./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a --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 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --- 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-b5237d8 [2022-11-21 16:23:14,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:23:14,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:23:14,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:23:14,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:23:14,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:23:14,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:23:14,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:23:14,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:23:14,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:23:14,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:23:14,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:23:14,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:23:14,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:23:14,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:23:14,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:23:14,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:23:14,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:23:14,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:23:14,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:23:14,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:23:14,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:23:14,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:23:14,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:23:14,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:23:14,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:23:14,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:23:14,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:23:14,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:23:14,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:23:14,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:23:14,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:23:14,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:23:14,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:23:14,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:23:14,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:23:14,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:23:14,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:23:14,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:23:14,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:23:14,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:23:14,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:23:14,203 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:23:14,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:23:14,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:23:14,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:23:14,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:23:14,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:23:14,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:23:14,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:23:14,207 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:23:14,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:23:14,209 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:23:14,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:23:14,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:23:14,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:23:14,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:23:14,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:23:14,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:23:14,210 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:23:14,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:23:14,211 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:23:14,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:23:14,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:23:14,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:23:14,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:23:14,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:23:14,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:23:14,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:23:14,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:23:14,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:23:14,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:23:14,214 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:23:14,214 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:23:14,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:23:14,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 [2022-11-21 16:23:14,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:23:14,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:23:14,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:23:14,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:23:14,568 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:23:14,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread/queue_longest.i [2022-11-21 16:23:17,550 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:23:17,917 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:23:17,918 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/sv-benchmarks/c/pthread/queue_longest.i [2022-11-21 16:23:17,953 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/data/9798cf8dc/dcae9f4dfb764d0eb614b599f2ef15e8/FLAGba5fe3234 [2022-11-21 16:23:17,973 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/data/9798cf8dc/dcae9f4dfb764d0eb614b599f2ef15e8 [2022-11-21 16:23:17,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:23:17,978 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:23:17,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:23:17,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:23:17,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:23:17,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:23:17" (1/1) ... [2022-11-21 16:23:17,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a15d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:17, skipping insertion in model container [2022-11-21 16:23:17,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:23:17" (1/1) ... [2022-11-21 16:23:17,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:23:18,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:23:18,491 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_f07c53da-59a0-4d21-b766-031353b92452/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-11-21 16:23:18,498 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_f07c53da-59a0-4d21-b766-031353b92452/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-11-21 16:23:18,501 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_f07c53da-59a0-4d21-b766-031353b92452/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-11-21 16:23:18,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:23:18,517 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:23:18,564 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_f07c53da-59a0-4d21-b766-031353b92452/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-11-21 16:23:18,566 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_f07c53da-59a0-4d21-b766-031353b92452/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-11-21 16:23:18,569 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_f07c53da-59a0-4d21-b766-031353b92452/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-11-21 16:23:18,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:23:18,625 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:23:18,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18 WrapperNode [2022-11-21 16:23:18,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:23:18,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:23:18,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:23:18,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:23:18,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,680 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 241 [2022-11-21 16:23:18,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:23:18,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:23:18,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:23:18,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:23:18,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,713 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:23:18,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:23:18,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:23:18,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:23:18,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (1/1) ... [2022-11-21 16:23:18,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:23:18,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:23:18,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:23:18,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f07c53da-59a0-4d21-b766-031353b92452/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:23:18,809 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-21 16:23:18,810 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-21 16:23:18,810 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-21 16:23:18,811 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-21 16:23:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:23:18,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:23:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:23:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:23:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 16:23:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:23:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:23:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:23:18,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:23:18,814 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:23:19,025 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:23:19,029 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:23:19,462 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:23:19,473 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:23:19,473 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 16:23:19,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:23:19 BoogieIcfgContainer [2022-11-21 16:23:19,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:23:19,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:23:19,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:23:19,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:23:19,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:23:17" (1/3) ... [2022-11-21 16:23:19,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13310cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:23:19, skipping insertion in model container [2022-11-21 16:23:19,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:18" (2/3) ... [2022-11-21 16:23:19,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13310cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:23:19, skipping insertion in model container [2022-11-21 16:23:19,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:23:19" (3/3) ... [2022-11-21 16:23:19,485 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2022-11-21 16:23:19,494 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:23:19,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:23:19,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-21 16:23:19,505 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:23:19,702 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 16:23:19,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 272 transitions, 560 flow [2022-11-21 16:23:19,899 INFO L130 PetriNetUnfolder]: 15/270 cut-off events. [2022-11-21 16:23:19,899 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:23:19,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 270 events. 15/270 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 361 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-11-21 16:23:19,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 272 transitions, 560 flow [2022-11-21 16:23:19,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 260 transitions, 529 flow [2022-11-21 16:23:19,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:23:19,957 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;@58ef92bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:23:19,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 16:23:19,968 INFO L130 PetriNetUnfolder]: 1/63 cut-off events. [2022-11-21 16:23:19,969 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:23:19,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:19,970 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:19,970 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 4 more)] === [2022-11-21 16:23:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash -244896479, now seen corresponding path program 1 times [2022-11-21 16:23:19,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:19,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874101736] [2022-11-21 16:23:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:19,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:20,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:20,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874101736] [2022-11-21 16:23:20,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874101736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:20,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:20,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:23:20,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347320755] [2022-11-21 16:23:20,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:20,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:23:20,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:20,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:23:20,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:23:20,367 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 272 [2022-11-21 16:23:20,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 260 transitions, 529 flow. Second operand has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:20,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:20,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 272 [2022-11-21 16:23:20,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:20,472 INFO L130 PetriNetUnfolder]: 10/249 cut-off events. [2022-11-21 16:23:20,472 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-11-21 16:23:20,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 10/249 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 280 event pairs, 0 based on Foata normal form. 7/244 useless extension candidates. Maximal degree in co-relation 189. Up to 4 conditions per place. [2022-11-21 16:23:20,476 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 3 selfloop transitions, 0 changer transitions 0/249 dead transitions. [2022-11-21 16:23:20,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 249 transitions, 513 flow [2022-11-21 16:23:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:23:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:23:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 526 transitions. [2022-11-21 16:23:20,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9669117647058824 [2022-11-21 16:23:20,501 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 526 transitions. [2022-11-21 16:23:20,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 526 transitions. [2022-11-21 16:23:20,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:20,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 526 transitions. [2022-11-21 16:23:20,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 263.0) internal successors, (526), 2 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:20,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:20,527 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:20,529 INFO L175 Difference]: Start difference. First operand has 252 places, 260 transitions, 529 flow. Second operand 2 states and 526 transitions. [2022-11-21 16:23:20,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 249 transitions, 513 flow [2022-11-21 16:23:20,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 249 transitions, 508 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:23:20,541 INFO L231 Difference]: Finished difference. Result has 244 places, 249 transitions, 502 flow [2022-11-21 16:23:20,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=502, PETRI_PLACES=244, PETRI_TRANSITIONS=249} [2022-11-21 16:23:20,553 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -8 predicate places. [2022-11-21 16:23:20,554 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 249 transitions, 502 flow [2022-11-21 16:23:20,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 259.5) internal successors, (519), 2 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:20,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:20,555 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:20,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:23:20,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash -134729215, now seen corresponding path program 1 times [2022-11-21 16:23:20,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:20,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40183717] [2022-11-21 16:23:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:20,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:21,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40183717] [2022-11-21 16:23:21,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40183717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:21,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:21,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-21 16:23:21,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565922431] [2022-11-21 16:23:21,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:21,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:23:21,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:21,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:23:21,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:23:21,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 272 [2022-11-21 16:23:21,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 249 transitions, 502 flow. Second operand has 12 states, 12 states have (on average 197.75) internal successors, (2373), 12 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:21,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:21,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 272 [2022-11-21 16:23:21,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:23,132 INFO L130 PetriNetUnfolder]: 1003/4115 cut-off events. [2022-11-21 16:23:23,133 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-21 16:23:23,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5626 conditions, 4115 events. 1003/4115 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 33945 event pairs, 789 based on Foata normal form. 0/3829 useless extension candidates. Maximal degree in co-relation 5623. Up to 1435 conditions per place. [2022-11-21 16:23:23,162 INFO L137 encePairwiseOnDemand]: 259/272 looper letters, 52 selfloop transitions, 12 changer transitions 0/245 dead transitions. [2022-11-21 16:23:23,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 245 transitions, 622 flow [2022-11-21 16:23:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:23:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-21 16:23:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2600 transitions. [2022-11-21 16:23:23,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7352941176470589 [2022-11-21 16:23:23,171 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2600 transitions. [2022-11-21 16:23:23,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2600 transitions. [2022-11-21 16:23:23,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:23,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2600 transitions. [2022-11-21 16:23:23,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 200.0) internal successors, (2600), 13 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 272.0) internal successors, (3808), 14 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,190 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 272.0) internal successors, (3808), 14 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,190 INFO L175 Difference]: Start difference. First operand has 244 places, 249 transitions, 502 flow. Second operand 13 states and 2600 transitions. [2022-11-21 16:23:23,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 245 transitions, 622 flow [2022-11-21 16:23:23,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 245 transitions, 622 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:23:23,201 INFO L231 Difference]: Finished difference. Result has 253 places, 245 transitions, 518 flow [2022-11-21 16:23:23,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=518, PETRI_PLACES=253, PETRI_TRANSITIONS=245} [2022-11-21 16:23:23,202 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, 1 predicate places. [2022-11-21 16:23:23,203 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 245 transitions, 518 flow [2022-11-21 16:23:23,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 197.75) internal successors, (2373), 12 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:23,205 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:23,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:23:23,205 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:23,207 INFO L85 PathProgramCache]: Analyzing trace with hash -709610595, now seen corresponding path program 1 times [2022-11-21 16:23:23,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:23,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056833667] [2022-11-21 16:23:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:23,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:23,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:23,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056833667] [2022-11-21 16:23:23,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056833667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:23,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:23,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:23:23,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27411296] [2022-11-21 16:23:23,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:23,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:23:23,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:23,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:23:23,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:23:23,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 272 [2022-11-21 16:23:23,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 245 transitions, 518 flow. Second operand has 4 states, 4 states have (on average 249.75) internal successors, (999), 4 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:23,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 272 [2022-11-21 16:23:23,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:23,446 INFO L130 PetriNetUnfolder]: 26/430 cut-off events. [2022-11-21 16:23:23,447 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 16:23:23,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 430 events. 26/430 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1082 event pairs, 2 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 493. Up to 13 conditions per place. [2022-11-21 16:23:23,450 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 9 selfloop transitions, 5 changer transitions 0/245 dead transitions. [2022-11-21 16:23:23,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 245 transitions, 550 flow [2022-11-21 16:23:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:23:23,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:23:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1007 transitions. [2022-11-21 16:23:23,457 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9255514705882353 [2022-11-21 16:23:23,457 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1007 transitions. [2022-11-21 16:23:23,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1007 transitions. [2022-11-21 16:23:23,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:23,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1007 transitions. [2022-11-21 16:23:23,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,465 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,465 INFO L175 Difference]: Start difference. First operand has 253 places, 245 transitions, 518 flow. Second operand 4 states and 1007 transitions. [2022-11-21 16:23:23,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 245 transitions, 550 flow [2022-11-21 16:23:23,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 245 transitions, 527 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-21 16:23:23,471 INFO L231 Difference]: Finished difference. Result has 244 places, 243 transitions, 501 flow [2022-11-21 16:23:23,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=501, PETRI_PLACES=244, PETRI_TRANSITIONS=243} [2022-11-21 16:23:23,473 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -8 predicate places. [2022-11-21 16:23:23,473 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 243 transitions, 501 flow [2022-11-21 16:23:23,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.75) internal successors, (999), 4 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:23,475 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:23,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:23:23,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash 105661887, now seen corresponding path program 1 times [2022-11-21 16:23:23,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:23,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018581325] [2022-11-21 16:23:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:23,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:23,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018581325] [2022-11-21 16:23:23,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018581325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:23,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:23,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:23:23,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175157948] [2022-11-21 16:23:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:23,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:23:23,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:23:23,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:23:23,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 272 [2022-11-21 16:23:23,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 243 transitions, 501 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:23,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 272 [2022-11-21 16:23:23,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:23,816 INFO L130 PetriNetUnfolder]: 33/525 cut-off events. [2022-11-21 16:23:23,817 INFO L131 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2022-11-21 16:23:23,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 525 events. 33/525 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1261 event pairs, 2 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 580. Up to 23 conditions per place. [2022-11-21 16:23:23,820 INFO L137 encePairwiseOnDemand]: 268/272 looper letters, 10 selfloop transitions, 3 changer transitions 0/247 dead transitions. [2022-11-21 16:23:23,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 247 transitions, 538 flow [2022-11-21 16:23:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:23:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:23:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2022-11-21 16:23:23,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9473039215686274 [2022-11-21 16:23:23,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2022-11-21 16:23:23,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2022-11-21 16:23:23,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:23,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2022-11-21 16:23:23,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,833 INFO L175 Difference]: Start difference. First operand has 244 places, 243 transitions, 501 flow. Second operand 3 states and 773 transitions. [2022-11-21 16:23:23,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 247 transitions, 538 flow [2022-11-21 16:23:23,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 247 transitions, 528 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:23:23,839 INFO L231 Difference]: Finished difference. Result has 244 places, 244 transitions, 506 flow [2022-11-21 16:23:23,840 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=506, PETRI_PLACES=244, PETRI_TRANSITIONS=244} [2022-11-21 16:23:23,842 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -8 predicate places. [2022-11-21 16:23:23,842 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 244 transitions, 506 flow [2022-11-21 16:23:23,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:23,843 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:23,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:23:23,844 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1557842589, now seen corresponding path program 1 times [2022-11-21 16:23:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:23,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512947965] [2022-11-21 16:23:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:23,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:23,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:23,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512947965] [2022-11-21 16:23:23,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512947965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:23,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:23,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:23:23,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375821716] [2022-11-21 16:23:23,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:23,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:23:23,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:23,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:23:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:23:23,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 272 [2022-11-21 16:23:23,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 244 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:23,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:23,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 272 [2022-11-21 16:23:23,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:24,220 INFO L130 PetriNetUnfolder]: 51/834 cut-off events. [2022-11-21 16:23:24,221 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-21 16:23:24,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 834 events. 51/834 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3006 event pairs, 7 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 938. Up to 27 conditions per place. [2022-11-21 16:23:24,227 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 15 selfloop transitions, 5 changer transitions 0/252 dead transitions. [2022-11-21 16:23:24,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 252 transitions, 569 flow [2022-11-21 16:23:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:23:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:23:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1271 transitions. [2022-11-21 16:23:24,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9345588235294118 [2022-11-21 16:23:24,232 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1271 transitions. [2022-11-21 16:23:24,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1271 transitions. [2022-11-21 16:23:24,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:24,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1271 transitions. [2022-11-21 16:23:24,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.2) internal successors, (1271), 5 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:24,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:24,244 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:24,244 INFO L175 Difference]: Start difference. First operand has 244 places, 244 transitions, 506 flow. Second operand 5 states and 1271 transitions. [2022-11-21 16:23:24,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 252 transitions, 569 flow [2022-11-21 16:23:24,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 252 transitions, 566 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:23:24,251 INFO L231 Difference]: Finished difference. Result has 250 places, 247 transitions, 533 flow [2022-11-21 16:23:24,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=533, PETRI_PLACES=250, PETRI_TRANSITIONS=247} [2022-11-21 16:23:24,254 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -2 predicate places. [2022-11-21 16:23:24,255 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 247 transitions, 533 flow [2022-11-21 16:23:24,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 251.75) internal successors, (1007), 4 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:24,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:24,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:24,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:23:24,257 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2105464912, now seen corresponding path program 1 times [2022-11-21 16:23:24,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:24,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948526238] [2022-11-21 16:23:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:24,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:25,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948526238] [2022-11-21 16:23:25,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948526238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:25,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:25,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-21 16:23:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203796294] [2022-11-21 16:23:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:23:25,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:23:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:23:25,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 272 [2022-11-21 16:23:25,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 247 transitions, 533 flow. Second operand has 17 states, 17 states have (on average 185.41176470588235) internal successors, (3152), 17 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:25,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:25,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 272 [2022-11-21 16:23:25,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:28,277 INFO L130 PetriNetUnfolder]: 1599/6667 cut-off events. [2022-11-21 16:23:28,278 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-21 16:23:28,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9621 conditions, 6667 events. 1599/6667 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 58236 event pairs, 1290 based on Foata normal form. 0/6316 useless extension candidates. Maximal degree in co-relation 9614. Up to 2556 conditions per place. [2022-11-21 16:23:28,318 INFO L137 encePairwiseOnDemand]: 256/272 looper letters, 79 selfloop transitions, 20 changer transitions 0/269 dead transitions. [2022-11-21 16:23:28,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 269 transitions, 777 flow [2022-11-21 16:23:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:23:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-21 16:23:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2846 transitions. [2022-11-21 16:23:28,325 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6975490196078431 [2022-11-21 16:23:28,326 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2846 transitions. [2022-11-21 16:23:28,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2846 transitions. [2022-11-21 16:23:28,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:28,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2846 transitions. [2022-11-21 16:23:28,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 189.73333333333332) internal successors, (2846), 15 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:28,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 272.0) internal successors, (4352), 16 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:28,344 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 272.0) internal successors, (4352), 16 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:28,344 INFO L175 Difference]: Start difference. First operand has 250 places, 247 transitions, 533 flow. Second operand 15 states and 2846 transitions. [2022-11-21 16:23:28,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 269 transitions, 777 flow [2022-11-21 16:23:28,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 269 transitions, 777 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:23:28,351 INFO L231 Difference]: Finished difference. Result has 270 places, 260 transitions, 640 flow [2022-11-21 16:23:28,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=640, PETRI_PLACES=270, PETRI_TRANSITIONS=260} [2022-11-21 16:23:28,352 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, 18 predicate places. [2022-11-21 16:23:28,352 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 260 transitions, 640 flow [2022-11-21 16:23:28,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 185.41176470588235) internal successors, (3152), 17 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:28,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:28,354 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:28,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:23:28,355 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:28,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1705964395, now seen corresponding path program 1 times [2022-11-21 16:23:28,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:28,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592602417] [2022-11-21 16:23:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:28,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:32,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:32,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592602417] [2022-11-21 16:23:32,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592602417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:32,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:32,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-21 16:23:32,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534409917] [2022-11-21 16:23:32,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:32,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 16:23:32,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 16:23:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:23:32,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 272 [2022-11-21 16:23:32,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 260 transitions, 640 flow. Second operand has 27 states, 27 states have (on average 171.92592592592592) internal successors, (4642), 27 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:32,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:32,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 272 [2022-11-21 16:23:32,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:36,636 INFO L130 PetriNetUnfolder]: 1457/6027 cut-off events. [2022-11-21 16:23:36,637 INFO L131 PetriNetUnfolder]: For 117/120 co-relation queries the response was YES. [2022-11-21 16:23:36,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8864 conditions, 6027 events. 1457/6027 cut-off events. For 117/120 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 51219 event pairs, 1160 based on Foata normal form. 2/5752 useless extension candidates. Maximal degree in co-relation 8850. Up to 2311 conditions per place. [2022-11-21 16:23:36,688 INFO L137 encePairwiseOnDemand]: 241/272 looper letters, 88 selfloop transitions, 45 changer transitions 0/295 dead transitions. [2022-11-21 16:23:36,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 295 transitions, 1000 flow [2022-11-21 16:23:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 16:23:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-21 16:23:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4724 transitions. [2022-11-21 16:23:36,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6432461873638344 [2022-11-21 16:23:36,700 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4724 transitions. [2022-11-21 16:23:36,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4724 transitions. [2022-11-21 16:23:36,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:36,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4724 transitions. [2022-11-21 16:23:36,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 174.96296296296296) internal successors, (4724), 27 states have internal predecessors, (4724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:36,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 272.0) internal successors, (7616), 28 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:36,748 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 272.0) internal successors, (7616), 28 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:36,749 INFO L175 Difference]: Start difference. First operand has 270 places, 260 transitions, 640 flow. Second operand 27 states and 4724 transitions. [2022-11-21 16:23:36,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 295 transitions, 1000 flow [2022-11-21 16:23:36,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 295 transitions, 987 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-21 16:23:36,759 INFO L231 Difference]: Finished difference. Result has 301 places, 282 transitions, 866 flow [2022-11-21 16:23:36,760 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=866, PETRI_PLACES=301, PETRI_TRANSITIONS=282} [2022-11-21 16:23:36,761 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, 49 predicate places. [2022-11-21 16:23:36,761 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 282 transitions, 866 flow [2022-11-21 16:23:36,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 171.92592592592592) internal successors, (4642), 27 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:36,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:36,763 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:36,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:23:36,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 889495684, now seen corresponding path program 1 times [2022-11-21 16:23:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:36,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181716835] [2022-11-21 16:23:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:36,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:38,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181716835] [2022-11-21 16:23:38,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181716835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:38,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:38,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-21 16:23:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813599983] [2022-11-21 16:23:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:23:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:23:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:23:38,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 272 [2022-11-21 16:23:38,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 282 transitions, 866 flow. Second operand has 18 states, 18 states have (on average 176.72222222222223) internal successors, (3181), 18 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:38,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:38,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 272 [2022-11-21 16:23:38,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:41,024 INFO L130 PetriNetUnfolder]: 1555/6501 cut-off events. [2022-11-21 16:23:41,024 INFO L131 PetriNetUnfolder]: For 421/425 co-relation queries the response was YES. [2022-11-21 16:23:41,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9784 conditions, 6501 events. 1555/6501 cut-off events. For 421/425 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 57302 event pairs, 723 based on Foata normal form. 3/6169 useless extension candidates. Maximal degree in co-relation 9758. Up to 2403 conditions per place. [2022-11-21 16:23:41,086 INFO L137 encePairwiseOnDemand]: 255/272 looper letters, 96 selfloop transitions, 24 changer transitions 0/289 dead transitions. [2022-11-21 16:23:41,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 289 transitions, 1126 flow [2022-11-21 16:23:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:23:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-21 16:23:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2707 transitions. [2022-11-21 16:23:41,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6634803921568627 [2022-11-21 16:23:41,094 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2707 transitions. [2022-11-21 16:23:41,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2707 transitions. [2022-11-21 16:23:41,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:41,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2707 transitions. [2022-11-21 16:23:41,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 180.46666666666667) internal successors, (2707), 15 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:41,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 272.0) internal successors, (4352), 16 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:41,110 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 272.0) internal successors, (4352), 16 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:41,110 INFO L175 Difference]: Start difference. First operand has 301 places, 282 transitions, 866 flow. Second operand 15 states and 2707 transitions. [2022-11-21 16:23:41,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 289 transitions, 1126 flow [2022-11-21 16:23:41,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 289 transitions, 1078 flow, removed 8 selfloop flow, removed 14 redundant places. [2022-11-21 16:23:41,120 INFO L231 Difference]: Finished difference. Result has 299 places, 279 transitions, 856 flow [2022-11-21 16:23:41,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=856, PETRI_PLACES=299, PETRI_TRANSITIONS=279} [2022-11-21 16:23:41,121 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, 47 predicate places. [2022-11-21 16:23:41,121 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 279 transitions, 856 flow [2022-11-21 16:23:41,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 176.72222222222223) internal successors, (3181), 18 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:41,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:41,123 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:41,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:23:41,123 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash -983440833, now seen corresponding path program 1 times [2022-11-21 16:23:41,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:41,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440146259] [2022-11-21 16:23:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:41,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:45,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440146259] [2022-11-21 16:23:45,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440146259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:45,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:45,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-11-21 16:23:45,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657223552] [2022-11-21 16:23:45,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:45,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:23:45,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:45,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:23:45,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:23:45,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 272 [2022-11-21 16:23:45,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 279 transitions, 856 flow. Second operand has 28 states, 28 states have (on average 163.14285714285714) internal successors, (4568), 28 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:45,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:45,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 272 [2022-11-21 16:23:45,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:49,354 INFO L130 PetriNetUnfolder]: 782/3181 cut-off events. [2022-11-21 16:23:49,354 INFO L131 PetriNetUnfolder]: For 336/339 co-relation queries the response was YES. [2022-11-21 16:23:49,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5052 conditions, 3181 events. 782/3181 cut-off events. For 336/339 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 22072 event pairs, 320 based on Foata normal form. 3/3026 useless extension candidates. Maximal degree in co-relation 5028. Up to 1081 conditions per place. [2022-11-21 16:23:49,377 INFO L137 encePairwiseOnDemand]: 244/272 looper letters, 114 selfloop transitions, 42 changer transitions 0/301 dead transitions. [2022-11-21 16:23:49,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 301 transitions, 1229 flow [2022-11-21 16:23:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 16:23:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-21 16:23:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4323 transitions. [2022-11-21 16:23:49,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6112839366515838 [2022-11-21 16:23:49,389 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4323 transitions. [2022-11-21 16:23:49,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4323 transitions. [2022-11-21 16:23:49,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:49,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4323 transitions. [2022-11-21 16:23:49,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 166.26923076923077) internal successors, (4323), 26 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:49,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 272.0) internal successors, (7344), 27 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:49,419 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 272.0) internal successors, (7344), 27 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:49,419 INFO L175 Difference]: Start difference. First operand has 299 places, 279 transitions, 856 flow. Second operand 26 states and 4323 transitions. [2022-11-21 16:23:49,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 301 transitions, 1229 flow [2022-11-21 16:23:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 301 transitions, 1163 flow, removed 1 selfloop flow, removed 21 redundant places. [2022-11-21 16:23:49,430 INFO L231 Difference]: Finished difference. Result has 296 places, 269 transitions, 852 flow [2022-11-21 16:23:49,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=852, PETRI_PLACES=296, PETRI_TRANSITIONS=269} [2022-11-21 16:23:49,431 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, 44 predicate places. [2022-11-21 16:23:49,432 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 269 transitions, 852 flow [2022-11-21 16:23:49,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 163.14285714285714) internal successors, (4568), 28 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:49,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:49,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:49,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:23:49,434 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash -868849620, now seen corresponding path program 1 times [2022-11-21 16:23:49,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:49,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696019368] [2022-11-21 16:23:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:49,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:49,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:49,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696019368] [2022-11-21 16:23:49,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696019368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:49,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:49,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:23:49,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758344766] [2022-11-21 16:23:49,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:49,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:23:49,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:49,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:23:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:23:49,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 272 [2022-11-21 16:23:49,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 269 transitions, 852 flow. Second operand has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:49,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:49,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 272 [2022-11-21 16:23:49,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:49,825 INFO L130 PetriNetUnfolder]: 60/879 cut-off events. [2022-11-21 16:23:49,825 INFO L131 PetriNetUnfolder]: For 132/133 co-relation queries the response was YES. [2022-11-21 16:23:49,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 879 events. 60/879 cut-off events. For 132/133 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 3380 event pairs, 9 based on Foata normal form. 10/855 useless extension candidates. Maximal degree in co-relation 1232. Up to 39 conditions per place. [2022-11-21 16:23:49,830 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 12 selfloop transitions, 6 changer transitions 0/271 dead transitions. [2022-11-21 16:23:49,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 271 transitions, 895 flow [2022-11-21 16:23:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:23:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:23:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 759 transitions. [2022-11-21 16:23:49,832 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9301470588235294 [2022-11-21 16:23:49,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 759 transitions. [2022-11-21 16:23:49,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 759 transitions. [2022-11-21 16:23:49,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:49,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 759 transitions. [2022-11-21 16:23:49,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:49,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:49,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:49,837 INFO L175 Difference]: Start difference. First operand has 296 places, 269 transitions, 852 flow. Second operand 3 states and 759 transitions. [2022-11-21 16:23:49,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 271 transitions, 895 flow [2022-11-21 16:23:49,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 271 transitions, 819 flow, removed 1 selfloop flow, removed 23 redundant places. [2022-11-21 16:23:49,845 INFO L231 Difference]: Finished difference. Result has 275 places, 269 transitions, 788 flow [2022-11-21 16:23:49,846 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=788, PETRI_PLACES=275, PETRI_TRANSITIONS=269} [2022-11-21 16:23:49,846 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, 23 predicate places. [2022-11-21 16:23:49,846 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 269 transitions, 788 flow [2022-11-21 16:23:49,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:49,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:49,847 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:49,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:23:49,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1364545998, now seen corresponding path program 1 times [2022-11-21 16:23:49,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:49,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634134254] [2022-11-21 16:23:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:49,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:52,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:52,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634134254] [2022-11-21 16:23:52,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634134254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:52,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:52,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-21 16:23:52,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087148266] [2022-11-21 16:23:52,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:52,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 16:23:52,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 16:23:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:23:52,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 272 [2022-11-21 16:23:52,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 269 transitions, 788 flow. Second operand has 29 states, 29 states have (on average 167.68965517241378) internal successors, (4863), 29 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:52,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:23:52,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 272 [2022-11-21 16:23:52,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:23:55,661 INFO L130 PetriNetUnfolder]: 327/1557 cut-off events. [2022-11-21 16:23:55,661 INFO L131 PetriNetUnfolder]: For 268/272 co-relation queries the response was YES. [2022-11-21 16:23:55,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2880 conditions, 1557 events. 327/1557 cut-off events. For 268/272 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7947 event pairs, 29 based on Foata normal form. 0/1504 useless extension candidates. Maximal degree in co-relation 2860. Up to 359 conditions per place. [2022-11-21 16:23:55,668 INFO L137 encePairwiseOnDemand]: 241/272 looper letters, 136 selfloop transitions, 44 changer transitions 0/325 dead transitions. [2022-11-21 16:23:55,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 325 transitions, 1325 flow [2022-11-21 16:23:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 16:23:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-21 16:23:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4778 transitions. [2022-11-21 16:23:55,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6273634453781513 [2022-11-21 16:23:55,675 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4778 transitions. [2022-11-21 16:23:55,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4778 transitions. [2022-11-21 16:23:55,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:23:55,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4778 transitions. [2022-11-21 16:23:55,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 170.64285714285714) internal successors, (4778), 28 states have internal predecessors, (4778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:55,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 272.0) internal successors, (7888), 29 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:55,698 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 272.0) internal successors, (7888), 29 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:55,698 INFO L175 Difference]: Start difference. First operand has 275 places, 269 transitions, 788 flow. Second operand 28 states and 4778 transitions. [2022-11-21 16:23:55,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 325 transitions, 1325 flow [2022-11-21 16:23:55,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 325 transitions, 1319 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:23:55,707 INFO L231 Difference]: Finished difference. Result has 306 places, 276 transitions, 915 flow [2022-11-21 16:23:55,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=915, PETRI_PLACES=306, PETRI_TRANSITIONS=276} [2022-11-21 16:23:55,708 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, 54 predicate places. [2022-11-21 16:23:55,709 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 276 transitions, 915 flow [2022-11-21 16:23:55,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 167.68965517241378) internal successors, (4863), 29 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:55,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:23:55,711 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:23:55,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:23:55,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:23:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1298194817, now seen corresponding path program 1 times [2022-11-21 16:23:55,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:55,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226951922] [2022-11-21 16:23:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:55,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:02,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:02,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226951922] [2022-11-21 16:24:02,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226951922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:24:02,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:24:02,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-11-21 16:24:02,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884411071] [2022-11-21 16:24:02,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:24:02,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 16:24:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:02,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 16:24:02,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 16:24:02,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 272 [2022-11-21 16:24:02,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 276 transitions, 915 flow. Second operand has 36 states, 36 states have (on average 154.5) internal successors, (5562), 36 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:02,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:24:02,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 272 [2022-11-21 16:24:02,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:24:08,378 INFO L130 PetriNetUnfolder]: 427/2033 cut-off events. [2022-11-21 16:24:08,378 INFO L131 PetriNetUnfolder]: For 546/550 co-relation queries the response was YES. [2022-11-21 16:24:08,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 2033 events. 427/2033 cut-off events. For 546/550 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 11181 event pairs, 37 based on Foata normal form. 0/1965 useless extension candidates. Maximal degree in co-relation 3852. Up to 376 conditions per place. [2022-11-21 16:24:08,391 INFO L137 encePairwiseOnDemand]: 231/272 looper letters, 175 selfloop transitions, 60 changer transitions 0/370 dead transitions. [2022-11-21 16:24:08,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 370 transitions, 1657 flow [2022-11-21 16:24:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-21 16:24:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-21 16:24:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5687 transitions. [2022-11-21 16:24:08,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5807802287581699 [2022-11-21 16:24:08,399 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5687 transitions. [2022-11-21 16:24:08,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5687 transitions. [2022-11-21 16:24:08,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:24:08,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5687 transitions. [2022-11-21 16:24:08,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 157.97222222222223) internal successors, (5687), 36 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:08,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 272.0) internal successors, (10064), 37 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:08,427 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 272.0) internal successors, (10064), 37 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:08,427 INFO L175 Difference]: Start difference. First operand has 306 places, 276 transitions, 915 flow. Second operand 36 states and 5687 transitions. [2022-11-21 16:24:08,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 370 transitions, 1657 flow [2022-11-21 16:24:08,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 370 transitions, 1585 flow, removed 0 selfloop flow, removed 21 redundant places. [2022-11-21 16:24:08,440 INFO L231 Difference]: Finished difference. Result has 327 places, 288 transitions, 1044 flow [2022-11-21 16:24:08,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1044, PETRI_PLACES=327, PETRI_TRANSITIONS=288} [2022-11-21 16:24:08,443 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, 75 predicate places. [2022-11-21 16:24:08,443 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 288 transitions, 1044 flow [2022-11-21 16:24:08,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 154.5) internal successors, (5562), 36 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:08,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:24:08,445 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:08,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:24:08,446 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:24:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash 396256198, now seen corresponding path program 1 times [2022-11-21 16:24:08,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:08,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112190279] [2022-11-21 16:24:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:08,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat