./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro --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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --- 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-8393723 [2022-11-18 18:33:25,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:33:25,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:33:25,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:33:25,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:33:25,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:33:25,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:33:25,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:33:25,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:33:25,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:33:25,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:33:25,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:33:25,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:33:25,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:33:25,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:33:25,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:33:25,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:33:25,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:33:25,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:33:25,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:33:25,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:33:25,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:33:25,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:33:25,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:33:25,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:33:25,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:33:25,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:33:25,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:33:25,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:33:25,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:33:25,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:33:25,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:33:25,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:33:25,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:33:25,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:33:25,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:33:25,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:33:25,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:33:25,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:33:25,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:33:25,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:33:25,807 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:33:25,832 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:33:25,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:33:25,832 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:33:25,833 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:33:25,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:33:25,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:33:25,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:33:25,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:33:25,835 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:33:25,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:33:25,835 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:33:25,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:33:25,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:33:25,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:33:25,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:33:25,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:33:25,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:33:25,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:33:25,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:33:25,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:33:25,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:33:25,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:33:25,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:33:25,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:33:25,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:33:25,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:33:25,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:33:25,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:33:25,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:33:25,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:33:25,839 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:33:25,840 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:33:25,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:33:25,840 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_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d [2022-11-18 18:33:26,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:33:26,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:33:26,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:33:26,152 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:33:26,153 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:33:26,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/queue_ok_longest.i [2022-11-18 18:33:26,259 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/data/96b7e14c3/5a5cdd7200b041e2b3508db27a520f10/FLAG8e9c834b7 [2022-11-18 18:33:26,988 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:33:26,989 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/sv-benchmarks/c/pthread/queue_ok_longest.i [2022-11-18 18:33:27,005 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/data/96b7e14c3/5a5cdd7200b041e2b3508db27a520f10/FLAG8e9c834b7 [2022-11-18 18:33:27,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/data/96b7e14c3/5a5cdd7200b041e2b3508db27a520f10 [2022-11-18 18:33:27,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:33:27,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:33:27,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:33:27,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:33:27,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:33:27,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:33:27" (1/1) ... [2022-11-18 18:33:27,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa6add1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:27, skipping insertion in model container [2022-11-18 18:33:27,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:33:27" (1/1) ... [2022-11-18 18:33:27,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:33:27,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:33:27,925 WARN L234 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_c27c0dd1-f9e5-428c-9570-fdf504030a9b/sv-benchmarks/c/pthread/queue_ok_longest.i[43280,43293] [2022-11-18 18:33:27,933 WARN L234 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_c27c0dd1-f9e5-428c-9570-fdf504030a9b/sv-benchmarks/c/pthread/queue_ok_longest.i[43553,43566] [2022-11-18 18:33:27,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:33:27,957 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:33:28,012 WARN L234 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_c27c0dd1-f9e5-428c-9570-fdf504030a9b/sv-benchmarks/c/pthread/queue_ok_longest.i[43280,43293] [2022-11-18 18:33:28,015 WARN L234 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_c27c0dd1-f9e5-428c-9570-fdf504030a9b/sv-benchmarks/c/pthread/queue_ok_longest.i[43553,43566] [2022-11-18 18:33:28,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:33:28,072 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:33:28,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28 WrapperNode [2022-11-18 18:33:28,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:33:28,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:33:28,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:33:28,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:33:28,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,133 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 202 [2022-11-18 18:33:28,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:33:28,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:33:28,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:33:28,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:33:28,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,169 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:33:28,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:33:28,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:33:28,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:33:28,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (1/1) ... [2022-11-18 18:33:28,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:33:28,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:28,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:33:28,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:33:28,300 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 18:33:28,300 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 18:33:28,300 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 18:33:28,302 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 18:33:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:33:28,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:33:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:33:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:33:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 18:33:28,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:33:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:33:28,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:33:28,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:33:28,307 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:33:28,546 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:33:28,560 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:33:29,003 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:33:29,015 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:33:29,015 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:33:29,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:33:29 BoogieIcfgContainer [2022-11-18 18:33:29,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:33:29,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:33:29,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:33:29,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:33:29,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:33:27" (1/3) ... [2022-11-18 18:33:29,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@296115e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:33:29, skipping insertion in model container [2022-11-18 18:33:29,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:33:28" (2/3) ... [2022-11-18 18:33:29,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@296115e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:33:29, skipping insertion in model container [2022-11-18 18:33:29,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:33:29" (3/3) ... [2022-11-18 18:33:29,030 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2022-11-18 18:33:29,041 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:33:29,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:33:29,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:33:29,054 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:33:29,162 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:33:29,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 229 transitions, 474 flow [2022-11-18 18:33:29,411 INFO L130 PetriNetUnfolder]: 13/227 cut-off events. [2022-11-18 18:33:29,412 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:33:29,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 227 events. 13/227 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 367 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2022-11-18 18:33:29,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 229 transitions, 474 flow [2022-11-18 18:33:29,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 217 transitions, 443 flow [2022-11-18 18:33:29,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:33:29,466 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;@2e5c1a9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:33:29,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-18 18:33:29,480 INFO L130 PetriNetUnfolder]: 1/62 cut-off events. [2022-11-18 18:33:29,481 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:33:29,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:29,484 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:29,485 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 2 more)] === [2022-11-18 18:33:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 57167261, now seen corresponding path program 1 times [2022-11-18 18:33:29,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226643180] [2022-11-18 18:33:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:29,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:29,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:29,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226643180] [2022-11-18 18:33:29,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226643180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:29,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:29,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:33:29,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453875908] [2022-11-18 18:33:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:29,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:33:29,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:33:29,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:33:29,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 229 [2022-11-18 18:33:29,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 217 transitions, 443 flow. Second operand has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:29,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:29,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 229 [2022-11-18 18:33:29,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:29,993 INFO L130 PetriNetUnfolder]: 9/208 cut-off events. [2022-11-18 18:33:29,994 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 18:33:30,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 208 events. 9/208 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 276 event pairs, 0 based on Foata normal form. 5/203 useless extension candidates. Maximal degree in co-relation 143. Up to 4 conditions per place. [2022-11-18 18:33:30,003 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 3 selfloop transitions, 0 changer transitions 0/208 dead transitions. [2022-11-18 18:33:30,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 208 transitions, 431 flow [2022-11-18 18:33:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:33:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:33:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 443 transitions. [2022-11-18 18:33:30,029 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9672489082969432 [2022-11-18 18:33:30,035 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 443 transitions. [2022-11-18 18:33:30,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 443 transitions. [2022-11-18 18:33:30,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:30,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 443 transitions. [2022-11-18 18:33:30,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:30,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:30,054 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:30,056 INFO L175 Difference]: Start difference. First operand has 211 places, 217 transitions, 443 flow. Second operand 2 states and 443 transitions. [2022-11-18 18:33:30,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 208 transitions, 431 flow [2022-11-18 18:33:30,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 208 transitions, 426 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:33:30,067 INFO L231 Difference]: Finished difference. Result has 204 places, 208 transitions, 420 flow [2022-11-18 18:33:30,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=420, PETRI_PLACES=204, PETRI_TRANSITIONS=208} [2022-11-18 18:33:30,074 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -7 predicate places. [2022-11-18 18:33:30,074 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 208 transitions, 420 flow [2022-11-18 18:33:30,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:30,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:30,076 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] [2022-11-18 18:33:30,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:33:30,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:33:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1723295190, now seen corresponding path program 1 times [2022-11-18 18:33:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:30,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945117466] [2022-11-18 18:33:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:31,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:31,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945117466] [2022-11-18 18:33:31,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945117466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:31,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:31,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:33:31,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121434297] [2022-11-18 18:33:31,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:31,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:33:31,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:33:31,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:33:31,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 229 [2022-11-18 18:33:31,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 208 transitions, 420 flow. Second operand has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:31,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 229 [2022-11-18 18:33:31,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:32,875 INFO L130 PetriNetUnfolder]: 611/2580 cut-off events. [2022-11-18 18:33:32,875 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-18 18:33:32,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3512 conditions, 2580 events. 611/2580 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 20587 event pairs, 459 based on Foata normal form. 0/2409 useless extension candidates. Maximal degree in co-relation 3509. Up to 882 conditions per place. [2022-11-18 18:33:32,895 INFO L137 encePairwiseOnDemand]: 216/229 looper letters, 42 selfloop transitions, 12 changer transitions 0/204 dead transitions. [2022-11-18 18:33:32,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 204 transitions, 520 flow [2022-11-18 18:33:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:33:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 18:33:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2187 transitions. [2022-11-18 18:33:32,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7346321800470272 [2022-11-18 18:33:32,905 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2187 transitions. [2022-11-18 18:33:32,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2187 transitions. [2022-11-18 18:33:32,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:32,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2187 transitions. [2022-11-18 18:33:32,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.23076923076923) internal successors, (2187), 13 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:32,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 229.0) internal successors, (3206), 14 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:32,928 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 229.0) internal successors, (3206), 14 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:32,928 INFO L175 Difference]: Start difference. First operand has 204 places, 208 transitions, 420 flow. Second operand 13 states and 2187 transitions. [2022-11-18 18:33:32,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 204 transitions, 520 flow [2022-11-18 18:33:32,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 204 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:33:32,941 INFO L231 Difference]: Finished difference. Result has 213 places, 204 transitions, 436 flow [2022-11-18 18:33:32,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=436, PETRI_PLACES=213, PETRI_TRANSITIONS=204} [2022-11-18 18:33:32,943 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 2 predicate places. [2022-11-18 18:33:32,943 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 204 transitions, 436 flow [2022-11-18 18:33:32,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:32,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:32,945 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] [2022-11-18 18:33:32,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:33:32,946 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:33:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1553437092, now seen corresponding path program 1 times [2022-11-18 18:33:32,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:32,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540057716] [2022-11-18 18:33:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:32,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:33,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:33,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540057716] [2022-11-18 18:33:33,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540057716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:33,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:33,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:33,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371159472] [2022-11-18 18:33:33,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:33,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:33,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:33,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 229 [2022-11-18 18:33:33,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 204 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:33,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 229 [2022-11-18 18:33:33,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:33,302 INFO L130 PetriNetUnfolder]: 16/305 cut-off events. [2022-11-18 18:33:33,302 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 18:33:33,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 305 events. 16/305 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 688 event pairs, 2 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 344. Up to 12 conditions per place. [2022-11-18 18:33:33,304 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 7 selfloop transitions, 2 changer transitions 5/207 dead transitions. [2022-11-18 18:33:33,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 207 transitions, 469 flow [2022-11-18 18:33:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:33:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2022-11-18 18:33:33,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9446870451237264 [2022-11-18 18:33:33,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2022-11-18 18:33:33,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2022-11-18 18:33:33,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:33,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2022-11-18 18:33:33,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,314 INFO L175 Difference]: Start difference. First operand has 213 places, 204 transitions, 436 flow. Second operand 3 states and 649 transitions. [2022-11-18 18:33:33,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 207 transitions, 469 flow [2022-11-18 18:33:33,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 207 transitions, 446 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-18 18:33:33,320 INFO L231 Difference]: Finished difference. Result has 205 places, 201 transitions, 415 flow [2022-11-18 18:33:33,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=205, PETRI_TRANSITIONS=201} [2022-11-18 18:33:33,321 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -6 predicate places. [2022-11-18 18:33:33,321 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 201 transitions, 415 flow [2022-11-18 18:33:33,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:33,323 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:33,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:33:33,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:33:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:33,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1135869843, now seen corresponding path program 1 times [2022-11-18 18:33:33,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686558018] [2022-11-18 18:33:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:33,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:33,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:33,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686558018] [2022-11-18 18:33:33,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686558018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:33,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:33,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:33,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575914662] [2022-11-18 18:33:33,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:33,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:33,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 229 [2022-11-18 18:33:33,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 201 transitions, 415 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:33,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 229 [2022-11-18 18:33:33,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:33,591 INFO L130 PetriNetUnfolder]: 20/334 cut-off events. [2022-11-18 18:33:33,591 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:33:33,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 334 events. 20/334 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 674 event pairs, 6 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 399. Up to 24 conditions per place. [2022-11-18 18:33:33,593 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 13 selfloop transitions, 2 changer transitions 1/206 dead transitions. [2022-11-18 18:33:33,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 206 transitions, 457 flow [2022-11-18 18:33:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:33:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2022-11-18 18:33:33,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9446870451237264 [2022-11-18 18:33:33,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2022-11-18 18:33:33,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2022-11-18 18:33:33,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:33,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2022-11-18 18:33:33,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,604 INFO L175 Difference]: Start difference. First operand has 205 places, 201 transitions, 415 flow. Second operand 3 states and 649 transitions. [2022-11-18 18:33:33,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 206 transitions, 457 flow [2022-11-18 18:33:33,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 206 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 18:33:33,611 INFO L231 Difference]: Finished difference. Result has 205 places, 201 transitions, 421 flow [2022-11-18 18:33:33,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=205, PETRI_TRANSITIONS=201} [2022-11-18 18:33:33,612 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -6 predicate places. [2022-11-18 18:33:33,612 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 201 transitions, 421 flow [2022-11-18 18:33:33,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,613 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:33,614 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] [2022-11-18 18:33:33,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:33:33,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:33:33,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:33,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1252901689, now seen corresponding path program 1 times [2022-11-18 18:33:33,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:33,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642399294] [2022-11-18 18:33:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:33,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:33,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:33,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642399294] [2022-11-18 18:33:33,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642399294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:33,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050285359] [2022-11-18 18:33:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:33,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:33,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:33,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:33,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:33:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:33:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:34,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:34,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050285359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:34,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:34,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:33:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287504472] [2022-11-18 18:33:34,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:34,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:33:34,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:33:34,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:33:34,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:33:34,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 201 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:34,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:33:34,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:34,458 INFO L130 PetriNetUnfolder]: 30/421 cut-off events. [2022-11-18 18:33:34,459 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 18:33:34,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 421 events. 30/421 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 693 event pairs, 4 based on Foata normal form. 4/414 useless extension candidates. Maximal degree in co-relation 535. Up to 19 conditions per place. [2022-11-18 18:33:34,461 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 20 selfloop transitions, 9 changer transitions 0/218 dead transitions. [2022-11-18 18:33:34,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 218 transitions, 529 flow [2022-11-18 18:33:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:33:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:33:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1921 transitions. [2022-11-18 18:33:34,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9320718098010674 [2022-11-18 18:33:34,467 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1921 transitions. [2022-11-18 18:33:34,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1921 transitions. [2022-11-18 18:33:34,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:34,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1921 transitions. [2022-11-18 18:33:34,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 213.44444444444446) internal successors, (1921), 9 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,479 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,480 INFO L175 Difference]: Start difference. First operand has 205 places, 201 transitions, 421 flow. Second operand 9 states and 1921 transitions. [2022-11-18 18:33:34,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 218 transitions, 529 flow [2022-11-18 18:33:34,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 218 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:34,486 INFO L231 Difference]: Finished difference. Result has 214 places, 207 transitions, 469 flow [2022-11-18 18:33:34,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=469, PETRI_PLACES=214, PETRI_TRANSITIONS=207} [2022-11-18 18:33:34,489 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 3 predicate places. [2022-11-18 18:33:34,490 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 207 transitions, 469 flow [2022-11-18 18:33:34,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:34,494 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:34,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:34,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:34,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:33:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash -185463623, now seen corresponding path program 2 times [2022-11-18 18:33:34,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:34,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978271913] [2022-11-18 18:33:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:34,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-18 18:33:34,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:34,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978271913] [2022-11-18 18:33:34,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978271913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:34,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:34,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:34,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927088778] [2022-11-18 18:33:34,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:34,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:34,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:35,004 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 229 [2022-11-18 18:33:35,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 207 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:35,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 229 [2022-11-18 18:33:35,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:35,174 INFO L130 PetriNetUnfolder]: 25/609 cut-off events. [2022-11-18 18:33:35,174 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-18 18:33:35,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 609 events. 25/609 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1303 event pairs, 3 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 723. Up to 19 conditions per place. [2022-11-18 18:33:35,177 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 12 selfloop transitions, 3 changer transitions 3/209 dead transitions. [2022-11-18 18:33:35,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 209 transitions, 508 flow [2022-11-18 18:33:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:33:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2022-11-18 18:33:35,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9301310043668122 [2022-11-18 18:33:35,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2022-11-18 18:33:35,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2022-11-18 18:33:35,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:35,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2022-11-18 18:33:35,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,185 INFO L175 Difference]: Start difference. First operand has 214 places, 207 transitions, 469 flow. Second operand 3 states and 639 transitions. [2022-11-18 18:33:35,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 209 transitions, 508 flow [2022-11-18 18:33:35,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 209 transitions, 502 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:35,193 INFO L231 Difference]: Finished difference. Result has 215 places, 204 transitions, 463 flow [2022-11-18 18:33:35,194 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=463, PETRI_PLACES=215, PETRI_TRANSITIONS=204} [2022-11-18 18:33:35,196 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 4 predicate places. [2022-11-18 18:33:35,196 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 204 transitions, 463 flow [2022-11-18 18:33:35,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:35,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:35,197 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:35,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:33:35,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:33:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:35,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1279925599, now seen corresponding path program 1 times [2022-11-18 18:33:35,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:35,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35838542] [2022-11-18 18:33:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:35,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:35,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35838542] [2022-11-18 18:33:35,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35838542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:35,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119837811] [2022-11-18 18:33:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:35,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:35,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:35,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:35,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:33:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:33:35,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:36,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:36,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119837811] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:36,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:36,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:33:36,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671724656] [2022-11-18 18:33:36,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:36,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:33:36,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:36,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:33:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:33:36,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:33:36,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 204 transitions, 463 flow. Second operand has 18 states, 18 states have (on average 212.33333333333334) internal successors, (3822), 18 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:36,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:33:36,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:36,890 INFO L130 PetriNetUnfolder]: 58/745 cut-off events. [2022-11-18 18:33:36,890 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-18 18:33:36,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 745 events. 58/745 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1394 event pairs, 4 based on Foata normal form. 8/734 useless extension candidates. Maximal degree in co-relation 1045. Up to 39 conditions per place. [2022-11-18 18:33:36,895 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 40 selfloop transitions, 21 changer transitions 1/247 dead transitions. [2022-11-18 18:33:36,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 247 transitions, 761 flow [2022-11-18 18:33:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:33:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:33:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4475 transitions. [2022-11-18 18:33:36,907 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9305468912455812 [2022-11-18 18:33:36,907 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4475 transitions. [2022-11-18 18:33:36,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4475 transitions. [2022-11-18 18:33:36,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:36,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4475 transitions. [2022-11-18 18:33:36,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 213.0952380952381) internal successors, (4475), 21 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 229.0) internal successors, (5038), 22 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,935 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 229.0) internal successors, (5038), 22 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,935 INFO L175 Difference]: Start difference. First operand has 215 places, 204 transitions, 463 flow. Second operand 21 states and 4475 transitions. [2022-11-18 18:33:36,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 247 transitions, 761 flow [2022-11-18 18:33:36,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 247 transitions, 758 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:36,943 INFO L231 Difference]: Finished difference. Result has 236 places, 216 transitions, 588 flow [2022-11-18 18:33:36,943 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=588, PETRI_PLACES=236, PETRI_TRANSITIONS=216} [2022-11-18 18:33:36,944 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 25 predicate places. [2022-11-18 18:33:36,944 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 216 transitions, 588 flow [2022-11-18 18:33:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 212.33333333333334) internal successors, (3822), 18 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:36,947 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:36,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:37,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:33:37,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:33:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:37,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1142080485, now seen corresponding path program 2 times [2022-11-18 18:33:37,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:37,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231062739] [2022-11-18 18:33:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:37,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:38,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231062739] [2022-11-18 18:33:38,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231062739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703010893] [2022-11-18 18:33:38,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:33:38,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:38,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:38,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:38,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:33:38,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:33:38,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:33:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:33:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:39,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:39,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703010893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:39,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:39,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:33:39,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413443619] [2022-11-18 18:33:39,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:39,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:33:39,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:33:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:33:39,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:33:39,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 216 transitions, 588 flow. Second operand has 34 states, 34 states have (on average 212.41176470588235) internal successors, (7222), 34 states have internal predecessors, (7222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:39,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:39,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:33:39,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:41,074 INFO L130 PetriNetUnfolder]: 114/1391 cut-off events. [2022-11-18 18:33:41,075 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-11-18 18:33:41,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1391 events. 114/1391 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2838 event pairs, 4 based on Foata normal form. 16/1372 useless extension candidates. Maximal degree in co-relation 2153. Up to 79 conditions per place. [2022-11-18 18:33:41,084 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 80 selfloop transitions, 45 changer transitions 0/310 dead transitions. [2022-11-18 18:33:41,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 310 transitions, 1326 flow [2022-11-18 18:33:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:33:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:33:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 9583 transitions. [2022-11-18 18:33:41,139 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9299369238233867 [2022-11-18 18:33:41,139 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 9583 transitions. [2022-11-18 18:33:41,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 9583 transitions. [2022-11-18 18:33:41,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:41,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 9583 transitions. [2022-11-18 18:33:41,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 212.95555555555555) internal successors, (9583), 45 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:41,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 229.0) internal successors, (10534), 46 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:41,192 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 229.0) internal successors, (10534), 46 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:41,192 INFO L175 Difference]: Start difference. First operand has 236 places, 216 transitions, 588 flow. Second operand 45 states and 9583 transitions. [2022-11-18 18:33:41,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 310 transitions, 1326 flow [2022-11-18 18:33:41,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 310 transitions, 1286 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:33:41,203 INFO L231 Difference]: Finished difference. Result has 282 places, 241 transitions, 866 flow [2022-11-18 18:33:41,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=866, PETRI_PLACES=282, PETRI_TRANSITIONS=241} [2022-11-18 18:33:41,204 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 71 predicate places. [2022-11-18 18:33:41,204 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 241 transitions, 866 flow [2022-11-18 18:33:41,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 212.41176470588235) internal successors, (7222), 34 states have internal predecessors, (7222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:41,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:41,208 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:41,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:41,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:41,417 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:33:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:41,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1778850809, now seen corresponding path program 3 times [2022-11-18 18:33:41,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:41,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450129716] [2022-11-18 18:33:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:41,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 0 proven. 3270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:44,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:44,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450129716] [2022-11-18 18:33:44,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450129716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:44,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911884094] [2022-11-18 18:33:44,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:33:44,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:44,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:44,348 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:44,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:33:44,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 18:33:44,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:33:44,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 18:33:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:48,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 18:33:48,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:33:48,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:33:48,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:33:48,898 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-18 18:33:48,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-18 18:33:48,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:33:48,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 18:33:49,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 18:33:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 455 proven. 319 refuted. 0 times theorem prover too weak. 2496 trivial. 0 not checked. [2022-11-18 18:33:49,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:49,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:33:49,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-18 18:33:49,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:33:49,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-18 18:33:49,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-18 18:33:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 455 proven. 319 refuted. 0 times theorem prover too weak. 2496 trivial. 0 not checked. [2022-11-18 18:33:50,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911884094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:50,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:50,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14, 12] total 55 [2022-11-18 18:33:50,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723941920] [2022-11-18 18:33:50,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:50,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 18:33:50,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:50,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 18:33:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2574, Unknown=7, NotChecked=0, Total=2970 [2022-11-18 18:33:50,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 229 [2022-11-18 18:33:50,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 241 transitions, 866 flow. Second operand has 55 states, 55 states have (on average 164.74545454545455) internal successors, (9061), 55 states have internal predecessors, (9061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:50,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:50,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 229 [2022-11-18 18:33:50,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:07,823 INFO L130 PetriNetUnfolder]: 2125/7556 cut-off events. [2022-11-18 18:34:07,823 INFO L131 PetriNetUnfolder]: For 2828/2828 co-relation queries the response was YES. [2022-11-18 18:34:07,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15817 conditions, 7556 events. 2125/7556 cut-off events. For 2828/2828 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 40106 event pairs, 31 based on Foata normal form. 8/7464 useless extension candidates. Maximal degree in co-relation 15794. Up to 687 conditions per place. [2022-11-18 18:34:07,887 INFO L137 encePairwiseOnDemand]: 206/229 looper letters, 871 selfloop transitions, 374 changer transitions 0/1377 dead transitions. [2022-11-18 18:34:07,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1377 transitions, 6630 flow [2022-11-18 18:34:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-11-18 18:34:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2022-11-18 18:34:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 30167 transitions. [2022-11-18 18:34:07,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7159436111638504 [2022-11-18 18:34:07,953 INFO L72 ComplementDD]: Start complementDD. Operand 184 states and 30167 transitions. [2022-11-18 18:34:07,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 184 states and 30167 transitions. [2022-11-18 18:34:07,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:07,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 184 states and 30167 transitions. [2022-11-18 18:34:08,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 185 states, 184 states have (on average 163.95108695652175) internal successors, (30167), 184 states have internal predecessors, (30167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:08,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 185 states, 185 states have (on average 229.0) internal successors, (42365), 185 states have internal predecessors, (42365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:08,138 INFO L81 ComplementDD]: Finished complementDD. Result has 185 states, 185 states have (on average 229.0) internal successors, (42365), 185 states have internal predecessors, (42365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:08,138 INFO L175 Difference]: Start difference. First operand has 282 places, 241 transitions, 866 flow. Second operand 184 states and 30167 transitions. [2022-11-18 18:34:08,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1377 transitions, 6630 flow [2022-11-18 18:34:08,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1377 transitions, 6515 flow, removed 22 selfloop flow, removed 18 redundant places. [2022-11-18 18:34:08,185 INFO L231 Difference]: Finished difference. Result has 516 places, 646 transitions, 3382 flow [2022-11-18 18:34:08,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=184, PETRI_FLOW=3382, PETRI_PLACES=516, PETRI_TRANSITIONS=646} [2022-11-18 18:34:08,187 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 305 predicate places. [2022-11-18 18:34:08,187 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 646 transitions, 3382 flow [2022-11-18 18:34:08,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 164.74545454545455) internal successors, (9061), 55 states have internal predecessors, (9061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:08,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:08,191 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:08,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:08,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:08,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:34:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:08,401 INFO L85 PathProgramCache]: Analyzing trace with hash -426103930, now seen corresponding path program 1 times [2022-11-18 18:34:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:08,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303246456] [2022-11-18 18:34:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:08,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:11,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:11,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303246456] [2022-11-18 18:34:11,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303246456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:11,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381098501] [2022-11-18 18:34:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:11,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:11,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:11,817 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:11,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:34:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:12,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:34:12,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:13,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:15,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381098501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:15,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:15,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2022-11-18 18:34:15,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199780762] [2022-11-18 18:34:15,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:15,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-18 18:34:15,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:15,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-18 18:34:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2022-11-18 18:34:15,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:34:15,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 646 transitions, 3382 flow. Second operand has 70 states, 70 states have (on average 212.4857142857143) internal successors, (14874), 70 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:15,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:15,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:34:15,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:23,856 INFO L130 PetriNetUnfolder]: 927/8253 cut-off events. [2022-11-18 18:34:23,857 INFO L131 PetriNetUnfolder]: For 115970/115970 co-relation queries the response was YES. [2022-11-18 18:34:23,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26430 conditions, 8253 events. 927/8253 cut-off events. For 115970/115970 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 37394 event pairs, 7 based on Foata normal form. 102/8347 useless extension candidates. Maximal degree in co-relation 26337. Up to 590 conditions per place. [2022-11-18 18:34:23,951 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 170 selfloop transitions, 162 changer transitions 0/871 dead transitions. [2022-11-18 18:34:23,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 871 transitions, 5718 flow [2022-11-18 18:34:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-18 18:34:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-11-18 18:34:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 21076 transitions. [2022-11-18 18:34:23,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9296458030082484 [2022-11-18 18:34:23,974 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 21076 transitions. [2022-11-18 18:34:23,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 21076 transitions. [2022-11-18 18:34:23,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:23,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 21076 transitions. [2022-11-18 18:34:24,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 212.88888888888889) internal successors, (21076), 99 states have internal predecessors, (21076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:24,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 229.0) internal successors, (22900), 100 states have internal predecessors, (22900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:24,100 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 229.0) internal successors, (22900), 100 states have internal predecessors, (22900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:24,100 INFO L175 Difference]: Start difference. First operand has 516 places, 646 transitions, 3382 flow. Second operand 99 states and 21076 transitions. [2022-11-18 18:34:24,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 871 transitions, 5718 flow [2022-11-18 18:34:24,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 871 transitions, 5532 flow, removed 4 selfloop flow, removed 48 redundant places. [2022-11-18 18:34:24,473 INFO L231 Difference]: Finished difference. Result has 584 places, 713 transitions, 4466 flow [2022-11-18 18:34:24,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=3196, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=4466, PETRI_PLACES=584, PETRI_TRANSITIONS=713} [2022-11-18 18:34:24,475 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 373 predicate places. [2022-11-18 18:34:24,475 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 713 transitions, 4466 flow [2022-11-18 18:34:24,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 212.4857142857143) internal successors, (14874), 70 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:24,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:24,480 INFO L209 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:24,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:24,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:34:24,688 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:34:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1076181397, now seen corresponding path program 2 times [2022-11-18 18:34:24,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:24,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63579368] [2022-11-18 18:34:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:24,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:34,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63579368] [2022-11-18 18:34:34,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63579368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571180690] [2022-11-18 18:34:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:34:34,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:34,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:34,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:34,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:34:35,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:34:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:34:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2505 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-18 18:34:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:37,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:42,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571180690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:42,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:42,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 138 [2022-11-18 18:34:42,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945122100] [2022-11-18 18:34:42,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:42,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-11-18 18:34:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-11-18 18:34:42,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4830, Invalid=14076, Unknown=0, NotChecked=0, Total=18906 [2022-11-18 18:34:42,655 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:34:42,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 713 transitions, 4466 flow. Second operand has 138 states, 138 states have (on average 212.47826086956522) internal successors, (29322), 138 states have internal predecessors, (29322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:42,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:42,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:34:42,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:11,500 INFO L130 PetriNetUnfolder]: 1811/16515 cut-off events. [2022-11-18 18:35:11,500 INFO L131 PetriNetUnfolder]: For 328970/328970 co-relation queries the response was YES. [2022-11-18 18:35:11,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55495 conditions, 16515 events. 1811/16515 cut-off events. For 328970/328970 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 75719 event pairs, 7 based on Foata normal form. 204/16711 useless extension candidates. Maximal degree in co-relation 55385. Up to 1474 conditions per place. [2022-11-18 18:35:11,667 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 340 selfloop transitions, 298 changer transitions 0/1177 dead transitions. [2022-11-18 18:35:11,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 1177 transitions, 9846 flow [2022-11-18 18:35:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-11-18 18:35:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2022-11-18 18:35:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 42785 transitions. [2022-11-18 18:35:11,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.929522692215777 [2022-11-18 18:35:11,706 INFO L72 ComplementDD]: Start complementDD. Operand 201 states and 42785 transitions. [2022-11-18 18:35:11,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 201 states and 42785 transitions. [2022-11-18 18:35:11,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:11,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 201 states and 42785 transitions. [2022-11-18 18:35:11,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 202 states, 201 states have (on average 212.86069651741295) internal successors, (42785), 201 states have internal predecessors, (42785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:11,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:11,827 INFO L81 ComplementDD]: Finished complementDD. Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:11,827 INFO L175 Difference]: Start difference. First operand has 584 places, 713 transitions, 4466 flow. Second operand 201 states and 42785 transitions. [2022-11-18 18:35:11,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 1177 transitions, 9846 flow [2022-11-18 18:35:12,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 1177 transitions, 9236 flow, removed 208 selfloop flow, removed 48 redundant places. [2022-11-18 18:35:12,557 INFO L231 Difference]: Finished difference. Result has 771 places, 850 transitions, 6794 flow [2022-11-18 18:35:12,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=201, PETRI_FLOW=6794, PETRI_PLACES=771, PETRI_TRANSITIONS=850} [2022-11-18 18:35:12,558 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 560 predicate places. [2022-11-18 18:35:12,558 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 850 transitions, 6794 flow [2022-11-18 18:35:12,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 212.47826086956522) internal successors, (29322), 138 states have internal predecessors, (29322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:12,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:12,562 INFO L209 CegarLoopForPetriNet]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:12,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:12,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:12,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:35:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1623998944, now seen corresponding path program 3 times [2022-11-18 18:35:12,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:12,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445620841] [2022-11-18 18:35:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:52,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445620841] [2022-11-18 18:35:52,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445620841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:52,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319153084] [2022-11-18 18:35:52,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:35:52,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:52,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:52,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:52,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27c0dd1-f9e5-428c-9570-fdf504030a9b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:35:53,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 18:35:53,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:35:53,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:35:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:25,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 18:36:26,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:26,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:36:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:36:26,555 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-18 18:36:26,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-18 18:36:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:26,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 18:36:27,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-11-18 18:36:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:27,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:36:27,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:36:27,854 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:36:27,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 27 [2022-11-18 18:36:27,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:36:27,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 18:36:27,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 18:36:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 4139 proven. 1521 refuted. 0 times theorem prover too weak. 62816 trivial. 0 not checked. [2022-11-18 18:36:28,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:27,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:37:27,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 85 [2022-11-18 18:37:27,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:37:27,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 133 [2022-11-18 18:37:27,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-11-18 18:37:27,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-11-18 18:37:27,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-18 18:37:27,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:37:27,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 71 [2022-11-18 18:37:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 2519 proven. 1529 refuted. 1612 times theorem prover too weak. 62816 trivial. 0 not checked. [2022-11-18 18:37:51,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319153084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:51,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:51,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 19, 21] total 173 [2022-11-18 18:37:51,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709090845] [2022-11-18 18:37:51,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:51,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-11-18 18:37:51,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-11-18 18:37:51,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4997, Invalid=24676, Unknown=83, NotChecked=0, Total=29756 [2022-11-18 18:37:51,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 229 [2022-11-18 18:37:51,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 850 transitions, 6794 flow. Second operand has 173 states, 173 states have (on average 163.64161849710982) internal successors, (28310), 173 states have internal predecessors, (28310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:51,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:51,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 229 [2022-11-18 18:37:51,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand