-20 12:31:46,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:32:03,125 INFO L130 PetriNetUnfolder]: 2627/8394 cut-off events. [2022-11-20 12:32:03,126 INFO L131 PetriNetUnfolder]: For 815343/815366 co-relation queries the response was YES. [2022-11-20 12:32:03,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106566 conditions, 8394 events. 2627/8394 cut-off events. For 815343/815366 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 91151 event pairs, 418 based on Foata normal form. 17/8374 useless extension candidates. Maximal degree in co-relation 106317. Up to 2548 conditions per place. [2022-11-20 12:32:03,491 INFO L137 encePairwiseOnDemand]: 70/89 looper letters, 984 selfloop transitions, 1640 changer transitions 32/2697 dead transitions. [2022-11-20 12:32:03,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1436 places, 2697 transitions, 101161 flow [2022-11-20 12:32:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-20 12:32:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-11-20 12:32:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4518 transitions. [2022-11-20 12:32:03,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.619073718827076 [2022-11-20 12:32:03,494 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4518 transitions. [2022-11-20 12:32:03,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4518 transitions. [2022-11-20 12:32:03,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:32:03,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4518 transitions. [2022-11-20 12:32:03,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 55.09756097560975) internal successors, (4518), 82 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:03,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:03,509 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 89.0) internal successors, (7387), 83 states have internal predecessors, (7387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:03,510 INFO L175 Difference]: Start difference. First operand has 1361 places, 2482 transitions, 88942 flow. Second operand 82 states and 4518 transitions. [2022-11-20 12:32:03,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1436 places, 2697 transitions, 101161 flow [2022-11-20 12:32:13,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1386 places, 2697 transitions, 98447 flow, removed 614 selfloop flow, removed 50 redundant places. [2022-11-20 12:32:13,547 INFO L231 Difference]: Finished difference. Result has 1405 places, 2570 transitions, 93940 flow [2022-11-20 12:32:13,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=86362, PETRI_DIFFERENCE_MINUEND_PLACES=1305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=93940, PETRI_PLACES=1405, PETRI_TRANSITIONS=2570} [2022-11-20 12:32:13,549 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1326 predicate places. [2022-11-20 12:32:13,550 INFO L495 AbstractCegarLoop]: Abstraction has has 1405 places, 2570 transitions, 93940 flow [2022-11-20 12:32:13,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.63157894736842) internal successors, (2000), 38 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:13,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:32:13,551 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:32:13,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 12:32:13,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:32:13,764 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:32:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:32:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1087887845, now seen corresponding path program 22 times [2022-11-20 12:32:13,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:32:13,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463378165] [2022-11-20 12:32:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:32:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:32:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:32:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:32:14,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:32:14,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463378165] [2022-11-20 12:32:14,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463378165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:32:14,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900144371] [2022-11-20 12:32:14,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:32:14,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:32:14,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:32:14,356 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:32:14,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 12:32:14,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:32:14,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:32:14,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:32:14,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:32:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:32:15,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:32:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:32:16,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900144371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:32:16,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:32:16,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2022-11-20 12:32:16,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363102818] [2022-11-20 12:32:16,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:32:16,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 12:32:16,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:32:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 12:32:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 12:32:16,113 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:32:16,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1405 places, 2570 transitions, 93940 flow. Second operand has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:16,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:32:16,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:32:16,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:32:46,343 INFO L130 PetriNetUnfolder]: 2414/8071 cut-off events. [2022-11-20 12:32:46,344 INFO L131 PetriNetUnfolder]: For 843819/843842 co-relation queries the response was YES. [2022-11-20 12:32:46,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107220 conditions, 8071 events. 2414/8071 cut-off events. For 843819/843842 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 88489 event pairs, 62 based on Foata normal form. 14/8076 useless extension candidates. Maximal degree in co-relation 106960. Up to 1151 conditions per place. [2022-11-20 12:32:46,757 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 529 selfloop transitions, 2344 changer transitions 12/2929 dead transitions. [2022-11-20 12:32:46,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1605 places, 2929 transitions, 111641 flow [2022-11-20 12:32:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-11-20 12:32:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2022-11-20 12:32:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 12002 transitions. [2022-11-20 12:32:46,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6243237619642114 [2022-11-20 12:32:46,767 INFO L72 ComplementDD]: Start complementDD. Operand 216 states and 12002 transitions. [2022-11-20 12:32:46,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 216 states and 12002 transitions. [2022-11-20 12:32:46,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:32:46,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 216 states and 12002 transitions. [2022-11-20 12:32:46,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 217 states, 216 states have (on average 55.56481481481482) internal successors, (12002), 216 states have internal predecessors, (12002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:46,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 217 states, 217 states have (on average 89.0) internal successors, (19313), 217 states have internal predecessors, (19313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:46,974 INFO L81 ComplementDD]: Finished complementDD. Result has 217 states, 217 states have (on average 89.0) internal successors, (19313), 217 states have internal predecessors, (19313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:46,974 INFO L175 Difference]: Start difference. First operand has 1405 places, 2570 transitions, 93940 flow. Second operand 216 states and 12002 transitions. [2022-11-20 12:32:46,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1605 places, 2929 transitions, 111641 flow [2022-11-20 12:32:56,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1554 places, 2929 transitions, 108735 flow, removed 277 selfloop flow, removed 51 redundant places. [2022-11-20 12:32:56,943 INFO L231 Difference]: Finished difference. Result has 1577 places, 2694 transitions, 102019 flow [2022-11-20 12:32:56,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=91538, PETRI_DIFFERENCE_MINUEND_PLACES=1339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=216, PETRI_FLOW=102019, PETRI_PLACES=1577, PETRI_TRANSITIONS=2694} [2022-11-20 12:32:56,944 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, 1498 predicate places. [2022-11-20 12:32:56,945 INFO L495 AbstractCegarLoop]: Abstraction has has 1577 places, 2694 transitions, 102019 flow [2022-11-20 12:32:56,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 53.62222222222222) internal successors, (2413), 45 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:56,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:32:56,945 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:32:56,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-20 12:32:57,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:32:57,146 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:32:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:32:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1395740355, now seen corresponding path program 23 times [2022-11-20 12:32:57,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:32:57,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251300086] [2022-11-20 12:32:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:32:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:32:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:32:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:32:57,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:32:57,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251300086] [2022-11-20 12:32:57,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251300086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:32:57,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233920720] [2022-11-20 12:32:57,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:32:57,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:32:57,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:32:57,564 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:32:57,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3360f99b-e492-4243-913b-437fffbfa33a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 12:32:57,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 12:32:57,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:32:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 12:32:57,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:32:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:32:58,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:32:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:32:59,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233920720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:32:59,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:32:59,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-20 12:32:59,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634325206] [2022-11-20 12:32:59,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:32:59,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 12:32:59,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:32:59,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 12:32:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 12:32:59,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-20 12:32:59,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1577 places, 2694 transitions, 102019 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:59,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:32:59,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-20 12:32:59,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand