./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS --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 c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 --- 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-4e7fbc6 [2022-11-23 02:33:44,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:33:44,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:33:44,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:33:44,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:33:44,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:33:44,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:33:44,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:33:44,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:33:44,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:33:44,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:33:44,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:33:44,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:33:44,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:33:44,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:33:44,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:33:44,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:33:44,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:33:44,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:33:45,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:33:45,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:33:45,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:33:45,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:33:45,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:33:45,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:33:45,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:33:45,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:33:45,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:33:45,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:33:45,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:33:45,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:33:45,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:33:45,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:33:45,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:33:45,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:33:45,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:33:45,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:33:45,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:33:45,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:33:45,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:33:45,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:33:45,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:33:45,086 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:33:45,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:33:45,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:33:45,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:33:45,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:33:45,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:33:45,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:33:45,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:33:45,100 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:33:45,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:33:45,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:33:45,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:33:45,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:33:45,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:33:45,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:33:45,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:33:45,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:33:45,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:33:45,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:33:45,104 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:33:45,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:33:45,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:33:45,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:33:45,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:33:45,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:33:45,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:33:45,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:33:45,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:33:45,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:33:45,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:33:45,107 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:33:45,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:33:45,108 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:33:45,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:33:45,109 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2022-11-23 02:33:45,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:33:45,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:33:45,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:33:45,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:33:45,453 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:33:45,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-11-23 02:33:48,507 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:33:48,770 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:33:48,771 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-11-23 02:33:48,778 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/data/b9f535eee/fa5774390fc1451bbbd62138ad453231/FLAG7d1e21bf9 [2022-11-23 02:33:48,793 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/data/b9f535eee/fa5774390fc1451bbbd62138ad453231 [2022-11-23 02:33:48,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:33:48,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:33:48,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:33:48,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:33:48,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:33:48,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:48" (1/1) ... [2022-11-23 02:33:48,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78111c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:48, skipping insertion in model container [2022-11-23 02:33:48,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:48" (1/1) ... [2022-11-23 02:33:48,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:33:48,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:33:49,005 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_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-11-23 02:33:49,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:33:49,020 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:33:49,042 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_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-11-23 02:33:49,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:33:49,058 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:33:49,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49 WrapperNode [2022-11-23 02:33:49,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:33:49,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:33:49,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:33:49,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:33:49,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,099 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-23 02:33:49,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:33:49,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:33:49,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:33:49,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:33:49,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,127 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:33:49,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:33:49,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:33:49,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:33:49,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (1/1) ... [2022-11-23 02:33:49,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:33:49,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:49,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:33:49,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:33:49,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:33:49,216 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:33:49,216 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:33:49,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:33:49,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:33:49,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 02:33:49,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 02:33:49,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:33:49,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:33:49,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:33:49,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:33:49,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:33:49,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:33:49,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:33:49,220 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:33:49,365 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:33:49,367 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:33:49,642 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:33:49,653 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:33:49,653 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 02:33:49,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:49 BoogieIcfgContainer [2022-11-23 02:33:49,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:33:49,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:33:49,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:33:49,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:33:49,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:33:48" (1/3) ... [2022-11-23 02:33:49,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28eeff21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:49, skipping insertion in model container [2022-11-23 02:33:49,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:49" (2/3) ... [2022-11-23 02:33:49,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28eeff21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:49, skipping insertion in model container [2022-11-23 02:33:49,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:49" (3/3) ... [2022-11-23 02:33:49,666 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-11-23 02:33:49,675 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 02:33:49,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:33:49,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:33:49,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:33:49,766 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 02:33:49,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2022-11-23 02:33:49,893 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2022-11-23 02:33:49,895 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:33:49,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2022-11-23 02:33:49,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 238 flow [2022-11-23 02:33:49,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 93 transitions, 204 flow [2022-11-23 02:33:49,916 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:33:49,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 93 transitions, 204 flow [2022-11-23 02:33:49,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 93 transitions, 204 flow [2022-11-23 02:33:49,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 93 transitions, 204 flow [2022-11-23 02:33:50,022 INFO L130 PetriNetUnfolder]: 7/93 cut-off events. [2022-11-23 02:33:50,023 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:33:50,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 7/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2022-11-23 02:33:50,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2022-11-23 02:33:53,475 INFO L134 LiptonReduction]: Checked pairs total: 1314 [2022-11-23 02:33:53,476 INFO L136 LiptonReduction]: Total number of compositions: 79 [2022-11-23 02:33:53,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:33:53,500 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;@34e1f8e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:33:53,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 02:33:53,508 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2022-11-23 02:33:53,508 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:33:53,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:33:53,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:53,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:33:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1956450245, now seen corresponding path program 1 times [2022-11-23 02:33:53,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:53,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616024653] [2022-11-23 02:33:53,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:53,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:54,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:54,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616024653] [2022-11-23 02:33:54,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616024653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:54,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:54,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:33:54,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339654786] [2022-11-23 02:33:54,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:54,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:33:54,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:54,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:33:54,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:33:54,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 186 [2022-11-23 02:33:54,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:54,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:33:54,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 186 [2022-11-23 02:33:54,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:33:54,528 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2022-11-23 02:33:54,529 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-23 02:33:54,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1606 event pairs, 39 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-11-23 02:33:54,544 INFO L137 encePairwiseOnDemand]: 181/186 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2022-11-23 02:33:54,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2022-11-23 02:33:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:33:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:33:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2022-11-23 02:33:54,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2022-11-23 02:33:54,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2022-11-23 02:33:54,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2022-11-23 02:33:54,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:33:54,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2022-11-23 02:33:54,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:54,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:54,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:54,600 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 315 transitions. [2022-11-23 02:33:54,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2022-11-23 02:33:54,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-23 02:33:54,609 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2022-11-23 02:33:54,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2022-11-23 02:33:54,617 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2022-11-23 02:33:54,617 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2022-11-23 02:33:54,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:54,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:33:54,618 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] [2022-11-23 02:33:54,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:33:54,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:33:54,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2005536576, now seen corresponding path program 1 times [2022-11-23 02:33:54,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:54,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395755533] [2022-11-23 02:33:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:54,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:55,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:55,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395755533] [2022-11-23 02:33:55,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395755533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:55,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:55,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:33:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393645206] [2022-11-23 02:33:55,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:55,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:33:55,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:33:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:33:55,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 186 [2022-11-23 02:33:55,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:55,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:33:55,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 186 [2022-11-23 02:33:55,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:33:55,572 INFO L130 PetriNetUnfolder]: 596/906 cut-off events. [2022-11-23 02:33:55,572 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2022-11-23 02:33:55,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 906 events. 596/906 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3370 event pairs, 166 based on Foata normal form. 6/912 useless extension candidates. Maximal degree in co-relation 627. Up to 420 conditions per place. [2022-11-23 02:33:55,578 INFO L137 encePairwiseOnDemand]: 178/186 looper letters, 69 selfloop transitions, 8 changer transitions 8/85 dead transitions. [2022-11-23 02:33:55,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 85 transitions, 416 flow [2022-11-23 02:33:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:33:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:33:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2022-11-23 02:33:55,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.500768049155146 [2022-11-23 02:33:55,582 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2022-11-23 02:33:55,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2022-11-23 02:33:55,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:33:55,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2022-11-23 02:33:55,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:55,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:55,590 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:55,590 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 7 states and 652 transitions. [2022-11-23 02:33:55,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 85 transitions, 416 flow [2022-11-23 02:33:55,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 85 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:33:55,593 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 139 flow [2022-11-23 02:33:55,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-11-23 02:33:55,594 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2022-11-23 02:33:55,594 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 139 flow [2022-11-23 02:33:55,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:55,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:33:55,595 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] [2022-11-23 02:33:55,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 02:33:55,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:33:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash -956107130, now seen corresponding path program 2 times [2022-11-23 02:33:55,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:55,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053747048] [2022-11-23 02:33:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:55,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:55,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053747048] [2022-11-23 02:33:55,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053747048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712592195] [2022-11-23 02:33:55,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:33:55,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:55,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:55,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:33:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:33:56,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:33:56,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:56,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:33:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:56,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:56,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712592195] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:56,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:33:56,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2022-11-23 02:33:56,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966952443] [2022-11-23 02:33:56,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:56,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:33:56,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:56,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:33:56,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:33:56,730 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-23 02:33:56,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:56,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:33:56,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-23 02:33:56,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:33:57,248 INFO L130 PetriNetUnfolder]: 832/1268 cut-off events. [2022-11-23 02:33:57,248 INFO L131 PetriNetUnfolder]: For 1525/1579 co-relation queries the response was YES. [2022-11-23 02:33:57,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4023 conditions, 1268 events. 832/1268 cut-off events. For 1525/1579 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5330 event pairs, 172 based on Foata normal form. 6/1270 useless extension candidates. Maximal degree in co-relation 1710. Up to 409 conditions per place. [2022-11-23 02:33:57,278 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 99 selfloop transitions, 17 changer transitions 1/118 dead transitions. [2022-11-23 02:33:57,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 118 transitions, 705 flow [2022-11-23 02:33:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 02:33:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 02:33:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2022-11-23 02:33:57,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5221774193548387 [2022-11-23 02:33:57,282 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2022-11-23 02:33:57,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2022-11-23 02:33:57,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:33:57,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2022-11-23 02:33:57,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:57,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:57,291 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:57,291 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 139 flow. Second operand 8 states and 777 transitions. [2022-11-23 02:33:57,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 118 transitions, 705 flow [2022-11-23 02:33:57,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 118 transitions, 675 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-23 02:33:57,302 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 294 flow [2022-11-23 02:33:57,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2022-11-23 02:33:57,303 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2022-11-23 02:33:57,304 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 294 flow [2022-11-23 02:33:57,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:57,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:33:57,304 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] [2022-11-23 02:33:57,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:57,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:57,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:33:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2040322026, now seen corresponding path program 1 times [2022-11-23 02:33:57,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:57,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102397761] [2022-11-23 02:33:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:57,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:57,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:57,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102397761] [2022-11-23 02:33:57,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102397761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:57,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:57,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:33:57,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378148490] [2022-11-23 02:33:57,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:57,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:33:57,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:33:57,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:33:57,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:33:57,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2022-11-23 02:33:57,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:57,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:33:57,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2022-11-23 02:33:57,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:33:58,461 INFO L130 PetriNetUnfolder]: 1078/1660 cut-off events. [2022-11-23 02:33:58,461 INFO L131 PetriNetUnfolder]: For 4626/4626 co-relation queries the response was YES. [2022-11-23 02:33:58,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6335 conditions, 1660 events. 1078/1660 cut-off events. For 4626/4626 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7320 event pairs, 336 based on Foata normal form. 10/1670 useless extension candidates. Maximal degree in co-relation 4790. Up to 894 conditions per place. [2022-11-23 02:33:58,476 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 99 selfloop transitions, 13 changer transitions 13/125 dead transitions. [2022-11-23 02:33:58,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 125 transitions, 940 flow [2022-11-23 02:33:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:33:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:33:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2022-11-23 02:33:58,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.500768049155146 [2022-11-23 02:33:58,479 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2022-11-23 02:33:58,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2022-11-23 02:33:58,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:33:58,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2022-11-23 02:33:58,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:58,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:58,488 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:58,488 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 294 flow. Second operand 7 states and 652 transitions. [2022-11-23 02:33:58,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 125 transitions, 940 flow [2022-11-23 02:33:58,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 125 transitions, 936 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-23 02:33:58,511 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 426 flow [2022-11-23 02:33:58,511 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2022-11-23 02:33:58,513 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2022-11-23 02:33:58,513 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 426 flow [2022-11-23 02:33:58,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:33:58,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:33:58,514 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] [2022-11-23 02:33:58,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 02:33:58,515 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:33:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash -591048364, now seen corresponding path program 3 times [2022-11-23 02:33:58,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:33:58,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125987717] [2022-11-23 02:33:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:58,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:33:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:58,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:33:58,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125987717] [2022-11-23 02:33:58,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125987717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:58,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527802316] [2022-11-23 02:33:58,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:33:58,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:33:58,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:58,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:33:58,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:33:58,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:33:58,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:58,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:33:58,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:59,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:34:05,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527802316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:34:05,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:34:05,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-11-23 02:34:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411235968] [2022-11-23 02:34:05,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:05,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:34:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:34:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:34:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=169, Unknown=3, NotChecked=0, Total=240 [2022-11-23 02:34:08,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:08,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 186 [2022-11-23 02:34:08,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 426 flow. Second operand has 16 states, 16 states have (on average 81.125) internal successors, (1298), 16 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:34:08,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:34:08,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 186 [2022-11-23 02:34:08,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:34:33,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:35,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:37,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:39,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:41,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:43,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:45,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:47,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:49,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:52,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:54,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:56,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:34:58,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:35:03,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:35:05,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:35:30,151 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (.cse2 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (let ((.cse1 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse1 .cse2) 4294967296) 4294967296) .cse3) .cse1)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (or (< .cse4 (mod c_~a~0 4294967296)) (let ((.cse5 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse5 .cse2) 4294967296) 4294967296) .cse3) .cse5))) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse6 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 .cse4) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse6) (let ((.cse7 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse7 .cse2) 4294967296) 4294967296) .cse3) .cse7)) (< .cse6 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-11-23 02:35:43,811 WARN L233 SmtUtils]: Spent 10.29s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:35:46,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:35:48,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:35:50,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:35:52,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:35:54,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:35:56,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:35:58,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:00,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:02,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:04,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:06,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:08,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:12,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:14,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:16,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:23,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:25,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:27,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:30,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:32,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:34,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:36,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:38,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:40,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:42,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:44,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:46,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:48,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:36:50,745 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (let ((.cse1 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse1 .cse2) 4294967296) 4294967296) .cse3) .cse1)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (< .cse2 (mod (+ c_~b~0 c_~a~0) 4294967296)) (let ((.cse4 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse4 .cse2) 4294967296) 4294967296) .cse3) .cse4)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse5 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse5) (let ((.cse6 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse6 .cse2) 4294967296) 4294967296) .cse3) .cse6)) (< .cse5 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-11-23 02:36:52,785 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse2 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (= c_thread2Thread1of1ForFork2_~i~1 0) (let ((.cse0 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse0 .cse1) 4294967296) 4294967296) .cse2) .cse0)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse3 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse3) (let ((.cse4 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse4 .cse1) 4294967296) 4294967296) .cse2) .cse4)) (< .cse3 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-11-23 02:36:59,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:01,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:03,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:05,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:07,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:09,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:11,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:14,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:16,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:18,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:20,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:22,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:24,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:24,731 INFO L130 PetriNetUnfolder]: 2414/3747 cut-off events. [2022-11-23 02:37:24,731 INFO L131 PetriNetUnfolder]: For 14709/14709 co-relation queries the response was YES. [2022-11-23 02:37:24,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16103 conditions, 3747 events. 2414/3747 cut-off events. For 14709/14709 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19617 event pairs, 350 based on Foata normal form. 52/3799 useless extension candidates. Maximal degree in co-relation 11264. Up to 1294 conditions per place. [2022-11-23 02:37:24,814 INFO L137 encePairwiseOnDemand]: 173/186 looper letters, 225 selfloop transitions, 114 changer transitions 3/342 dead transitions. [2022-11-23 02:37:24,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 342 transitions, 2710 flow [2022-11-23 02:37:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 02:37:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-23 02:37:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2495 transitions. [2022-11-23 02:37:24,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47907066052227343 [2022-11-23 02:37:24,822 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2495 transitions. [2022-11-23 02:37:24,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2495 transitions. [2022-11-23 02:37:24,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:37:24,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2495 transitions. [2022-11-23 02:37:24,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 89.10714285714286) internal successors, (2495), 28 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:24,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 186.0) internal successors, (5394), 29 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:24,842 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 186.0) internal successors, (5394), 29 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:24,842 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 426 flow. Second operand 28 states and 2495 transitions. [2022-11-23 02:37:24,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 342 transitions, 2710 flow [2022-11-23 02:37:24,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 342 transitions, 2653 flow, removed 21 selfloop flow, removed 2 redundant places. [2022-11-23 02:37:24,887 INFO L231 Difference]: Finished difference. Result has 107 places, 157 transitions, 1749 flow [2022-11-23 02:37:24,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1749, PETRI_PLACES=107, PETRI_TRANSITIONS=157} [2022-11-23 02:37:24,891 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 78 predicate places. [2022-11-23 02:37:24,891 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 157 transitions, 1749 flow [2022-11-23 02:37:24,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 81.125) internal successors, (1298), 16 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:24,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:37:24,892 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] [2022-11-23 02:37:24,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:37:25,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:37:25,099 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:37:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:37:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1894352720, now seen corresponding path program 4 times [2022-11-23 02:37:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:37:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327857937] [2022-11-23 02:37:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:37:25,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:37:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:37:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:37:25,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:37:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327857937] [2022-11-23 02:37:25,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327857937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:37:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507197858] [2022-11-23 02:37:25,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:37:25,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:37:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:37:25,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:37:25,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:37:25,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:37:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:37:25,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:37:25,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:37:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:37:25,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:37:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:37:25,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507197858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:37:25,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:37:25,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 10 [2022-11-23 02:37:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683775348] [2022-11-23 02:37:25,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:37:25,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:37:25,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:37:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:37:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:37:25,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2022-11-23 02:37:25,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 157 transitions, 1749 flow. Second operand has 10 states, 10 states have (on average 84.2) internal successors, (842), 10 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:25,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:37:25,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2022-11-23 02:37:25,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:37:27,813 INFO L130 PetriNetUnfolder]: 3464/5427 cut-off events. [2022-11-23 02:37:27,813 INFO L131 PetriNetUnfolder]: For 87265/87265 co-relation queries the response was YES. [2022-11-23 02:37:27,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38043 conditions, 5427 events. 3464/5427 cut-off events. For 87265/87265 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30913 event pairs, 368 based on Foata normal form. 18/5445 useless extension candidates. Maximal degree in co-relation 33951. Up to 1912 conditions per place. [2022-11-23 02:37:27,882 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 290 selfloop transitions, 115 changer transitions 4/409 dead transitions. [2022-11-23 02:37:27,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 409 transitions, 5055 flow [2022-11-23 02:37:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 02:37:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-23 02:37:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1505 transitions. [2022-11-23 02:37:27,888 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5057123655913979 [2022-11-23 02:37:27,888 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1505 transitions. [2022-11-23 02:37:27,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1505 transitions. [2022-11-23 02:37:27,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:37:27,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1505 transitions. [2022-11-23 02:37:27,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.0625) internal successors, (1505), 16 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:27,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:27,900 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:27,900 INFO L175 Difference]: Start difference. First operand has 107 places, 157 transitions, 1749 flow. Second operand 16 states and 1505 transitions. [2022-11-23 02:37:27,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 409 transitions, 5055 flow [2022-11-23 02:37:28,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 409 transitions, 4699 flow, removed 178 selfloop flow, removed 0 redundant places. [2022-11-23 02:37:28,412 INFO L231 Difference]: Finished difference. Result has 131 places, 221 transitions, 2681 flow [2022-11-23 02:37:28,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2681, PETRI_PLACES=131, PETRI_TRANSITIONS=221} [2022-11-23 02:37:28,416 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 102 predicate places. [2022-11-23 02:37:28,416 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 221 transitions, 2681 flow [2022-11-23 02:37:28,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.2) internal successors, (842), 10 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:28,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:37:28,417 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] [2022-11-23 02:37:28,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 02:37:28,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:37:28,623 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:37:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:37:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash -858473226, now seen corresponding path program 5 times [2022-11-23 02:37:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:37:28,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517418963] [2022-11-23 02:37:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:37:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:37:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:37:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:37:28,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:37:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517418963] [2022-11-23 02:37:28,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517418963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:37:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681086209] [2022-11-23 02:37:28,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:37:28,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:37:28,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:37:28,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:37:28,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:37:29,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:37:29,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:37:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 02:37:29,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:37:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:37:29,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:37:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:37:29,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681086209] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:37:29,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:37:29,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 15 [2022-11-23 02:37:29,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359636473] [2022-11-23 02:37:29,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:37:29,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:37:29,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:37:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:37:29,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:37:29,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2022-11-23 02:37:29,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 221 transitions, 2681 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:29,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:37:29,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2022-11-23 02:37:29,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:37:31,638 INFO L130 PetriNetUnfolder]: 4184/6539 cut-off events. [2022-11-23 02:37:31,638 INFO L131 PetriNetUnfolder]: For 131181/131181 co-relation queries the response was YES. [2022-11-23 02:37:31,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49781 conditions, 6539 events. 4184/6539 cut-off events. For 131181/131181 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 38324 event pairs, 1048 based on Foata normal form. 16/6549 useless extension candidates. Maximal degree in co-relation 45337. Up to 2630 conditions per place. [2022-11-23 02:37:31,711 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 244 selfloop transitions, 106 changer transitions 1/351 dead transitions. [2022-11-23 02:37:31,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 351 transitions, 4891 flow [2022-11-23 02:37:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 02:37:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 02:37:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 755 transitions. [2022-11-23 02:37:31,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5073924731182796 [2022-11-23 02:37:31,715 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 755 transitions. [2022-11-23 02:37:31,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 755 transitions. [2022-11-23 02:37:31,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:37:31,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 755 transitions. [2022-11-23 02:37:31,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.375) internal successors, (755), 8 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:31,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:31,721 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:31,721 INFO L175 Difference]: Start difference. First operand has 131 places, 221 transitions, 2681 flow. Second operand 8 states and 755 transitions. [2022-11-23 02:37:31,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 351 transitions, 4891 flow [2022-11-23 02:37:32,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 351 transitions, 4689 flow, removed 92 selfloop flow, removed 1 redundant places. [2022-11-23 02:37:32,262 INFO L231 Difference]: Finished difference. Result has 143 places, 253 transitions, 3445 flow [2022-11-23 02:37:32,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3445, PETRI_PLACES=143, PETRI_TRANSITIONS=253} [2022-11-23 02:37:32,263 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2022-11-23 02:37:32,263 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 253 transitions, 3445 flow [2022-11-23 02:37:32,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:37:32,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:37:32,264 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] [2022-11-23 02:37:32,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:37:32,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:37:32,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:37:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:37:32,470 INFO L85 PathProgramCache]: Analyzing trace with hash -859446824, now seen corresponding path program 6 times [2022-11-23 02:37:32,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:37:32,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826191249] [2022-11-23 02:37:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:37:32,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:37:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:37:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:37:32,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:37:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826191249] [2022-11-23 02:37:32,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826191249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:37:32,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494005045] [2022-11-23 02:37:32,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:37:32,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:37:32,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:37:32,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:37:32,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:37:32,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 02:37:32,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:37:32,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 02:37:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:37:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:37:33,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:37:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:37:37,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494005045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:37:37,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:37:37,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-11-23 02:37:37,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299143839] [2022-11-23 02:37:37,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:37:37,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:37:37,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:37:37,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:37:37,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:37:39,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:41,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:43,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:45,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:47,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:49,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:51,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:53,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:56,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:37:58,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:01,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:03,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:05,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:05,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 186 [2022-11-23 02:38:05,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 253 transitions, 3445 flow. Second operand has 16 states, 16 states have (on average 78.875) internal successors, (1262), 16 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:38:05,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:38:05,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 186 [2022-11-23 02:38:05,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:38:16,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:18,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:20,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:22,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:25,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:27,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:29,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:31,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:33,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:35,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:37,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:39,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:41,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:43,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:45,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:51,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:53,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:55,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:57,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:38:59,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:01,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:04,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:06,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:08,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:10,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:12,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:49,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:51,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:53,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:55,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:57,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:39:59,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:01,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:03,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:05,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:07,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:09,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:11,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:13,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:15,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:17,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:19,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:21,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:23,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:25,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:27,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:29,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:31,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:33,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:36,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:40,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:42,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:44,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:47,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:40:48,596 INFO L130 PetriNetUnfolder]: 6740/10743 cut-off events. [2022-11-23 02:40:48,596 INFO L131 PetriNetUnfolder]: For 230098/230098 co-relation queries the response was YES. [2022-11-23 02:40:48,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84550 conditions, 10743 events. 6740/10743 cut-off events. For 230098/230098 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 71428 event pairs, 666 based on Foata normal form. 36/10773 useless extension candidates. Maximal degree in co-relation 82874. Up to 4855 conditions per place. [2022-11-23 02:40:48,794 INFO L137 encePairwiseOnDemand]: 176/186 looper letters, 312 selfloop transitions, 307 changer transitions 4/623 dead transitions. [2022-11-23 02:40:48,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 623 transitions, 9434 flow [2022-11-23 02:40:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 02:40:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 02:40:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1680 transitions. [2022-11-23 02:40:48,800 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47538200339558573 [2022-11-23 02:40:48,800 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1680 transitions. [2022-11-23 02:40:48,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1680 transitions. [2022-11-23 02:40:48,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:40:48,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1680 transitions. [2022-11-23 02:40:48,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 88.42105263157895) internal successors, (1680), 19 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:48,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:48,815 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:48,815 INFO L175 Difference]: Start difference. First operand has 143 places, 253 transitions, 3445 flow. Second operand 19 states and 1680 transitions. [2022-11-23 02:40:48,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 623 transitions, 9434 flow [2022-11-23 02:40:50,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 623 transitions, 9384 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-11-23 02:40:50,096 INFO L231 Difference]: Finished difference. Result has 173 places, 422 transitions, 7282 flow [2022-11-23 02:40:50,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7282, PETRI_PLACES=173, PETRI_TRANSITIONS=422} [2022-11-23 02:40:50,097 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 144 predicate places. [2022-11-23 02:40:50,097 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 422 transitions, 7282 flow [2022-11-23 02:40:50,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 78.875) internal successors, (1262), 16 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:50,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:40:50,098 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] [2022-11-23 02:40:50,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:40:50,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 02:40:50,305 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:40:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:40:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1714109042, now seen corresponding path program 7 times [2022-11-23 02:40:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:40:50,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501290468] [2022-11-23 02:40:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:40:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:40:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:40:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:40:50,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:40:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501290468] [2022-11-23 02:40:50,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501290468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:40:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210800775] [2022-11-23 02:40:50,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:40:50,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:40:50,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:40:50,543 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:40:50,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:40:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:40:50,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 02:40:50,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:40:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:40:50,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:40:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:40:50,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210800775] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:40:50,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:40:50,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 10 [2022-11-23 02:40:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328053269] [2022-11-23 02:40:50,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:40:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:40:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:40:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:40:50,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:40:51,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-23 02:40:51,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 422 transitions, 7282 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:51,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:40:51,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-23 02:40:51,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:40:53,985 INFO L130 PetriNetUnfolder]: 6612/10572 cut-off events. [2022-11-23 02:40:53,985 INFO L131 PetriNetUnfolder]: For 266248/266382 co-relation queries the response was YES. [2022-11-23 02:40:54,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90157 conditions, 10572 events. 6612/10572 cut-off events. For 266248/266382 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 69888 event pairs, 2038 based on Foata normal form. 40/10548 useless extension candidates. Maximal degree in co-relation 89135. Up to 5046 conditions per place. [2022-11-23 02:40:54,161 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 382 selfloop transitions, 103 changer transitions 1/501 dead transitions. [2022-11-23 02:40:54,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 501 transitions, 9243 flow [2022-11-23 02:40:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:40:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:40:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2022-11-23 02:40:54,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5197132616487455 [2022-11-23 02:40:54,165 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2022-11-23 02:40:54,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2022-11-23 02:40:54,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:40:54,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2022-11-23 02:40:54,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:54,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:54,170 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:54,170 INFO L175 Difference]: Start difference. First operand has 173 places, 422 transitions, 7282 flow. Second operand 6 states and 580 transitions. [2022-11-23 02:40:54,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 501 transitions, 9243 flow [2022-11-23 02:40:55,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 501 transitions, 9029 flow, removed 107 selfloop flow, removed 0 redundant places. [2022-11-23 02:40:55,773 INFO L231 Difference]: Finished difference. Result has 181 places, 425 transitions, 7438 flow [2022-11-23 02:40:55,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=7092, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7438, PETRI_PLACES=181, PETRI_TRANSITIONS=425} [2022-11-23 02:40:55,774 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2022-11-23 02:40:55,775 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 425 transitions, 7438 flow [2022-11-23 02:40:55,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:55,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:40:55,775 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] [2022-11-23 02:40:55,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:40:55,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:40:55,976 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:40:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:40:55,977 INFO L85 PathProgramCache]: Analyzing trace with hash -936539866, now seen corresponding path program 8 times [2022-11-23 02:40:55,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:40:55,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989387928] [2022-11-23 02:40:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:40:55,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:40:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:40:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:40:56,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:40:56,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989387928] [2022-11-23 02:40:56,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989387928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:40:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72781683] [2022-11-23 02:40:56,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:40:56,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:40:56,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:40:56,200 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:40:56,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:40:56,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:40:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:40:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:40:56,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:40:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:40:56,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:40:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:40:56,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72781683] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:40:56,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:40:56,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-11-23 02:40:56,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440210645] [2022-11-23 02:40:56,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:40:56,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:40:56,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:40:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:40:56,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:40:57,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-23 02:40:57,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 425 transitions, 7438 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:40:57,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:40:57,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-23 02:40:57,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:40:59,761 INFO L130 PetriNetUnfolder]: 6584/10524 cut-off events. [2022-11-23 02:40:59,762 INFO L131 PetriNetUnfolder]: For 261503/261630 co-relation queries the response was YES. [2022-11-23 02:40:59,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89344 conditions, 10524 events. 6584/10524 cut-off events. For 261503/261630 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 69609 event pairs, 2104 based on Foata normal form. 40/10500 useless extension candidates. Maximal degree in co-relation 88286. Up to 5334 conditions per place. [2022-11-23 02:41:00,092 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 399 selfloop transitions, 88 changer transitions 1/503 dead transitions. [2022-11-23 02:41:00,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 503 transitions, 9374 flow [2022-11-23 02:41:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:41:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:41:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 582 transitions. [2022-11-23 02:41:00,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.521505376344086 [2022-11-23 02:41:00,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 582 transitions. [2022-11-23 02:41:00,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 582 transitions. [2022-11-23 02:41:00,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:41:00,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 582 transitions. [2022-11-23 02:41:00,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:00,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:00,100 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:00,100 INFO L175 Difference]: Start difference. First operand has 181 places, 425 transitions, 7438 flow. Second operand 6 states and 582 transitions. [2022-11-23 02:41:00,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 503 transitions, 9374 flow [2022-11-23 02:41:01,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 503 transitions, 9221 flow, removed 16 selfloop flow, removed 2 redundant places. [2022-11-23 02:41:01,577 INFO L231 Difference]: Finished difference. Result has 187 places, 428 transitions, 7594 flow [2022-11-23 02:41:01,577 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=7286, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7594, PETRI_PLACES=187, PETRI_TRANSITIONS=428} [2022-11-23 02:41:01,578 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 158 predicate places. [2022-11-23 02:41:01,578 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 428 transitions, 7594 flow [2022-11-23 02:41:01,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:01,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:41:01,578 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] [2022-11-23 02:41:01,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:41:01,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:41:01,783 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:41:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:41:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1222152098, now seen corresponding path program 9 times [2022-11-23 02:41:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:41:01,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969208065] [2022-11-23 02:41:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:41:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:41:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:41:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:02,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:41:02,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969208065] [2022-11-23 02:41:02,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969208065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:41:02,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029467418] [2022-11-23 02:41:02,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:41:02,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:41:02,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:41:02,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:41:02,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:41:02,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:41:02,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:41:02,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 02:41:02,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:41:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:02,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:41:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:02,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029467418] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:41:02,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:41:02,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 17 [2022-11-23 02:41:02,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010997101] [2022-11-23 02:41:02,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:41:02,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:41:02,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:41:02,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:41:02,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:41:02,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-23 02:41:02,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 428 transitions, 7594 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:02,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:41:02,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-23 02:41:02,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:41:05,710 INFO L130 PetriNetUnfolder]: 6540/10420 cut-off events. [2022-11-23 02:41:05,711 INFO L131 PetriNetUnfolder]: For 265193/265320 co-relation queries the response was YES. [2022-11-23 02:41:05,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89205 conditions, 10420 events. 6540/10420 cut-off events. For 265193/265320 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 68395 event pairs, 2098 based on Foata normal form. 48/10404 useless extension candidates. Maximal degree in co-relation 88160. Up to 5334 conditions per place. [2022-11-23 02:41:05,892 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 395 selfloop transitions, 89 changer transitions 1/500 dead transitions. [2022-11-23 02:41:05,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 500 transitions, 9456 flow [2022-11-23 02:41:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:41:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:41:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2022-11-23 02:41:05,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5197132616487455 [2022-11-23 02:41:05,895 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2022-11-23 02:41:05,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2022-11-23 02:41:05,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:41:05,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2022-11-23 02:41:05,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:05,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:05,900 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:05,900 INFO L175 Difference]: Start difference. First operand has 187 places, 428 transitions, 7594 flow. Second operand 6 states and 580 transitions. [2022-11-23 02:41:05,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 500 transitions, 9456 flow [2022-11-23 02:41:07,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 500 transitions, 9339 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-11-23 02:41:07,416 INFO L231 Difference]: Finished difference. Result has 192 places, 430 transitions, 7752 flow [2022-11-23 02:41:07,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=7477, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7752, PETRI_PLACES=192, PETRI_TRANSITIONS=430} [2022-11-23 02:41:07,417 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2022-11-23 02:41:07,418 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 430 transitions, 7752 flow [2022-11-23 02:41:07,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:07,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:41:07,418 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] [2022-11-23 02:41:07,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:41:07,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:41:07,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:41:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:41:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1692735358, now seen corresponding path program 10 times [2022-11-23 02:41:07,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:41:07,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741666956] [2022-11-23 02:41:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:41:07,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:41:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:41:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:07,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:41:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741666956] [2022-11-23 02:41:07,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741666956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:41:07,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905356891] [2022-11-23 02:41:07,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:41:07,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:41:07,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:41:07,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:41:07,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:41:07,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:41:07,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:41:08,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:41:08,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:41:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:08,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:41:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:08,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905356891] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:41:08,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:41:08,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-11-23 02:41:08,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128871791] [2022-11-23 02:41:08,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:41:08,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:41:08,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:41:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:41:08,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:41:08,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 186 [2022-11-23 02:41:08,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 430 transitions, 7752 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:08,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:41:08,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 186 [2022-11-23 02:41:08,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:41:11,098 INFO L130 PetriNetUnfolder]: 6498/10328 cut-off events. [2022-11-23 02:41:11,098 INFO L131 PetriNetUnfolder]: For 267518/267645 co-relation queries the response was YES. [2022-11-23 02:41:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89110 conditions, 10328 events. 6498/10328 cut-off events. For 267518/267645 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 67413 event pairs, 1986 based on Foata normal form. 48/10312 useless extension candidates. Maximal degree in co-relation 88063. Up to 5046 conditions per place. [2022-11-23 02:41:11,307 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 376 selfloop transitions, 104 changer transitions 1/496 dead transitions. [2022-11-23 02:41:11,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 496 transitions, 9520 flow [2022-11-23 02:41:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:41:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:41:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 576 transitions. [2022-11-23 02:41:11,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2022-11-23 02:41:11,310 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 576 transitions. [2022-11-23 02:41:11,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 576 transitions. [2022-11-23 02:41:11,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:41:11,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 576 transitions. [2022-11-23 02:41:11,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:11,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:11,315 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 186.0) internal successors, (1302), 7 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:11,315 INFO L175 Difference]: Start difference. First operand has 192 places, 430 transitions, 7752 flow. Second operand 6 states and 576 transitions. [2022-11-23 02:41:11,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 496 transitions, 9520 flow [2022-11-23 02:41:13,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 496 transitions, 9330 flow, removed 21 selfloop flow, removed 3 redundant places. [2022-11-23 02:41:13,253 INFO L231 Difference]: Finished difference. Result has 196 places, 432 transitions, 7867 flow [2022-11-23 02:41:13,254 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=7566, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7867, PETRI_PLACES=196, PETRI_TRANSITIONS=432} [2022-11-23 02:41:13,255 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2022-11-23 02:41:13,255 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 432 transitions, 7867 flow [2022-11-23 02:41:13,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:13,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:41:13,256 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] [2022-11-23 02:41:13,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:41:13,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 02:41:13,457 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:41:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:41:13,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1767489023, now seen corresponding path program 1 times [2022-11-23 02:41:13,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:41:13,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764098184] [2022-11-23 02:41:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:41:13,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:41:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:41:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:13,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:41:13,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764098184] [2022-11-23 02:41:13,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764098184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:41:13,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230782536] [2022-11-23 02:41:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:41:13,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:41:13,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:41:13,703 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:41:13,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:41:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:41:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:41:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:41:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:14,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:41:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230782536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:41:18,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:41:18,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2022-11-23 02:41:18,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705295131] [2022-11-23 02:41:18,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:41:18,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 02:41:18,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:41:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 02:41:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:41:18,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 186 [2022-11-23 02:41:18,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 432 transitions, 7867 flow. Second operand has 15 states, 15 states have (on average 82.66666666666667) internal successors, (1240), 15 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:18,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:41:18,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 186 [2022-11-23 02:41:18,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:41:25,748 INFO L130 PetriNetUnfolder]: 10202/16379 cut-off events. [2022-11-23 02:41:25,748 INFO L131 PetriNetUnfolder]: For 425513/425513 co-relation queries the response was YES. [2022-11-23 02:41:25,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141354 conditions, 16379 events. 10202/16379 cut-off events. For 425513/425513 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 117593 event pairs, 1760 based on Foata normal form. 82/16461 useless extension candidates. Maximal degree in co-relation 140120. Up to 5811 conditions per place. [2022-11-23 02:41:26,105 INFO L137 encePairwiseOnDemand]: 176/186 looper letters, 642 selfloop transitions, 460 changer transitions 6/1108 dead transitions. [2022-11-23 02:41:26,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1108 transitions, 19780 flow [2022-11-23 02:41:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 02:41:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-23 02:41:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2958 transitions. [2022-11-23 02:41:26,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4969758064516129 [2022-11-23 02:41:26,113 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2958 transitions. [2022-11-23 02:41:26,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2958 transitions. [2022-11-23 02:41:26,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:41:26,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2958 transitions. [2022-11-23 02:41:26,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 92.4375) internal successors, (2958), 32 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:26,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 186.0) internal successors, (6138), 33 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:26,136 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 186.0) internal successors, (6138), 33 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:26,136 INFO L175 Difference]: Start difference. First operand has 196 places, 432 transitions, 7867 flow. Second operand 32 states and 2958 transitions. [2022-11-23 02:41:26,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1108 transitions, 19780 flow [2022-11-23 02:41:30,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1108 transitions, 19440 flow, removed 25 selfloop flow, removed 3 redundant places. [2022-11-23 02:41:30,568 INFO L231 Difference]: Finished difference. Result has 249 places, 703 transitions, 14659 flow [2022-11-23 02:41:30,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14659, PETRI_PLACES=249, PETRI_TRANSITIONS=703} [2022-11-23 02:41:30,570 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 220 predicate places. [2022-11-23 02:41:30,570 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 703 transitions, 14659 flow [2022-11-23 02:41:30,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.66666666666667) internal successors, (1240), 15 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:30,571 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:41:30,572 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] [2022-11-23 02:41:30,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-23 02:41:30,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:41:30,778 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:41:30,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:41:30,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1410779399, now seen corresponding path program 2 times [2022-11-23 02:41:30,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:41:30,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706451810] [2022-11-23 02:41:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:41:30,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:41:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:41:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:31,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:41:31,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706451810] [2022-11-23 02:41:31,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706451810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:41:31,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522526704] [2022-11-23 02:41:31,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:41:31,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:41:31,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:41:31,035 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:41:31,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 02:41:31,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:41:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:41:31,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 02:41:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:41:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:31,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:41:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:31,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522526704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:41:31,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:41:31,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 02:41:31,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140797729] [2022-11-23 02:41:31,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:41:31,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:41:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:41:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:41:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-23 02:41:31,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2022-11-23 02:41:31,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 703 transitions, 14659 flow. Second operand has 13 states, 13 states have (on average 83.53846153846153) internal successors, (1086), 13 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:31,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:41:31,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2022-11-23 02:41:31,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:41:39,617 INFO L130 PetriNetUnfolder]: 10710/17261 cut-off events. [2022-11-23 02:41:39,618 INFO L131 PetriNetUnfolder]: For 571088/571088 co-relation queries the response was YES. [2022-11-23 02:41:39,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167777 conditions, 17261 events. 10710/17261 cut-off events. For 571088/571088 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 125080 event pairs, 4008 based on Foata normal form. 40/17301 useless extension candidates. Maximal degree in co-relation 167131. Up to 11254 conditions per place. [2022-11-23 02:41:40,011 INFO L137 encePairwiseOnDemand]: 178/186 looper letters, 691 selfloop transitions, 124 changer transitions 2/817 dead transitions. [2022-11-23 02:41:40,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 817 transitions, 17921 flow [2022-11-23 02:41:40,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:41:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:41:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 662 transitions. [2022-11-23 02:41:40,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5084485407066052 [2022-11-23 02:41:40,013 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 662 transitions. [2022-11-23 02:41:40,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 662 transitions. [2022-11-23 02:41:40,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:41:40,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 662 transitions. [2022-11-23 02:41:40,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.57142857142857) internal successors, (662), 7 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:40,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:40,018 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:40,018 INFO L175 Difference]: Start difference. First operand has 249 places, 703 transitions, 14659 flow. Second operand 7 states and 662 transitions. [2022-11-23 02:41:40,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 817 transitions, 17921 flow [2022-11-23 02:41:45,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 817 transitions, 17337 flow, removed 284 selfloop flow, removed 1 redundant places. [2022-11-23 02:41:45,464 INFO L231 Difference]: Finished difference. Result has 257 places, 726 transitions, 14949 flow [2022-11-23 02:41:45,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=14147, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14949, PETRI_PLACES=257, PETRI_TRANSITIONS=726} [2022-11-23 02:41:45,465 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2022-11-23 02:41:45,466 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 726 transitions, 14949 flow [2022-11-23 02:41:45,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.53846153846153) internal successors, (1086), 13 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:45,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:41:45,466 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] [2022-11-23 02:41:45,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 02:41:45,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 02:41:45,667 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:41:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:41:45,667 INFO L85 PathProgramCache]: Analyzing trace with hash -622318658, now seen corresponding path program 2 times [2022-11-23 02:41:45,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:41:45,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620214515] [2022-11-23 02:41:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:41:45,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:41:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:41:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:45,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:41:45,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620214515] [2022-11-23 02:41:45,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620214515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:41:45,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:41:45,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:41:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690312106] [2022-11-23 02:41:45,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:41:45,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:41:45,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:41:45,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:41:45,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:41:45,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 186 [2022-11-23 02:41:45,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 726 transitions, 14949 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:45,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:41:45,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 186 [2022-11-23 02:41:45,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:41:52,664 INFO L130 PetriNetUnfolder]: 11066/17939 cut-off events. [2022-11-23 02:41:52,664 INFO L131 PetriNetUnfolder]: For 584223/584223 co-relation queries the response was YES. [2022-11-23 02:41:52,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171206 conditions, 17939 events. 11066/17939 cut-off events. For 584223/584223 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 132300 event pairs, 3948 based on Foata normal form. 82/18021 useless extension candidates. Maximal degree in co-relation 170581. Up to 11254 conditions per place. [2022-11-23 02:41:53,119 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 739 selfloop transitions, 120 changer transitions 18/877 dead transitions. [2022-11-23 02:41:53,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 877 transitions, 19013 flow [2022-11-23 02:41:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 02:41:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 02:41:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 737 transitions. [2022-11-23 02:41:53,121 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4952956989247312 [2022-11-23 02:41:53,122 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 737 transitions. [2022-11-23 02:41:53,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 737 transitions. [2022-11-23 02:41:53,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:41:53,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 737 transitions. [2022-11-23 02:41:53,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 92.125) internal successors, (737), 8 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:53,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:53,125 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:53,126 INFO L175 Difference]: Start difference. First operand has 257 places, 726 transitions, 14949 flow. Second operand 8 states and 737 transitions. [2022-11-23 02:41:53,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 877 transitions, 19013 flow [2022-11-23 02:41:58,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 877 transitions, 18906 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-11-23 02:41:58,919 INFO L231 Difference]: Finished difference. Result has 267 places, 763 transitions, 16069 flow [2022-11-23 02:41:58,920 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=14850, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16069, PETRI_PLACES=267, PETRI_TRANSITIONS=763} [2022-11-23 02:41:58,920 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 238 predicate places. [2022-11-23 02:41:58,921 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 763 transitions, 16069 flow [2022-11-23 02:41:58,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:41:58,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:41:58,921 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] [2022-11-23 02:41:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 02:41:58,922 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:41:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:41:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1600107017, now seen corresponding path program 3 times [2022-11-23 02:41:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:41:58,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949075430] [2022-11-23 02:41:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:41:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:41:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:41:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:59,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:41:59,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949075430] [2022-11-23 02:41:59,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949075430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:41:59,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263861691] [2022-11-23 02:41:59,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:41:59,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:41:59,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:41:59,131 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:41:59,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c038fac6-38f3-42ac-9ea5-48c5a9ef6fcb/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 02:41:59,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:41:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:41:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:41:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:41:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:59,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:41:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:41:59,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263861691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:41:59,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:41:59,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-11-23 02:41:59,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714294781] [2022-11-23 02:41:59,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:41:59,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:41:59,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:41:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:41:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:42:00,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 186 [2022-11-23 02:42:00,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 763 transitions, 16069 flow. Second operand has 16 states, 16 states have (on average 82.25) internal successors, (1316), 16 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:42:00,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:42:00,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 186 [2022-11-23 02:42:00,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:42:10,956 INFO L130 PetriNetUnfolder]: 13201/21496 cut-off events. [2022-11-23 02:42:10,956 INFO L131 PetriNetUnfolder]: For 795938/795938 co-relation queries the response was YES. [2022-11-23 02:42:11,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213329 conditions, 21496 events. 13201/21496 cut-off events. For 795938/795938 co-relation queries the response was YES. Maximal size of possible extension queue 1276. Compared 163943 event pairs, 2543 based on Foata normal form. 82/21578 useless extension candidates. Maximal degree in co-relation 212699. Up to 7422 conditions per place. [2022-11-23 02:42:11,524 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 694 selfloop transitions, 635 changer transitions 3/1332 dead transitions. [2022-11-23 02:42:11,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1332 transitions, 27440 flow [2022-11-23 02:42:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 02:42:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 02:42:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3050 transitions. [2022-11-23 02:42:11,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4969045291625937 [2022-11-23 02:42:11,532 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3050 transitions. [2022-11-23 02:42:11,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3050 transitions. [2022-11-23 02:42:11,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:42:11,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3050 transitions. [2022-11-23 02:42:11,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 92.42424242424242) internal successors, (3050), 33 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:42:11,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 186.0) internal successors, (6324), 34 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:42:11,553 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 186.0) internal successors, (6324), 34 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:42:11,553 INFO L175 Difference]: Start difference. First operand has 267 places, 763 transitions, 16069 flow. Second operand 33 states and 3050 transitions. [2022-11-23 02:42:11,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1332 transitions, 27440 flow