./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8 --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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- 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-e04fb08 [2022-11-16 11:22:21,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:22:21,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:22:21,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:22:21,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:22:21,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:22:21,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:22:21,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:22:21,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:22:21,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:22:21,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:22:21,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:22:21,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:22:21,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:22:21,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:22:21,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:22:21,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:22:21,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:22:21,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:22:21,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:22:21,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:22:21,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:22:21,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:22:21,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:22:21,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:22:21,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:22:21,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:22:21,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:22:21,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:22:21,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:22:21,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:22:21,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:22:21,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:22:21,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:22:21,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:22:21,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:22:21,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:22:21,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:22:21,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:22:22,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:22:22,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:22:22,002 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:22:22,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:22:22,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:22:22,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:22:22,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:22:22,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:22:22,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:22:22,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:22:22,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:22:22,026 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:22:22,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:22:22,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:22:22,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:22:22,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:22:22,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:22:22,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:22:22,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:22:22,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:22:22,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:22:22,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:22:22,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:22:22,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:22:22,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:22:22,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:22:22,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:22:22,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:22:22,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:22:22,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:22:22,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:22:22,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:22:22,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:22:22,031 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:22:22,032 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:22:22,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:22:22,032 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_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-11-16 11:22:22,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:22:22,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:22:22,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:22:22,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:22:22,330 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:22:22,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-16 11:22:22,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/data/2375b26c8/cce6969efeae4472ad7a14e377d81c6f/FLAG6602faf07 [2022-11-16 11:22:22,840 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:22:22,841 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-16 11:22:22,848 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/data/2375b26c8/cce6969efeae4472ad7a14e377d81c6f/FLAG6602faf07 [2022-11-16 11:22:23,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/data/2375b26c8/cce6969efeae4472ad7a14e377d81c6f [2022-11-16 11:22:23,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:22:23,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:22:23,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:22:23,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:22:23,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:22:23,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22b92af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23, skipping insertion in model container [2022-11-16 11:22:23,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:22:23,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:22:23,447 WARN L229 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_8d0b8c21-0512-49c1-a539-ef5694ee3309/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-16 11:22:23,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:22:23,457 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:22:23,474 WARN L229 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_8d0b8c21-0512-49c1-a539-ef5694ee3309/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-16 11:22:23,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:22:23,488 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:22:23,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23 WrapperNode [2022-11-16 11:22:23,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:22:23,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:22:23,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:22:23,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:22:23,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,551 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-11-16 11:22:23,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:22:23,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:22:23,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:22:23,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:22:23,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,599 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:22:23,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:22:23,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:22:23,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:22:23,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (1/1) ... [2022-11-16 11:22:23,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:22:23,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:22:23,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:22:23,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:22:23,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:22:23,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:22:23,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:22:23,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:22:23,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:22:23,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:22:23,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:22:23,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:22:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:22:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:22:23,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:22:23,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:22:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:22:23,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:22:23,721 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:22:23,833 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:22:23,835 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:22:24,011 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:22:24,090 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:22:24,090 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:22:24,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:22:24 BoogieIcfgContainer [2022-11-16 11:22:24,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:22:24,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:22:24,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:22:24,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:22:24,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:22:23" (1/3) ... [2022-11-16 11:22:24,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fd9832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:22:24, skipping insertion in model container [2022-11-16 11:22:24,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:22:23" (2/3) ... [2022-11-16 11:22:24,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fd9832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:22:24, skipping insertion in model container [2022-11-16 11:22:24,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:22:24" (3/3) ... [2022-11-16 11:22:24,108 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-11-16 11:22:24,119 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:22:24,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:22:24,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:22:24,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:22:24,196 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:22:24,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2022-11-16 11:22:24,289 INFO L130 PetriNetUnfolder]: 6/84 cut-off events. [2022-11-16 11:22:24,289 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:22:24,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-16 11:22:24,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2022-11-16 11:22:24,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2022-11-16 11:22:24,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:22:24,332 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;@448b2776, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:22:24,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:22:24,389 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2022-11-16 11:22:24,389 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:22:24,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:22:24,392 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:24,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:22:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 975642243, now seen corresponding path program 1 times [2022-11-16 11:22:24,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:24,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409718832] [2022-11-16 11:22:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:24,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:24,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:24,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409718832] [2022-11-16 11:22:24,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409718832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:24,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:24,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:22:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495326160] [2022-11-16 11:22:24,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:24,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:22:24,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:22:24,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:22:24,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2022-11-16 11:22:24,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:24,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:22:24,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2022-11-16 11:22:24,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:22:24,917 INFO L130 PetriNetUnfolder]: 10/97 cut-off events. [2022-11-16 11:22:24,917 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-11-16 11:22:24,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-11-16 11:22:24,919 INFO L137 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2022-11-16 11:22:24,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2022-11-16 11:22:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:22:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:22:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2022-11-16 11:22:24,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2022-11-16 11:22:24,940 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2022-11-16 11:22:24,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2022-11-16 11:22:24,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:22:24,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2022-11-16 11:22:24,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:24,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:24,958 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:24,960 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2022-11-16 11:22:24,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2022-11-16 11:22:24,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:22:24,968 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2022-11-16 11:22:24,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-11-16 11:22:24,982 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-11-16 11:22:24,983 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2022-11-16 11:22:24,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:24,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:22:24,983 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:24,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:22:24,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:22:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:24,986 INFO L85 PathProgramCache]: Analyzing trace with hash -707015589, now seen corresponding path program 1 times [2022-11-16 11:22:24,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:24,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626387950] [2022-11-16 11:22:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:25,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:25,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626387950] [2022-11-16 11:22:25,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626387950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:25,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:25,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:22:25,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165172272] [2022-11-16 11:22:25,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:25,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:22:25,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:22:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:22:25,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 86 [2022-11-16 11:22:25,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:25,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:22:25,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 86 [2022-11-16 11:22:25,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:22:25,741 INFO L130 PetriNetUnfolder]: 62/188 cut-off events. [2022-11-16 11:22:25,741 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-16 11:22:25,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 188 events. 62/188 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 544 event pairs, 26 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 326. Up to 80 conditions per place. [2022-11-16 11:22:25,743 INFO L137 encePairwiseOnDemand]: 80/86 looper letters, 28 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2022-11-16 11:22:25,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 225 flow [2022-11-16 11:22:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:22:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:22:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2022-11-16 11:22:25,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2022-11-16 11:22:25,748 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 358 transitions. [2022-11-16 11:22:25,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 358 transitions. [2022-11-16 11:22:25,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:22:25,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 358 transitions. [2022-11-16 11:22:25,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:25,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:25,754 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:25,754 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 358 transitions. [2022-11-16 11:22:25,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 225 flow [2022-11-16 11:22:25,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:22:25,757 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2022-11-16 11:22:25,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-11-16 11:22:25,759 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2022-11-16 11:22:25,759 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2022-11-16 11:22:25,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:25,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:22:25,760 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:25,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:22:25,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:22:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:25,761 INFO L85 PathProgramCache]: Analyzing trace with hash 31782083, now seen corresponding path program 1 times [2022-11-16 11:22:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:25,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459993689] [2022-11-16 11:22:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:25,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:26,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:26,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459993689] [2022-11-16 11:22:26,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459993689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:26,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:26,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:22:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94387781] [2022-11-16 11:22:26,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:26,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:22:26,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:22:26,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:22:26,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2022-11-16 11:22:26,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:26,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:22:26,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2022-11-16 11:22:26,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:22:26,213 INFO L130 PetriNetUnfolder]: 44/170 cut-off events. [2022-11-16 11:22:26,213 INFO L131 PetriNetUnfolder]: For 16/22 co-relation queries the response was YES. [2022-11-16 11:22:26,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 170 events. 44/170 cut-off events. For 16/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 522 event pairs, 23 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 297. Up to 70 conditions per place. [2022-11-16 11:22:26,219 INFO L137 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2022-11-16 11:22:26,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 233 flow [2022-11-16 11:22:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:22:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:22:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2022-11-16 11:22:26,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2022-11-16 11:22:26,229 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2022-11-16 11:22:26,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2022-11-16 11:22:26,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:22:26,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2022-11-16 11:22:26,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:26,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:26,237 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:26,238 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 6 states and 366 transitions. [2022-11-16 11:22:26,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 233 flow [2022-11-16 11:22:26,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 225 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:22:26,243 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 170 flow [2022-11-16 11:22:26,244 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-11-16 11:22:26,246 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2022-11-16 11:22:26,246 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 170 flow [2022-11-16 11:22:26,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:26,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:22:26,247 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] [2022-11-16 11:22:26,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:22:26,248 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:22:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1873075449, now seen corresponding path program 1 times [2022-11-16 11:22:26,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:26,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653452264] [2022-11-16 11:22:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:26,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:26,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653452264] [2022-11-16 11:22:26,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653452264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:22:26,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179827804] [2022-11-16 11:22:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:26,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:26,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:22:26,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:22:27,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:22:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:22:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:27,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:28,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179827804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:28,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:22:28,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:22:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701727647] [2022-11-16 11:22:28,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:28,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:22:28,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:22:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:22:28,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:22:28,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 170 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:28,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:22:28,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:22:28,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:22:31,591 INFO L130 PetriNetUnfolder]: 258/823 cut-off events. [2022-11-16 11:22:31,591 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-11-16 11:22:31,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 823 events. 258/823 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4942 event pairs, 2 based on Foata normal form. 4/826 useless extension candidates. Maximal degree in co-relation 1753. Up to 155 conditions per place. [2022-11-16 11:22:31,597 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 134 selfloop transitions, 117 changer transitions 49/341 dead transitions. [2022-11-16 11:22:31,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 341 transitions, 1630 flow [2022-11-16 11:22:31,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 11:22:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-16 11:22:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3541 transitions. [2022-11-16 11:22:31,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6433502906976745 [2022-11-16 11:22:31,607 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3541 transitions. [2022-11-16 11:22:31,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3541 transitions. [2022-11-16 11:22:31,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:22:31,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3541 transitions. [2022-11-16 11:22:31,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.328125) internal successors, (3541), 64 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:31,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:31,632 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:31,632 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 170 flow. Second operand 64 states and 3541 transitions. [2022-11-16 11:22:31,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 341 transitions, 1630 flow [2022-11-16 11:22:31,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 341 transitions, 1580 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:22:31,640 INFO L231 Difference]: Finished difference. Result has 168 places, 202 transitions, 991 flow [2022-11-16 11:22:31,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=991, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2022-11-16 11:22:31,642 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2022-11-16 11:22:31,642 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 991 flow [2022-11-16 11:22:31,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:31,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:22:31,643 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] [2022-11-16 11:22:31,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:22:31,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:31,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:22:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:31,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1569915595, now seen corresponding path program 2 times [2022-11-16 11:22:31,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:31,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596029413] [2022-11-16 11:22:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:31,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:32,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:32,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596029413] [2022-11-16 11:22:32,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596029413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:22:32,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477647487] [2022-11-16 11:22:32,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:32,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:32,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:22:32,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:22:32,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:22:32,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:22:32,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:22:32,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:32,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:33,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477647487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:33,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:22:33,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-16 11:22:33,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905484345] [2022-11-16 11:22:33,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:33,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:22:33,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:33,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:22:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:22:33,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:22:33,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 991 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:33,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:22:33,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:22:33,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:22:38,754 INFO L130 PetriNetUnfolder]: 452/1595 cut-off events. [2022-11-16 11:22:38,755 INFO L131 PetriNetUnfolder]: For 3905/3905 co-relation queries the response was YES. [2022-11-16 11:22:38,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5259 conditions, 1595 events. 452/1595 cut-off events. For 3905/3905 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12083 event pairs, 43 based on Foata normal form. 9/1599 useless extension candidates. Maximal degree in co-relation 5223. Up to 381 conditions per place. [2022-11-16 11:22:38,806 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 227 selfloop transitions, 266 changer transitions 56/590 dead transitions. [2022-11-16 11:22:38,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 590 transitions, 4581 flow [2022-11-16 11:22:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-16 11:22:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-11-16 11:22:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4757 transitions. [2022-11-16 11:22:38,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6357925688318632 [2022-11-16 11:22:38,819 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4757 transitions. [2022-11-16 11:22:38,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4757 transitions. [2022-11-16 11:22:38,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:22:38,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4757 transitions. [2022-11-16 11:22:38,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 54.67816091954023) internal successors, (4757), 87 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:38,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:38,860 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:38,861 INFO L175 Difference]: Start difference. First operand has 168 places, 202 transitions, 991 flow. Second operand 87 states and 4757 transitions. [2022-11-16 11:22:38,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 590 transitions, 4581 flow [2022-11-16 11:22:38,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 590 transitions, 4047 flow, removed 248 selfloop flow, removed 16 redundant places. [2022-11-16 11:22:38,914 INFO L231 Difference]: Finished difference. Result has 269 places, 428 transitions, 3374 flow [2022-11-16 11:22:38,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=3374, PETRI_PLACES=269, PETRI_TRANSITIONS=428} [2022-11-16 11:22:38,917 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 193 predicate places. [2022-11-16 11:22:38,917 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 428 transitions, 3374 flow [2022-11-16 11:22:38,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:38,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:22:38,919 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] [2022-11-16 11:22:38,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:39,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:39,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:22:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1618685851, now seen corresponding path program 3 times [2022-11-16 11:22:39,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:39,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284302206] [2022-11-16 11:22:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:39,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:39,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:39,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284302206] [2022-11-16 11:22:39,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284302206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:22:39,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404777184] [2022-11-16 11:22:39,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:22:39,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:39,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:22:39,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:22:39,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:22:39,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:22:39,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:39,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:22:39,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:40,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:40,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404777184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:40,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:22:40,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:22:40,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238562524] [2022-11-16 11:22:40,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:40,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:22:40,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:22:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:22:40,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:22:40,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 428 transitions, 3374 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:40,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:22:40,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:22:40,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:22:45,642 INFO L130 PetriNetUnfolder]: 490/1649 cut-off events. [2022-11-16 11:22:45,642 INFO L131 PetriNetUnfolder]: For 15317/15317 co-relation queries the response was YES. [2022-11-16 11:22:45,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7787 conditions, 1649 events. 490/1649 cut-off events. For 15317/15317 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12374 event pairs, 15 based on Foata normal form. 2/1648 useless extension candidates. Maximal degree in co-relation 7716. Up to 315 conditions per place. [2022-11-16 11:22:45,664 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 190 selfloop transitions, 394 changer transitions 32/657 dead transitions. [2022-11-16 11:22:45,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 657 transitions, 7175 flow [2022-11-16 11:22:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-16 11:22:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-16 11:22:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 4564 transitions. [2022-11-16 11:22:45,673 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6393947884561502 [2022-11-16 11:22:45,673 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 4564 transitions. [2022-11-16 11:22:45,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 4564 transitions. [2022-11-16 11:22:45,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:22:45,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 4564 transitions. [2022-11-16 11:22:45,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 54.98795180722892) internal successors, (4564), 83 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:45,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:45,701 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:45,701 INFO L175 Difference]: Start difference. First operand has 269 places, 428 transitions, 3374 flow. Second operand 83 states and 4564 transitions. [2022-11-16 11:22:45,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 657 transitions, 7175 flow [2022-11-16 11:22:45,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 657 transitions, 6691 flow, removed 242 selfloop flow, removed 12 redundant places. [2022-11-16 11:22:45,827 INFO L231 Difference]: Finished difference. Result has 338 places, 522 transitions, 4999 flow [2022-11-16 11:22:45,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=4999, PETRI_PLACES=338, PETRI_TRANSITIONS=522} [2022-11-16 11:22:45,828 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 262 predicate places. [2022-11-16 11:22:45,828 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 522 transitions, 4999 flow [2022-11-16 11:22:45,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:45,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:22:45,830 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] [2022-11-16 11:22:45,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:46,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:22:46,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:22:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2101775999, now seen corresponding path program 4 times [2022-11-16 11:22:46,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:46,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495456213] [2022-11-16 11:22:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:46,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:46,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495456213] [2022-11-16 11:22:46,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495456213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:22:46,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068903920] [2022-11-16 11:22:46,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:22:46,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:46,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:22:46,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:22:46,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:22:46,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:22:46,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:46,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:22:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:47,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:47,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068903920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:47,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:22:47,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:22:47,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346074698] [2022-11-16 11:22:47,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:47,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:22:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:22:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:22:47,561 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:22:47,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 522 transitions, 4999 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:47,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:22:47,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:22:47,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:22:52,212 INFO L130 PetriNetUnfolder]: 650/2178 cut-off events. [2022-11-16 11:22:52,212 INFO L131 PetriNetUnfolder]: For 24694/24694 co-relation queries the response was YES. [2022-11-16 11:22:52,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11469 conditions, 2178 events. 650/2178 cut-off events. For 24694/24694 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17530 event pairs, 23 based on Foata normal form. 3/2178 useless extension candidates. Maximal degree in co-relation 11393. Up to 427 conditions per place. [2022-11-16 11:22:52,236 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 299 selfloop transitions, 484 changer transitions 24/848 dead transitions. [2022-11-16 11:22:52,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 848 transitions, 10549 flow [2022-11-16 11:22:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-16 11:22:52,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-16 11:22:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4335 transitions. [2022-11-16 11:22:52,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6462432915921288 [2022-11-16 11:22:52,244 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4335 transitions. [2022-11-16 11:22:52,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4335 transitions. [2022-11-16 11:22:52,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:22:52,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4335 transitions. [2022-11-16 11:22:52,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 55.57692307692308) internal successors, (4335), 78 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:52,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:52,267 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:52,267 INFO L175 Difference]: Start difference. First operand has 338 places, 522 transitions, 4999 flow. Second operand 78 states and 4335 transitions. [2022-11-16 11:22:52,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 848 transitions, 10549 flow [2022-11-16 11:22:52,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 848 transitions, 9655 flow, removed 201 selfloop flow, removed 40 redundant places. [2022-11-16 11:22:52,402 INFO L231 Difference]: Finished difference. Result has 391 places, 664 transitions, 7404 flow [2022-11-16 11:22:52,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=7404, PETRI_PLACES=391, PETRI_TRANSITIONS=664} [2022-11-16 11:22:52,403 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 315 predicate places. [2022-11-16 11:22:52,403 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 664 transitions, 7404 flow [2022-11-16 11:22:52,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:52,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:22:52,405 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] [2022-11-16 11:22:52,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 11:22:52,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:52,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:22:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash 510780421, now seen corresponding path program 5 times [2022-11-16 11:22:52,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:52,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88194579] [2022-11-16 11:22:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:53,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:53,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88194579] [2022-11-16 11:22:53,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88194579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:22:53,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701270256] [2022-11-16 11:22:53,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:22:53,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:22:53,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:22:53,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:22:53,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:22:53,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:53,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:22:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:53,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:54,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701270256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:54,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:22:54,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:22:54,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679617721] [2022-11-16 11:22:54,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:54,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:22:54,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:22:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:22:54,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:22:54,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 664 transitions, 7404 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:54,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:22:54,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:22:54,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:22:59,760 INFO L130 PetriNetUnfolder]: 665/2221 cut-off events. [2022-11-16 11:22:59,762 INFO L131 PetriNetUnfolder]: For 37489/37489 co-relation queries the response was YES. [2022-11-16 11:22:59,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13155 conditions, 2221 events. 665/2221 cut-off events. For 37489/37489 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17958 event pairs, 27 based on Foata normal form. 5/2222 useless extension candidates. Maximal degree in co-relation 13060. Up to 425 conditions per place. [2022-11-16 11:22:59,801 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 249 selfloop transitions, 523 changer transitions 35/848 dead transitions. [2022-11-16 11:22:59,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 848 transitions, 11873 flow [2022-11-16 11:22:59,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-16 11:22:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-11-16 11:22:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 5073 transitions. [2022-11-16 11:22:59,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6411779575328614 [2022-11-16 11:22:59,930 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 5073 transitions. [2022-11-16 11:22:59,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 5073 transitions. [2022-11-16 11:22:59,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:22:59,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 5073 transitions. [2022-11-16 11:22:59,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 55.141304347826086) internal successors, (5073), 92 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:59,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:59,968 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:59,968 INFO L175 Difference]: Start difference. First operand has 391 places, 664 transitions, 7404 flow. Second operand 92 states and 5073 transitions. [2022-11-16 11:22:59,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 848 transitions, 11873 flow [2022-11-16 11:23:00,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 848 transitions, 11067 flow, removed 283 selfloop flow, removed 32 redundant places. [2022-11-16 11:23:00,181 INFO L231 Difference]: Finished difference. Result has 461 places, 689 transitions, 8557 flow [2022-11-16 11:23:00,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=8557, PETRI_PLACES=461, PETRI_TRANSITIONS=689} [2022-11-16 11:23:00,183 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 385 predicate places. [2022-11-16 11:23:00,183 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 689 transitions, 8557 flow [2022-11-16 11:23:00,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:00,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:00,184 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] [2022-11-16 11:23:00,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:00,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:00,390 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:23:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1925482755, now seen corresponding path program 6 times [2022-11-16 11:23:00,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:00,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589288597] [2022-11-16 11:23:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:00,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:00,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:00,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589288597] [2022-11-16 11:23:00,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589288597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:00,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397701900] [2022-11-16 11:23:00,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:23:00,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:00,864 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:00,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:23:00,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:23:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:00,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:00,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:01,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:01,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397701900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:01,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:01,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:23:01,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520827169] [2022-11-16 11:23:01,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:01,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:23:01,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:01,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:23:01,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:23:01,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:23:01,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 689 transitions, 8557 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:01,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:01,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:23:01,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:23:05,236 INFO L130 PetriNetUnfolder]: 877/2830 cut-off events. [2022-11-16 11:23:05,236 INFO L131 PetriNetUnfolder]: For 47028/47028 co-relation queries the response was YES. [2022-11-16 11:23:05,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17740 conditions, 2830 events. 877/2830 cut-off events. For 47028/47028 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24194 event pairs, 60 based on Foata normal form. 2/2827 useless extension candidates. Maximal degree in co-relation 17634. Up to 924 conditions per place. [2022-11-16 11:23:05,283 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 320 selfloop transitions, 679 changer transitions 15/1055 dead transitions. [2022-11-16 11:23:05,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1055 transitions, 15934 flow [2022-11-16 11:23:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 11:23:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-11-16 11:23:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3245 transitions. [2022-11-16 11:23:05,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2022-11-16 11:23:05,289 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3245 transitions. [2022-11-16 11:23:05,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3245 transitions. [2022-11-16 11:23:05,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:23:05,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3245 transitions. [2022-11-16 11:23:05,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 55.0) internal successors, (3245), 59 states have internal predecessors, (3245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:05,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 86.0) internal successors, (5160), 60 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:05,304 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 86.0) internal successors, (5160), 60 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:05,304 INFO L175 Difference]: Start difference. First operand has 461 places, 689 transitions, 8557 flow. Second operand 59 states and 3245 transitions. [2022-11-16 11:23:05,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1055 transitions, 15934 flow [2022-11-16 11:23:05,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1055 transitions, 14828 flow, removed 127 selfloop flow, removed 66 redundant places. [2022-11-16 11:23:05,562 INFO L231 Difference]: Finished difference. Result has 460 places, 954 transitions, 13741 flow [2022-11-16 11:23:05,562 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=13741, PETRI_PLACES=460, PETRI_TRANSITIONS=954} [2022-11-16 11:23:05,563 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 384 predicate places. [2022-11-16 11:23:05,563 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 954 transitions, 13741 flow [2022-11-16 11:23:05,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:05,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:05,564 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] [2022-11-16 11:23:05,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:05,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:23:05,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:23:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1043953735, now seen corresponding path program 7 times [2022-11-16 11:23:05,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:05,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236118021] [2022-11-16 11:23:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:05,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:06,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:06,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236118021] [2022-11-16 11:23:06,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236118021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:06,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215030411] [2022-11-16 11:23:06,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:23:06,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:06,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:06,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:23:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:06,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:06,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:07,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215030411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:07,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:07,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:23:07,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268165308] [2022-11-16 11:23:07,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:07,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:23:07,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:23:07,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:23:07,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:23:07,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 954 transitions, 13741 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:07,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:07,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:23:07,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:23:11,996 INFO L130 PetriNetUnfolder]: 973/3125 cut-off events. [2022-11-16 11:23:11,997 INFO L131 PetriNetUnfolder]: For 56343/56343 co-relation queries the response was YES. [2022-11-16 11:23:12,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21001 conditions, 3125 events. 973/3125 cut-off events. For 56343/56343 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27531 event pairs, 53 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 20887. Up to 929 conditions per place. [2022-11-16 11:23:12,039 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 318 selfloop transitions, 828 changer transitions 20/1207 dead transitions. [2022-11-16 11:23:12,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1207 transitions, 20147 flow [2022-11-16 11:23:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 11:23:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-16 11:23:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3758 transitions. [2022-11-16 11:23:12,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6426128590971272 [2022-11-16 11:23:12,047 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3758 transitions. [2022-11-16 11:23:12,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3758 transitions. [2022-11-16 11:23:12,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:23:12,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3758 transitions. [2022-11-16 11:23:12,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.26470588235294) internal successors, (3758), 68 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,069 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,069 INFO L175 Difference]: Start difference. First operand has 460 places, 954 transitions, 13741 flow. Second operand 68 states and 3758 transitions. [2022-11-16 11:23:12,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1207 transitions, 20147 flow [2022-11-16 11:23:12,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1207 transitions, 19252 flow, removed 317 selfloop flow, removed 23 redundant places. [2022-11-16 11:23:12,729 INFO L231 Difference]: Finished difference. Result has 518 places, 1098 transitions, 17745 flow [2022-11-16 11:23:12,730 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=13017, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=17745, PETRI_PLACES=518, PETRI_TRANSITIONS=1098} [2022-11-16 11:23:12,731 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 442 predicate places. [2022-11-16 11:23:12,731 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1098 transitions, 17745 flow [2022-11-16 11:23:12,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:12,732 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] [2022-11-16 11:23:12,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:12,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:23:12,938 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:23:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:12,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1347790129, now seen corresponding path program 8 times [2022-11-16 11:23:12,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:12,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891550660] [2022-11-16 11:23:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:12,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:13,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:13,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891550660] [2022-11-16 11:23:13,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891550660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:13,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888072062] [2022-11-16 11:23:13,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:13,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:13,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:13,407 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:13,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:23:13,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:23:13,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:13,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:13,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:13,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:14,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888072062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:14,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:14,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:23:14,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545715699] [2022-11-16 11:23:14,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:23:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:23:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:23:14,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:23:14,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1098 transitions, 17745 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:14,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:14,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:23:14,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:23:18,137 INFO L130 PetriNetUnfolder]: 964/3093 cut-off events. [2022-11-16 11:23:18,137 INFO L131 PetriNetUnfolder]: For 63547/63547 co-relation queries the response was YES. [2022-11-16 11:23:18,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21722 conditions, 3093 events. 964/3093 cut-off events. For 63547/63547 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 27168 event pairs, 68 based on Foata normal form. 2/3090 useless extension candidates. Maximal degree in co-relation 21602. Up to 880 conditions per place. [2022-11-16 11:23:18,179 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 378 selfloop transitions, 751 changer transitions 17/1187 dead transitions. [2022-11-16 11:23:18,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1187 transitions, 21538 flow [2022-11-16 11:23:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 11:23:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-16 11:23:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3414 transitions. [2022-11-16 11:23:18,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.640285071267817 [2022-11-16 11:23:18,184 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3414 transitions. [2022-11-16 11:23:18,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3414 transitions. [2022-11-16 11:23:18,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:23:18,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3414 transitions. [2022-11-16 11:23:18,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 55.064516129032256) internal successors, (3414), 62 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:18,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:18,199 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:18,199 INFO L175 Difference]: Start difference. First operand has 518 places, 1098 transitions, 17745 flow. Second operand 62 states and 3414 transitions. [2022-11-16 11:23:18,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1187 transitions, 21538 flow [2022-11-16 11:23:19,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 1187 transitions, 20573 flow, removed 178 selfloop flow, removed 41 redundant places. [2022-11-16 11:23:19,040 INFO L231 Difference]: Finished difference. Result has 542 places, 1108 transitions, 18601 flow [2022-11-16 11:23:19,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=16823, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=739, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=18601, PETRI_PLACES=542, PETRI_TRANSITIONS=1108} [2022-11-16 11:23:19,041 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 466 predicate places. [2022-11-16 11:23:19,042 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 1108 transitions, 18601 flow [2022-11-16 11:23:19,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:19,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:19,043 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] [2022-11-16 11:23:19,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:19,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:19,244 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:23:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1779040675, now seen corresponding path program 9 times [2022-11-16 11:23:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:19,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411782975] [2022-11-16 11:23:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:19,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411782975] [2022-11-16 11:23:19,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411782975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:19,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953140701] [2022-11-16 11:23:19,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:23:19,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:19,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:19,730 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:19,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:23:19,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:23:19,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:20,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:20,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953140701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:20,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:20,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:23:20,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398453298] [2022-11-16 11:23:20,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:20,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:23:20,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:23:20,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:23:20,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:23:20,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 1108 transitions, 18601 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:20,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:20,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:23:20,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:23:24,070 INFO L130 PetriNetUnfolder]: 1042/3297 cut-off events. [2022-11-16 11:23:24,070 INFO L131 PetriNetUnfolder]: For 69365/69365 co-relation queries the response was YES. [2022-11-16 11:23:24,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24306 conditions, 3297 events. 1042/3297 cut-off events. For 69365/69365 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29311 event pairs, 72 based on Foata normal form. 1/3293 useless extension candidates. Maximal degree in co-relation 24181. Up to 1404 conditions per place. [2022-11-16 11:23:24,112 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 525 selfloop transitions, 717 changer transitions 9/1292 dead transitions. [2022-11-16 11:23:24,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1292 transitions, 24208 flow [2022-11-16 11:23:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 11:23:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-16 11:23:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2314 transitions. [2022-11-16 11:23:24,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6406423034330011 [2022-11-16 11:23:24,116 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2314 transitions. [2022-11-16 11:23:24,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2314 transitions. [2022-11-16 11:23:24,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:23:24,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2314 transitions. [2022-11-16 11:23:24,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.095238095238095) internal successors, (2314), 42 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:24,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:24,126 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:24,126 INFO L175 Difference]: Start difference. First operand has 542 places, 1108 transitions, 18601 flow. Second operand 42 states and 2314 transitions. [2022-11-16 11:23:24,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1292 transitions, 24208 flow [2022-11-16 11:23:24,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1292 transitions, 23717 flow, removed 48 selfloop flow, removed 36 redundant places. [2022-11-16 11:23:24,817 INFO L231 Difference]: Finished difference. Result has 556 places, 1230 transitions, 22944 flow [2022-11-16 11:23:24,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=18188, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=22944, PETRI_PLACES=556, PETRI_TRANSITIONS=1230} [2022-11-16 11:23:24,819 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 480 predicate places. [2022-11-16 11:23:24,819 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1230 transitions, 22944 flow [2022-11-16 11:23:24,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:24,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:24,820 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] [2022-11-16 11:23:24,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:25,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:23:25,025 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:23:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash -881035819, now seen corresponding path program 10 times [2022-11-16 11:23:25,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:25,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532974378] [2022-11-16 11:23:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:25,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:25,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532974378] [2022-11-16 11:23:25,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532974378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:25,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302263772] [2022-11-16 11:23:25,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:23:25,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:25,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:25,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:23:25,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:23:25,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:25,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:25,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:26,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302263772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:26,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:26,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:23:26,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102016295] [2022-11-16 11:23:26,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:26,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:23:26,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:26,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:23:26,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:23:26,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:23:26,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1230 transitions, 22944 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:26,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:26,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:23:26,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:23:30,739 INFO L130 PetriNetUnfolder]: 1083/3436 cut-off events. [2022-11-16 11:23:30,739 INFO L131 PetriNetUnfolder]: For 77849/77849 co-relation queries the response was YES. [2022-11-16 11:23:30,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27241 conditions, 3436 events. 1083/3436 cut-off events. For 77849/77849 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 30953 event pairs, 72 based on Foata normal form. 1/3432 useless extension candidates. Maximal degree in co-relation 27110. Up to 1317 conditions per place. [2022-11-16 11:23:30,919 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 460 selfloop transitions, 856 changer transitions 13/1370 dead transitions. [2022-11-16 11:23:30,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1370 transitions, 28294 flow [2022-11-16 11:23:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 11:23:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-16 11:23:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2814 transitions. [2022-11-16 11:23:30,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6415868673050615 [2022-11-16 11:23:30,922 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2814 transitions. [2022-11-16 11:23:30,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2814 transitions. [2022-11-16 11:23:30,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:23:30,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2814 transitions. [2022-11-16 11:23:30,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.1764705882353) internal successors, (2814), 51 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:30,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:30,934 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:30,935 INFO L175 Difference]: Start difference. First operand has 556 places, 1230 transitions, 22944 flow. Second operand 51 states and 2814 transitions. [2022-11-16 11:23:30,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1370 transitions, 28294 flow [2022-11-16 11:23:31,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1370 transitions, 28132 flow, removed 62 selfloop flow, removed 9 redundant places. [2022-11-16 11:23:31,635 INFO L231 Difference]: Finished difference. Result has 606 places, 1288 transitions, 26273 flow [2022-11-16 11:23:31,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22808, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=26273, PETRI_PLACES=606, PETRI_TRANSITIONS=1288} [2022-11-16 11:23:31,637 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 530 predicate places. [2022-11-16 11:23:31,637 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 1288 transitions, 26273 flow [2022-11-16 11:23:31,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:31,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:31,638 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] [2022-11-16 11:23:31,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:31,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:23:31,838 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:23:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1729021351, now seen corresponding path program 11 times [2022-11-16 11:23:31,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:31,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313844327] [2022-11-16 11:23:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:31,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:32,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:32,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313844327] [2022-11-16 11:23:32,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313844327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:32,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218444969] [2022-11-16 11:23:32,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:23:32,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:32,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:32,259 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:32,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:23:32,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:23:32,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:32,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:33,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218444969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:33,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:33,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:23:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746157922] [2022-11-16 11:23:33,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:33,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:23:33,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:23:33,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:23:33,298 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:23:33,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1288 transitions, 26273 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:33,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:33,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:23:33,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:23:37,181 INFO L130 PetriNetUnfolder]: 1129/3560 cut-off events. [2022-11-16 11:23:37,181 INFO L131 PetriNetUnfolder]: For 91819/91819 co-relation queries the response was YES. [2022-11-16 11:23:37,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30370 conditions, 3560 events. 1129/3560 cut-off events. For 91819/91819 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 32257 event pairs, 69 based on Foata normal form. 1/3554 useless extension candidates. Maximal degree in co-relation 30229. Up to 1429 conditions per place. [2022-11-16 11:23:37,247 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 503 selfloop transitions, 943 changer transitions 9/1496 dead transitions. [2022-11-16 11:23:37,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1496 transitions, 33318 flow [2022-11-16 11:23:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 11:23:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-16 11:23:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2799 transitions. [2022-11-16 11:23:37,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6381668946648427 [2022-11-16 11:23:37,252 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2799 transitions. [2022-11-16 11:23:37,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2799 transitions. [2022-11-16 11:23:37,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:23:37,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2799 transitions. [2022-11-16 11:23:37,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 54.88235294117647) internal successors, (2799), 51 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:37,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:37,266 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:37,266 INFO L175 Difference]: Start difference. First operand has 606 places, 1288 transitions, 26273 flow. Second operand 51 states and 2799 transitions. [2022-11-16 11:23:37,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1496 transitions, 33318 flow [2022-11-16 11:23:38,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 1496 transitions, 32484 flow, removed 118 selfloop flow, removed 32 redundant places. [2022-11-16 11:23:38,399 INFO L231 Difference]: Finished difference. Result has 638 places, 1418 transitions, 31601 flow [2022-11-16 11:23:38,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=25495, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=31601, PETRI_PLACES=638, PETRI_TRANSITIONS=1418} [2022-11-16 11:23:38,401 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 562 predicate places. [2022-11-16 11:23:38,401 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 1418 transitions, 31601 flow [2022-11-16 11:23:38,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:38,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:38,402 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] [2022-11-16 11:23:38,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:38,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:38,607 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:23:38,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1361499201, now seen corresponding path program 12 times [2022-11-16 11:23:38,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:38,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232903920] [2022-11-16 11:23:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:38,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:39,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:39,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232903920] [2022-11-16 11:23:39,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232903920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:39,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588865262] [2022-11-16 11:23:39,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:23:39,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:39,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:39,030 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:39,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:23:39,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:23:39,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:39,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:39,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:40,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588865262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:40,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:40,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:23:40,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973501791] [2022-11-16 11:23:40,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:40,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:23:40,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:23:40,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:23:40,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:23:40,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 1418 transitions, 31601 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:40,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:40,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:23:40,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:23:44,642 INFO L130 PetriNetUnfolder]: 1160/3664 cut-off events. [2022-11-16 11:23:44,642 INFO L131 PetriNetUnfolder]: For 106790/106790 co-relation queries the response was YES. [2022-11-16 11:23:44,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33584 conditions, 3664 events. 1160/3664 cut-off events. For 106790/106790 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 33474 event pairs, 73 based on Foata normal form. 1/3659 useless extension candidates. Maximal degree in co-relation 33429. Up to 1359 conditions per place. [2022-11-16 11:23:44,691 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 466 selfloop transitions, 1044 changer transitions 14/1565 dead transitions. [2022-11-16 11:23:44,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 1565 transitions, 37802 flow [2022-11-16 11:23:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 11:23:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-16 11:23:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3195 transitions. [2022-11-16 11:23:44,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6405372894947875 [2022-11-16 11:23:44,694 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3195 transitions. [2022-11-16 11:23:44,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3195 transitions. [2022-11-16 11:23:44,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:23:44,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3195 transitions. [2022-11-16 11:23:44,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.08620689655172) internal successors, (3195), 58 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:44,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:44,703 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:44,703 INFO L175 Difference]: Start difference. First operand has 638 places, 1418 transitions, 31601 flow. Second operand 58 states and 3195 transitions. [2022-11-16 11:23:44,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 1565 transitions, 37802 flow [2022-11-16 11:23:46,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 1565 transitions, 37343 flow, removed 121 selfloop flow, removed 19 redundant places. [2022-11-16 11:23:46,405 INFO L231 Difference]: Finished difference. Result has 685 places, 1466 transitions, 34869 flow [2022-11-16 11:23:46,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=31172, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=34869, PETRI_PLACES=685, PETRI_TRANSITIONS=1466} [2022-11-16 11:23:46,407 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 609 predicate places. [2022-11-16 11:23:46,407 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 1466 transitions, 34869 flow [2022-11-16 11:23:46,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:46,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:46,408 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] [2022-11-16 11:23:46,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:46,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:23:46,613 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:23:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:46,614 INFO L85 PathProgramCache]: Analyzing trace with hash -458555649, now seen corresponding path program 13 times [2022-11-16 11:23:46,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:46,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964172914] [2022-11-16 11:23:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:47,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964172914] [2022-11-16 11:23:47,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964172914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617440922] [2022-11-16 11:23:47,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:23:47,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:47,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:47,047 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:47,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:23:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:47,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:47,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:48,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617440922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:48,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:48,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:23:48,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608750535] [2022-11-16 11:23:48,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:48,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:23:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:48,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:23:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:23:48,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:23:48,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 1466 transitions, 34869 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:48,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:48,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:23:48,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:23:53,058 INFO L130 PetriNetUnfolder]: 1166/3712 cut-off events. [2022-11-16 11:23:53,058 INFO L131 PetriNetUnfolder]: For 120917/120917 co-relation queries the response was YES. [2022-11-16 11:23:53,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35665 conditions, 3712 events. 1166/3712 cut-off events. For 120917/120917 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 34158 event pairs, 74 based on Foata normal form. 1/3707 useless extension candidates. Maximal degree in co-relation 35502. Up to 1517 conditions per place. [2022-11-16 11:23:53,123 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 619 selfloop transitions, 922 changer transitions 9/1591 dead transitions. [2022-11-16 11:23:53,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 1591 transitions, 40547 flow [2022-11-16 11:23:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:23:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:23:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2688 transitions. [2022-11-16 11:23:53,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2022-11-16 11:23:53,128 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2688 transitions. [2022-11-16 11:23:53,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2688 transitions. [2022-11-16 11:23:53,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:23:53,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2688 transitions. [2022-11-16 11:23:53,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.857142857142854) internal successors, (2688), 49 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:53,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:53,137 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:53,138 INFO L175 Difference]: Start difference. First operand has 685 places, 1466 transitions, 34869 flow. Second operand 49 states and 2688 transitions. [2022-11-16 11:23:53,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 1591 transitions, 40547 flow [2022-11-16 11:23:54,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 1591 transitions, 39329 flow, removed 169 selfloop flow, removed 34 redundant places. [2022-11-16 11:23:54,613 INFO L231 Difference]: Finished difference. Result has 710 places, 1514 transitions, 37959 flow [2022-11-16 11:23:54,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=33689, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=37959, PETRI_PLACES=710, PETRI_TRANSITIONS=1514} [2022-11-16 11:23:54,615 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 634 predicate places. [2022-11-16 11:23:54,615 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 1514 transitions, 37959 flow [2022-11-16 11:23:54,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:54,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:23:54,616 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] [2022-11-16 11:23:54,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:54,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:23:54,821 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:23:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash 481243395, now seen corresponding path program 14 times [2022-11-16 11:23:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:23:54,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129489360] [2022-11-16 11:23:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:54,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:23:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:55,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:23:55,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129489360] [2022-11-16 11:23:55,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129489360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:23:55,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391690595] [2022-11-16 11:23:55,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:55,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:23:55,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:23:55,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:23:55,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:23:55,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:23:55,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:55,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:55,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:55,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:56,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391690595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:56,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:23:56,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:23:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745957127] [2022-11-16 11:23:56,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:23:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:23:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:23:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:23:56,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:23:56,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 1514 transitions, 37959 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:56,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:23:56,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:23:56,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:24:00,869 INFO L130 PetriNetUnfolder]: 1166/3680 cut-off events. [2022-11-16 11:24:00,869 INFO L131 PetriNetUnfolder]: For 130965/130965 co-relation queries the response was YES. [2022-11-16 11:24:00,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37226 conditions, 3680 events. 1166/3680 cut-off events. For 130965/130965 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33663 event pairs, 80 based on Foata normal form. 1/3675 useless extension candidates. Maximal degree in co-relation 37053. Up to 1354 conditions per place. [2022-11-16 11:24:00,915 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 675 selfloop transitions, 863 changer transitions 11/1590 dead transitions. [2022-11-16 11:24:00,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 1590 transitions, 42412 flow [2022-11-16 11:24:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:24:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-16 11:24:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2215 transitions. [2022-11-16 11:24:00,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6438953488372093 [2022-11-16 11:24:00,919 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2215 transitions. [2022-11-16 11:24:00,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2215 transitions. [2022-11-16 11:24:00,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:24:00,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2215 transitions. [2022-11-16 11:24:00,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.375) internal successors, (2215), 40 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:00,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:00,926 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:00,926 INFO L175 Difference]: Start difference. First operand has 710 places, 1514 transitions, 37959 flow. Second operand 40 states and 2215 transitions. [2022-11-16 11:24:00,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 1590 transitions, 42412 flow [2022-11-16 11:24:02,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 723 places, 1590 transitions, 42059 flow, removed 62 selfloop flow, removed 23 redundant places. [2022-11-16 11:24:02,476 INFO L231 Difference]: Finished difference. Result has 728 places, 1520 transitions, 39583 flow [2022-11-16 11:24:02,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=37623, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=856, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=39583, PETRI_PLACES=728, PETRI_TRANSITIONS=1520} [2022-11-16 11:24:02,477 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 652 predicate places. [2022-11-16 11:24:02,478 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 1520 transitions, 39583 flow [2022-11-16 11:24:02,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:02,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:24:02,478 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] [2022-11-16 11:24:02,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-16 11:24:02,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:24:02,679 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:24:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1636260209, now seen corresponding path program 15 times [2022-11-16 11:24:02,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:24:02,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310998361] [2022-11-16 11:24:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:02,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:24:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:03,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:24:03,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310998361] [2022-11-16 11:24:03,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310998361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:24:03,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830308983] [2022-11-16 11:24:03,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:24:03,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:03,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:24:03,072 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:24:03,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:24:03,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:24:03,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:03,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:24:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:03,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:04,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830308983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:04,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:24:04,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:24:04,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963359222] [2022-11-16 11:24:04,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:04,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:24:04,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:24:04,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:24:04,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:24:04,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:24:04,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1520 transitions, 39583 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:04,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:24:04,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:24:04,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:24:09,536 INFO L130 PetriNetUnfolder]: 1193/3777 cut-off events. [2022-11-16 11:24:09,537 INFO L131 PetriNetUnfolder]: For 141435/141435 co-relation queries the response was YES. [2022-11-16 11:24:09,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39423 conditions, 3777 events. 1193/3777 cut-off events. For 141435/141435 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 34853 event pairs, 71 based on Foata normal form. 1/3771 useless extension candidates. Maximal degree in co-relation 39249. Up to 1414 conditions per place. [2022-11-16 11:24:09,586 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 534 selfloop transitions, 1071 changer transitions 13/1659 dead transitions. [2022-11-16 11:24:09,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 1659 transitions, 46045 flow [2022-11-16 11:24:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 11:24:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-16 11:24:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3194 transitions. [2022-11-16 11:24:09,591 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.640336808340016 [2022-11-16 11:24:09,591 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3194 transitions. [2022-11-16 11:24:09,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3194 transitions. [2022-11-16 11:24:09,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:24:09,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3194 transitions. [2022-11-16 11:24:09,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.06896551724138) internal successors, (3194), 58 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:09,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:09,602 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:09,602 INFO L175 Difference]: Start difference. First operand has 728 places, 1520 transitions, 39583 flow. Second operand 58 states and 3194 transitions. [2022-11-16 11:24:09,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 1659 transitions, 46045 flow [2022-11-16 11:24:11,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 1659 transitions, 45096 flow, removed 58 selfloop flow, removed 31 redundant places. [2022-11-16 11:24:11,273 INFO L231 Difference]: Finished difference. Result has 762 places, 1563 transitions, 42610 flow [2022-11-16 11:24:11,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=38695, PETRI_DIFFERENCE_MINUEND_PLACES=692, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=42610, PETRI_PLACES=762, PETRI_TRANSITIONS=1563} [2022-11-16 11:24:11,275 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 686 predicate places. [2022-11-16 11:24:11,275 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 1563 transitions, 42610 flow [2022-11-16 11:24:11,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:11,275 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:24:11,276 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] [2022-11-16 11:24:11,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:11,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:24:11,477 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:24:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:11,477 INFO L85 PathProgramCache]: Analyzing trace with hash -195787561, now seen corresponding path program 16 times [2022-11-16 11:24:11,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:24:11,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882140786] [2022-11-16 11:24:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:11,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:24:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:11,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:24:11,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882140786] [2022-11-16 11:24:11,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882140786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:24:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921114320] [2022-11-16 11:24:11,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:24:11,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:11,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:24:11,896 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:24:11,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:24:11,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:24:11,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:24:11,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:12,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:13,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921114320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:13,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:24:13,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:24:13,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426465194] [2022-11-16 11:24:13,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:24:13,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:24:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:24:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:24:13,080 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:24:13,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 1563 transitions, 42610 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:13,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:24:13,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:24:13,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:24:17,397 INFO L130 PetriNetUnfolder]: 1188/3746 cut-off events. [2022-11-16 11:24:17,398 INFO L131 PetriNetUnfolder]: For 150360/150360 co-relation queries the response was YES. [2022-11-16 11:24:17,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40770 conditions, 3746 events. 1188/3746 cut-off events. For 150360/150360 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34452 event pairs, 73 based on Foata normal form. 1/3741 useless extension candidates. Maximal degree in co-relation 40588. Up to 1326 conditions per place. [2022-11-16 11:24:17,452 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 679 selfloop transitions, 904 changer transitions 11/1635 dead transitions. [2022-11-16 11:24:17,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 801 places, 1635 transitions, 47111 flow [2022-11-16 11:24:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 11:24:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-16 11:24:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2373 transitions. [2022-11-16 11:24:17,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6416982152514873 [2022-11-16 11:24:17,455 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2373 transitions. [2022-11-16 11:24:17,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2373 transitions. [2022-11-16 11:24:17,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:24:17,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2373 transitions. [2022-11-16 11:24:17,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.18604651162791) internal successors, (2373), 43 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:17,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:17,461 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:17,461 INFO L175 Difference]: Start difference. First operand has 762 places, 1563 transitions, 42610 flow. Second operand 43 states and 2373 transitions. [2022-11-16 11:24:17,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 801 places, 1635 transitions, 47111 flow [2022-11-16 11:24:19,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1635 transitions, 45956 flow, removed 158 selfloop flow, removed 31 redundant places. [2022-11-16 11:24:19,406 INFO L231 Difference]: Finished difference. Result has 774 places, 1565 transitions, 43411 flow [2022-11-16 11:24:19,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=41466, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=900, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=43411, PETRI_PLACES=774, PETRI_TRANSITIONS=1565} [2022-11-16 11:24:19,407 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 698 predicate places. [2022-11-16 11:24:19,407 INFO L495 AbstractCegarLoop]: Abstraction has has 774 places, 1565 transitions, 43411 flow [2022-11-16 11:24:19,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:19,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:24:19,408 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] [2022-11-16 11:24:19,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:19,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:19,609 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:24:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash -348746405, now seen corresponding path program 17 times [2022-11-16 11:24:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:24:19,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017423161] [2022-11-16 11:24:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:24:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:19,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:24:19,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017423161] [2022-11-16 11:24:19,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017423161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:24:19,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529276082] [2022-11-16 11:24:19,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:24:19,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:19,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:24:19,975 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:24:19,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:24:20,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:24:20,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:20,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:24:20,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:20,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:21,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529276082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:21,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:24:21,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-16 11:24:21,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667687867] [2022-11-16 11:24:21,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:21,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:24:21,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:24:21,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:24:21,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:24:21,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:24:21,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 1565 transitions, 43411 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:21,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:24:21,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:24:21,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:24:25,682 INFO L130 PetriNetUnfolder]: 1187/3733 cut-off events. [2022-11-16 11:24:25,682 INFO L131 PetriNetUnfolder]: For 155026/155026 co-relation queries the response was YES. [2022-11-16 11:24:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41327 conditions, 3733 events. 1187/3733 cut-off events. For 155026/155026 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 34251 event pairs, 79 based on Foata normal form. 1/3729 useless extension candidates. Maximal degree in co-relation 41144. Up to 1329 conditions per place. [2022-11-16 11:24:25,875 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 692 selfloop transitions, 887 changer transitions 11/1631 dead transitions. [2022-11-16 11:24:25,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 1631 transitions, 47784 flow [2022-11-16 11:24:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:24:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:24:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2691 transitions. [2022-11-16 11:24:25,878 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6385856668248695 [2022-11-16 11:24:25,878 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2691 transitions. [2022-11-16 11:24:25,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2691 transitions. [2022-11-16 11:24:25,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:24:25,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2691 transitions. [2022-11-16 11:24:25,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.91836734693877) internal successors, (2691), 49 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:25,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:25,884 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:25,884 INFO L175 Difference]: Start difference. First operand has 774 places, 1565 transitions, 43411 flow. Second operand 49 states and 2691 transitions. [2022-11-16 11:24:25,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 1631 transitions, 47784 flow [2022-11-16 11:24:27,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 1631 transitions, 47321 flow, removed 65 selfloop flow, removed 28 redundant places. [2022-11-16 11:24:27,572 INFO L231 Difference]: Finished difference. Result has 794 places, 1569 transitions, 44903 flow [2022-11-16 11:24:27,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=42988, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=44903, PETRI_PLACES=794, PETRI_TRANSITIONS=1569} [2022-11-16 11:24:27,574 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 718 predicate places. [2022-11-16 11:24:27,574 INFO L495 AbstractCegarLoop]: Abstraction has has 794 places, 1569 transitions, 44903 flow [2022-11-16 11:24:27,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:27,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:24:27,574 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] [2022-11-16 11:24:27,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:27,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:27,775 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:24:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash 117222831, now seen corresponding path program 18 times [2022-11-16 11:24:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:24:27,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070482907] [2022-11-16 11:24:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:27,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:24:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:27,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:24:27,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070482907] [2022-11-16 11:24:27,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070482907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:24:27,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183655627] [2022-11-16 11:24:27,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:24:27,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:24:27,848 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:24:27,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:24:27,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:24:27,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:24:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:28,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:28,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183655627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:28,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:24:28,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-11-16 11:24:28,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922571491] [2022-11-16 11:24:28,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:28,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:24:28,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:24:28,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:24:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:24:28,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2022-11-16 11:24:28,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 1569 transitions, 44903 flow. Second operand has 10 states, 10 states have (on average 69.7) internal successors, (697), 10 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:28,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:24:28,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2022-11-16 11:24:28,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:24:30,058 INFO L130 PetriNetUnfolder]: 1157/3574 cut-off events. [2022-11-16 11:24:30,058 INFO L131 PetriNetUnfolder]: For 151127/151287 co-relation queries the response was YES. [2022-11-16 11:24:30,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40001 conditions, 3574 events. 1157/3574 cut-off events. For 151127/151287 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 32450 event pairs, 70 based on Foata normal form. 45/3599 useless extension candidates. Maximal degree in co-relation 39821. Up to 1089 conditions per place. [2022-11-16 11:24:30,113 INFO L137 encePairwiseOnDemand]: 80/86 looper letters, 428 selfloop transitions, 594 changer transitions 0/1596 dead transitions. [2022-11-16 11:24:30,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 1596 transitions, 48162 flow [2022-11-16 11:24:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:24:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:24:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 499 transitions. [2022-11-16 11:24:30,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8289036544850499 [2022-11-16 11:24:30,117 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 499 transitions. [2022-11-16 11:24:30,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 499 transitions. [2022-11-16 11:24:30,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:24:30,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 499 transitions. [2022-11-16 11:24:30,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.28571428571429) internal successors, (499), 7 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:30,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:30,119 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:30,119 INFO L175 Difference]: Start difference. First operand has 794 places, 1569 transitions, 44903 flow. Second operand 7 states and 499 transitions. [2022-11-16 11:24:30,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 1596 transitions, 48162 flow [2022-11-16 11:24:31,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 1596 transitions, 47405 flow, removed 25 selfloop flow, removed 36 redundant places. [2022-11-16 11:24:31,581 INFO L231 Difference]: Finished difference. Result has 734 places, 1576 transitions, 47087 flow [2022-11-16 11:24:31,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=43281, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=964, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=47087, PETRI_PLACES=734, PETRI_TRANSITIONS=1576} [2022-11-16 11:24:31,582 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 658 predicate places. [2022-11-16 11:24:31,583 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 1576 transitions, 47087 flow [2022-11-16 11:24:31,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.7) internal successors, (697), 10 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:31,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:24:31,583 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] [2022-11-16 11:24:31,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-16 11:24:31,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:24:31,788 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:24:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1899870451, now seen corresponding path program 19 times [2022-11-16 11:24:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:24:31,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653681755] [2022-11-16 11:24:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:31,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:24:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:32,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:24:32,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653681755] [2022-11-16 11:24:32,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653681755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:24:32,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972503117] [2022-11-16 11:24:32,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:24:32,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:32,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:24:32,117 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:24:32,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:24:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:32,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:24:32,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:32,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:33,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972503117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:33,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:24:33,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-16 11:24:33,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181811994] [2022-11-16 11:24:33,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:33,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:24:33,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:24:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:24:33,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:24:33,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:24:33,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 1576 transitions, 47087 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:33,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:24:33,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:24:33,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:24:38,520 INFO L130 PetriNetUnfolder]: 1507/4592 cut-off events. [2022-11-16 11:24:38,520 INFO L131 PetriNetUnfolder]: For 205415/205415 co-relation queries the response was YES. [2022-11-16 11:24:38,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54479 conditions, 4592 events. 1507/4592 cut-off events. For 205415/205415 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 43919 event pairs, 88 based on Foata normal form. 5/4587 useless extension candidates. Maximal degree in co-relation 54306. Up to 1849 conditions per place. [2022-11-16 11:24:38,590 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 828 selfloop transitions, 1172 changer transitions 35/2076 dead transitions. [2022-11-16 11:24:38,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 782 places, 2076 transitions, 66516 flow [2022-11-16 11:24:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:24:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:24:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2703 transitions. [2022-11-16 11:24:38,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6414333175130518 [2022-11-16 11:24:38,592 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2703 transitions. [2022-11-16 11:24:38,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2703 transitions. [2022-11-16 11:24:38,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:24:38,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2703 transitions. [2022-11-16 11:24:38,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.16326530612245) internal successors, (2703), 49 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:38,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:38,600 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:38,600 INFO L175 Difference]: Start difference. First operand has 734 places, 1576 transitions, 47087 flow. Second operand 49 states and 2703 transitions. [2022-11-16 11:24:38,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 782 places, 2076 transitions, 66516 flow [2022-11-16 11:24:40,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 2076 transitions, 66490 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-16 11:24:40,811 INFO L231 Difference]: Finished difference. Result has 815 places, 1935 transitions, 64195 flow [2022-11-16 11:24:40,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=47067, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=837, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=64195, PETRI_PLACES=815, PETRI_TRANSITIONS=1935} [2022-11-16 11:24:40,812 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 739 predicate places. [2022-11-16 11:24:40,813 INFO L495 AbstractCegarLoop]: Abstraction has has 815 places, 1935 transitions, 64195 flow [2022-11-16 11:24:40,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:40,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:24:40,813 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] [2022-11-16 11:24:40,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:41,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:41,014 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:24:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:41,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1876532367, now seen corresponding path program 20 times [2022-11-16 11:24:41,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:24:41,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095433854] [2022-11-16 11:24:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:41,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:24:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:41,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:24:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095433854] [2022-11-16 11:24:41,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095433854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:24:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247831937] [2022-11-16 11:24:41,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:24:41,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:41,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:24:41,330 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:24:41,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:24:41,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:24:41,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:41,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:24:41,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:41,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:42,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247831937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:42,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:24:42,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-16 11:24:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964232051] [2022-11-16 11:24:42,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:42,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:24:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:24:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:24:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:24:42,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:24:42,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 815 places, 1935 transitions, 64195 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:42,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:24:42,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:24:42,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:24:49,880 INFO L130 PetriNetUnfolder]: 1724/5303 cut-off events. [2022-11-16 11:24:49,880 INFO L131 PetriNetUnfolder]: For 306089/306094 co-relation queries the response was YES. [2022-11-16 11:24:49,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68606 conditions, 5303 events. 1724/5303 cut-off events. For 306089/306094 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 52414 event pairs, 80 based on Foata normal form. 6/5305 useless extension candidates. Maximal degree in co-relation 68398. Up to 1666 conditions per place. [2022-11-16 11:24:49,969 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 865 selfloop transitions, 1433 changer transitions 53/2392 dead transitions. [2022-11-16 11:24:49,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 2392 transitions, 83700 flow [2022-11-16 11:24:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 11:24:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-16 11:24:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3356 transitions. [2022-11-16 11:24:49,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6397255051467785 [2022-11-16 11:24:49,974 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3356 transitions. [2022-11-16 11:24:49,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3356 transitions. [2022-11-16 11:24:49,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:24:49,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3356 transitions. [2022-11-16 11:24:49,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 55.01639344262295) internal successors, (3356), 61 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:49,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:49,983 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:49,984 INFO L175 Difference]: Start difference. First operand has 815 places, 1935 transitions, 64195 flow. Second operand 61 states and 3356 transitions. [2022-11-16 11:24:49,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 865 places, 2392 transitions, 83700 flow [2022-11-16 11:24:53,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 2392 transitions, 83170 flow, removed 259 selfloop flow, removed 12 redundant places. [2022-11-16 11:24:53,595 INFO L231 Difference]: Finished difference. Result has 885 places, 2226 transitions, 80226 flow [2022-11-16 11:24:53,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=63807, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=80226, PETRI_PLACES=885, PETRI_TRANSITIONS=2226} [2022-11-16 11:24:53,596 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 809 predicate places. [2022-11-16 11:24:53,597 INFO L495 AbstractCegarLoop]: Abstraction has has 885 places, 2226 transitions, 80226 flow [2022-11-16 11:24:53,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:53,597 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:24:53,597 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] [2022-11-16 11:24:53,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:53,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:53,798 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:24:53,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:53,798 INFO L85 PathProgramCache]: Analyzing trace with hash 836330979, now seen corresponding path program 21 times [2022-11-16 11:24:53,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:24:53,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366458801] [2022-11-16 11:24:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:53,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:24:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:54,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:24:54,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366458801] [2022-11-16 11:24:54,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366458801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:24:54,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931401007] [2022-11-16 11:24:54,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:24:54,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:24:54,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:24:54,137 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:24:54,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:24:54,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:24:54,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:54,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:24:54,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:54,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:55,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931401007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:55,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:24:55,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-16 11:24:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45967156] [2022-11-16 11:24:55,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:24:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:24:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:24:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:24:55,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:24:55,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 885 places, 2226 transitions, 80226 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:55,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:24:55,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:24:55,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:04,190 INFO L130 PetriNetUnfolder]: 1755/5392 cut-off events. [2022-11-16 11:25:04,190 INFO L131 PetriNetUnfolder]: For 363549/363561 co-relation queries the response was YES. [2022-11-16 11:25:04,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74805 conditions, 5392 events. 1755/5392 cut-off events. For 363549/363561 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 53240 event pairs, 104 based on Foata normal form. 10/5397 useless extension candidates. Maximal degree in co-relation 74575. Up to 1960 conditions per place. [2022-11-16 11:25:04,334 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 902 selfloop transitions, 1535 changer transitions 38/2516 dead transitions. [2022-11-16 11:25:04,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 939 places, 2516 transitions, 94127 flow [2022-11-16 11:25:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 11:25:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-16 11:25:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3573 transitions. [2022-11-16 11:25:04,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6391771019677996 [2022-11-16 11:25:04,342 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3573 transitions. [2022-11-16 11:25:04,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3573 transitions. [2022-11-16 11:25:04,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:04,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3573 transitions. [2022-11-16 11:25:04,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.96923076923077) internal successors, (3573), 65 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,357 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:04,357 INFO L175 Difference]: Start difference. First operand has 885 places, 2226 transitions, 80226 flow. Second operand 65 states and 3573 transitions. [2022-11-16 11:25:04,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 939 places, 2516 transitions, 94127 flow [2022-11-16 11:25:09,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 926 places, 2516 transitions, 93625 flow, removed 238 selfloop flow, removed 13 redundant places. [2022-11-16 11:25:09,190 INFO L231 Difference]: Finished difference. Result has 949 places, 2370 transitions, 91477 flow [2022-11-16 11:25:09,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=79740, PETRI_DIFFERENCE_MINUEND_PLACES=862, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=91477, PETRI_PLACES=949, PETRI_TRANSITIONS=2370} [2022-11-16 11:25:09,192 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 873 predicate places. [2022-11-16 11:25:09,192 INFO L495 AbstractCegarLoop]: Abstraction has has 949 places, 2370 transitions, 91477 flow [2022-11-16 11:25:09,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:09,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:09,192 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] [2022-11-16 11:25:09,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:09,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 11:25:09,393 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:25:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash 65660761, now seen corresponding path program 22 times [2022-11-16 11:25:09,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015896919] [2022-11-16 11:25:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:09,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:09,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:09,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015896919] [2022-11-16 11:25:09,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015896919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:09,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937970917] [2022-11-16 11:25:09,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:25:09,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:09,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:09,744 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:09,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:25:09,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:25:09,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:25:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:10,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:10,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937970917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:10,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:10,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-16 11:25:10,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208903888] [2022-11-16 11:25:10,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:10,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:25:10,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:25:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:25:10,730 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:25:10,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 949 places, 2370 transitions, 91477 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:10,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:10,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:25:10,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:21,933 INFO L130 PetriNetUnfolder]: 1805/5560 cut-off events. [2022-11-16 11:25:21,933 INFO L131 PetriNetUnfolder]: For 429834/429846 co-relation queries the response was YES. [2022-11-16 11:25:21,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81289 conditions, 5560 events. 1805/5560 cut-off events. For 429834/429846 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 55268 event pairs, 95 based on Foata normal form. 9/5555 useless extension candidates. Maximal degree in co-relation 81045. Up to 2354 conditions per place. [2022-11-16 11:25:22,063 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 1078 selfloop transitions, 1512 changer transitions 22/2653 dead transitions. [2022-11-16 11:25:22,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1011 places, 2653 transitions, 105718 flow [2022-11-16 11:25:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-16 11:25:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-11-16 11:25:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4001 transitions. [2022-11-16 11:25:22,068 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6373048741637464 [2022-11-16 11:25:22,068 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4001 transitions. [2022-11-16 11:25:22,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4001 transitions. [2022-11-16 11:25:22,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:22,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4001 transitions. [2022-11-16 11:25:22,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 54.80821917808219) internal successors, (4001), 73 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:22,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:22,081 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:22,081 INFO L175 Difference]: Start difference. First operand has 949 places, 2370 transitions, 91477 flow. Second operand 73 states and 4001 transitions. [2022-11-16 11:25:22,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1011 places, 2653 transitions, 105718 flow [2022-11-16 11:25:27,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 2653 transitions, 104535 flow, removed 516 selfloop flow, removed 18 redundant places. [2022-11-16 11:25:27,599 INFO L231 Difference]: Finished difference. Result has 1023 places, 2545 transitions, 102533 flow [2022-11-16 11:25:27,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=90479, PETRI_DIFFERENCE_MINUEND_PLACES=921, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=102533, PETRI_PLACES=1023, PETRI_TRANSITIONS=2545} [2022-11-16 11:25:27,602 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 947 predicate places. [2022-11-16 11:25:27,602 INFO L495 AbstractCegarLoop]: Abstraction has has 1023 places, 2545 transitions, 102533 flow [2022-11-16 11:25:27,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:27,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:27,602 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] [2022-11-16 11:25:27,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:27,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:25:27,808 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:25:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1240584633, now seen corresponding path program 23 times [2022-11-16 11:25:27,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:27,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493380422] [2022-11-16 11:25:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:27,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:28,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:28,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493380422] [2022-11-16 11:25:28,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493380422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:28,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914996336] [2022-11-16 11:25:28,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:25:28,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:28,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:28,138 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:28,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:25:28,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:25:28,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:25:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:28,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:29,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914996336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:29,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:29,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-16 11:25:29,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145656558] [2022-11-16 11:25:29,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:29,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:25:29,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:25:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:25:29,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:25:29,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1023 places, 2545 transitions, 102533 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:29,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:29,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:25:29,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:39,438 INFO L130 PetriNetUnfolder]: 1803/5518 cut-off events. [2022-11-16 11:25:39,439 INFO L131 PetriNetUnfolder]: For 488755/488760 co-relation queries the response was YES. [2022-11-16 11:25:39,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84925 conditions, 5518 events. 1803/5518 cut-off events. For 488755/488760 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 54571 event pairs, 82 based on Foata normal form. 8/5511 useless extension candidates. Maximal degree in co-relation 84669. Up to 1815 conditions per place. [2022-11-16 11:25:39,550 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 956 selfloop transitions, 1657 changer transitions 38/2692 dead transitions. [2022-11-16 11:25:39,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1077 places, 2692 transitions, 112143 flow [2022-11-16 11:25:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 11:25:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-16 11:25:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3577 transitions. [2022-11-16 11:25:39,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6398926654740609 [2022-11-16 11:25:39,554 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3577 transitions. [2022-11-16 11:25:39,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3577 transitions. [2022-11-16 11:25:39,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:39,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3577 transitions. [2022-11-16 11:25:39,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 55.03076923076923) internal successors, (3577), 65 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:39,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:39,564 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:39,564 INFO L175 Difference]: Start difference. First operand has 1023 places, 2545 transitions, 102533 flow. Second operand 65 states and 3577 transitions. [2022-11-16 11:25:39,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1077 places, 2692 transitions, 112143 flow [2022-11-16 11:25:45,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1050 places, 2692 transitions, 110751 flow, removed 645 selfloop flow, removed 27 redundant places. [2022-11-16 11:25:45,731 INFO L231 Difference]: Finished difference. Result has 1063 places, 2534 transitions, 104590 flow [2022-11-16 11:25:45,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=101505, PETRI_DIFFERENCE_MINUEND_PLACES=986, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=104590, PETRI_PLACES=1063, PETRI_TRANSITIONS=2534} [2022-11-16 11:25:45,733 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 987 predicate places. [2022-11-16 11:25:45,733 INFO L495 AbstractCegarLoop]: Abstraction has has 1063 places, 2534 transitions, 104590 flow [2022-11-16 11:25:45,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:45,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:45,734 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] [2022-11-16 11:25:45,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:45,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:25:45,934 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:25:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash -21380387, now seen corresponding path program 24 times [2022-11-16 11:25:45,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:45,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762147342] [2022-11-16 11:25:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:45,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:46,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:46,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762147342] [2022-11-16 11:25:46,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762147342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:25:46,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667554371] [2022-11-16 11:25:46,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:25:46,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:25:46,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:46,368 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:25:46,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:25:46,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:25:46,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:46,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:25:46,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:46,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:47,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667554371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:47,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:25:47,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-16 11:25:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493892974] [2022-11-16 11:25:47,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:47,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:25:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:25:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:25:47,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:25:47,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1063 places, 2534 transitions, 104590 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:47,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:47,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:25:47,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:55,309 INFO L130 PetriNetUnfolder]: 1813/5471 cut-off events. [2022-11-16 11:25:55,309 INFO L131 PetriNetUnfolder]: For 488017/488029 co-relation queries the response was YES. [2022-11-16 11:25:55,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86715 conditions, 5471 events. 1813/5471 cut-off events. For 488017/488029 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 53586 event pairs, 84 based on Foata normal form. 6/5463 useless extension candidates. Maximal degree in co-relation 86455. Up to 2616 conditions per place. [2022-11-16 11:25:55,443 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 1166 selfloop transitions, 1490 changer transitions 9/2706 dead transitions. [2022-11-16 11:25:55,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1088 places, 2706 transitions, 115105 flow [2022-11-16 11:25:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:25:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-16 11:25:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2096 transitions. [2022-11-16 11:25:55,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6413708690330477 [2022-11-16 11:25:55,446 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2096 transitions. [2022-11-16 11:25:55,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2096 transitions. [2022-11-16 11:25:55,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:55,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2096 transitions. [2022-11-16 11:25:55,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.1578947368421) internal successors, (2096), 38 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:55,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:55,452 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:55,452 INFO L175 Difference]: Start difference. First operand has 1063 places, 2534 transitions, 104590 flow. Second operand 38 states and 2096 transitions. [2022-11-16 11:25:55,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1088 places, 2706 transitions, 115105 flow [2022-11-16 11:26:01,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1035 places, 2706 transitions, 112320 flow, removed 105 selfloop flow, removed 53 redundant places. [2022-11-16 11:26:01,641 INFO L231 Difference]: Finished difference. Result has 1047 places, 2632 transitions, 108869 flow [2022-11-16 11:26:01,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=101941, PETRI_DIFFERENCE_MINUEND_PLACES=998, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=108869, PETRI_PLACES=1047, PETRI_TRANSITIONS=2632} [2022-11-16 11:26:01,644 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 971 predicate places. [2022-11-16 11:26:01,644 INFO L495 AbstractCegarLoop]: Abstraction has has 1047 places, 2632 transitions, 108869 flow [2022-11-16 11:26:01,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:01,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:01,645 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] [2022-11-16 11:26:01,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:26:01,851 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:26:01,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:01,851 INFO L85 PathProgramCache]: Analyzing trace with hash -87113171, now seen corresponding path program 25 times [2022-11-16 11:26:01,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:01,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448423092] [2022-11-16 11:26:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:02,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:02,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448423092] [2022-11-16 11:26:02,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448423092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:02,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112930081] [2022-11-16 11:26:02,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:26:02,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:02,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:02,212 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:02,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0b8c21-0512-49c1-a539-ef5694ee3309/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:26:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:02,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:26:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:02,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:03,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112930081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:03,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:03,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-16 11:26:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817186522] [2022-11-16 11:26:03,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:03,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:26:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:26:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:26:03,152 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-16 11:26:03,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 2632 transitions, 108869 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:03,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:03,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-16 11:26:03,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:12,941 INFO L130 PetriNetUnfolder]: 1894/5767 cut-off events. [2022-11-16 11:26:12,941 INFO L131 PetriNetUnfolder]: For 503551/503556 co-relation queries the response was YES. [2022-11-16 11:26:13,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92062 conditions, 5767 events. 1894/5767 cut-off events. For 503551/503556 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 57487 event pairs, 85 based on Foata normal form. 6/5759 useless extension candidates. Maximal degree in co-relation 91802. Up to 2735 conditions per place. [2022-11-16 11:26:13,061 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 1218 selfloop transitions, 1618 changer transitions 15/2892 dead transitions. [2022-11-16 11:26:13,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1095 places, 2892 transitions, 124477 flow [2022-11-16 11:26:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 11:26:13,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-16 11:26:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2847 transitions. [2022-11-16 11:26:13,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6366279069767442 [2022-11-16 11:26:13,064 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2847 transitions. [2022-11-16 11:26:13,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2847 transitions. [2022-11-16 11:26:13,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:13,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2847 transitions. [2022-11-16 11:26:13,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.75) internal successors, (2847), 52 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:13,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:13,071 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:13,071 INFO L175 Difference]: Start difference. First operand has 1047 places, 2632 transitions, 108869 flow. Second operand 52 states and 2847 transitions. [2022-11-16 11:26:13,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1095 places, 2892 transitions, 124477 flow