./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.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_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/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_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/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_9d9c723c-b127-41e2-8db5-9d01d78fe111/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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --- 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 11:45:45,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:45:45,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:45:45,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:45:45,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:45:45,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:45:45,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:45:45,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:45:45,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:45:45,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:45:45,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:45:45,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:45:45,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:45:45,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:45:45,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:45:45,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:45:45,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:45:45,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:45:45,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:45:45,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:45:45,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:45:45,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:45:45,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:45:45,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:45:45,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:45:45,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:45:45,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:45:45,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:45:45,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:45:45,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:45:45,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:45:45,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:45:45,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:45:45,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:45:45,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:45:45,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:45:45,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:45:45,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:45:45,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:45:45,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:45:45,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:45:45,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:45:45,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:45:45,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:45:45,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:45:45,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:45:45,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:45:45,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:45:45,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:45:45,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:45:45,468 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:45:45,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:45:45,469 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:45:45,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:45:45,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:45:45,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:45:45,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:45:45,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:45:45,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:45:45,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:45:45,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:45:45,471 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:45:45,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:45:45,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:45:45,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:45:45,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:45:45,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:45:45,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:45:45,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:45:45,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:45:45,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:45:45,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:45:45,474 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:45:45,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:45:45,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:45:45,474 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_9d9c723c-b127-41e2-8db5-9d01d78fe111/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 [2022-11-16 11:45:45,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:45:45,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:45:45,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:45:45,856 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:45:45,856 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:45:45,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-16 11:45:45,942 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/data/347f2889c/c2bd5868686a4d44a9389eee30aae6fd/FLAG9a4b87163 [2022-11-16 11:45:46,471 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:45:46,472 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-11-16 11:45:46,489 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/data/347f2889c/c2bd5868686a4d44a9389eee30aae6fd/FLAG9a4b87163 [2022-11-16 11:45:46,824 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/data/347f2889c/c2bd5868686a4d44a9389eee30aae6fd [2022-11-16 11:45:46,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:45:46,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:45:46,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:45:46,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:45:46,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:45:46,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:45:46" (1/1) ... [2022-11-16 11:45:46,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b72cfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:46, skipping insertion in model container [2022-11-16 11:45:46,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:45:46" (1/1) ... [2022-11-16 11:45:46,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:45:46,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:45:47,235 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_9d9c723c-b127-41e2-8db5-9d01d78fe111/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-16 11:45:47,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:45:47,272 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:45:47,322 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_9d9c723c-b127-41e2-8db5-9d01d78fe111/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-11-16 11:45:47,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:45:47,353 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:45:47,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47 WrapperNode [2022-11-16 11:45:47,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:45:47,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:45:47,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:45:47,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:45:47,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,428 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 277 [2022-11-16 11:45:47,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:45:47,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:45:47,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:45:47,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:45:47,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,460 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:45:47,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:45:47,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:45:47,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:45:47,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (1/1) ... [2022-11-16 11:45:47,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:45:47,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:47,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:45:47,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:45:47,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:45:47,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:45:47,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:45:47,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:45:47,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:45:47,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:45:47,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:45:47,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:45:47,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:45:47,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:45:47,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:45:47,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:45:47,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:45:47,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:45:47,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:45:47,580 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 11:45:47,728 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:45:47,731 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:45:48,353 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:45:48,371 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:45:48,371 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:45:48,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:45:48 BoogieIcfgContainer [2022-11-16 11:45:48,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:45:48,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:45:48,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:45:48,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:45:48,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:45:46" (1/3) ... [2022-11-16 11:45:48,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f330664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:45:48, skipping insertion in model container [2022-11-16 11:45:48,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:47" (2/3) ... [2022-11-16 11:45:48,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f330664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:45:48, skipping insertion in model container [2022-11-16 11:45:48,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:45:48" (3/3) ... [2022-11-16 11:45:48,387 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2022-11-16 11:45:48,398 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:45:48,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:45:48,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:45:48,412 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:45:48,560 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:45:48,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 350 transitions, 724 flow [2022-11-16 11:45:48,835 INFO L130 PetriNetUnfolder]: 28/347 cut-off events. [2022-11-16 11:45:48,836 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:45:48,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 28/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 583 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 269. Up to 3 conditions per place. [2022-11-16 11:45:48,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 350 transitions, 724 flow [2022-11-16 11:45:48,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 336 transitions, 690 flow [2022-11-16 11:45:48,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:45:48,902 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;@498b0968, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:45:48,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-16 11:45:49,032 INFO L130 PetriNetUnfolder]: 27/332 cut-off events. [2022-11-16 11:45:49,033 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:45:49,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:49,034 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:49,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:45:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 845810423, now seen corresponding path program 1 times [2022-11-16 11:45:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:49,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447297422] [2022-11-16 11:45:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:49,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:49,427 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 11:45:49,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:49,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447297422] [2022-11-16 11:45:49,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447297422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:49,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:49,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:45:49,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87762141] [2022-11-16 11:45:49,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:49,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:45:49,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:45:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:45:49,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 350 [2022-11-16 11:45:49,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 336 transitions, 690 flow. Second operand has 2 states, 2 states have (on average 330.0) internal successors, (660), 2 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 11:45:49,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:49,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 350 [2022-11-16 11:45:49,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:49,594 INFO L130 PetriNetUnfolder]: 9/317 cut-off events. [2022-11-16 11:45:49,595 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-16 11:45:49,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 317 events. 9/317 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 562 event pairs, 0 based on Foata normal form. 25/320 useless extension candidates. Maximal degree in co-relation 256. Up to 7 conditions per place. [2022-11-16 11:45:49,600 INFO L137 encePairwiseOnDemand]: 331/350 looper letters, 6 selfloop transitions, 0 changer transitions 7/317 dead transitions. [2022-11-16 11:45:49,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 317 transitions, 664 flow [2022-11-16 11:45:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:45:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:45:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 673 transitions. [2022-11-16 11:45:49,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9614285714285714 [2022-11-16 11:45:49,627 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 673 transitions. [2022-11-16 11:45:49,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 673 transitions. [2022-11-16 11:45:49,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:49,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 673 transitions. [2022-11-16 11:45:49,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 336.5) internal successors, (673), 2 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 11:45:49,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 11:45:49,655 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 11:45:49,657 INFO L175 Difference]: Start difference. First operand has 318 places, 336 transitions, 690 flow. Second operand 2 states and 673 transitions. [2022-11-16 11:45:49,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 317 transitions, 664 flow [2022-11-16 11:45:49,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 317 transitions, 652 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 11:45:49,675 INFO L231 Difference]: Finished difference. Result has 313 places, 310 transitions, 626 flow [2022-11-16 11:45:49,678 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=626, PETRI_PLACES=313, PETRI_TRANSITIONS=310} [2022-11-16 11:45:49,689 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, -5 predicate places. [2022-11-16 11:45:49,690 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 310 transitions, 626 flow [2022-11-16 11:45:49,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 330.0) internal successors, (660), 2 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 11:45:49,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:49,692 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:49,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:45:49,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:45:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:49,695 INFO L85 PathProgramCache]: Analyzing trace with hash 833383285, now seen corresponding path program 1 times [2022-11-16 11:45:49,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:49,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453342961] [2022-11-16 11:45:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:49,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:50,963 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 11:45:50,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:50,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453342961] [2022-11-16 11:45:50,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453342961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:50,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:50,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 11:45:50,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959037678] [2022-11-16 11:45:50,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:50,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:45:50,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:45:50,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:45:50,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 350 [2022-11-16 11:45:50,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 310 transitions, 626 flow. Second operand has 14 states, 14 states have (on average 248.5) internal successors, (3479), 14 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states 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 11:45:50,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:50,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 350 [2022-11-16 11:45:50,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:52,981 INFO L130 PetriNetUnfolder]: 535/4795 cut-off events. [2022-11-16 11:45:52,981 INFO L131 PetriNetUnfolder]: For 63/74 co-relation queries the response was YES. [2022-11-16 11:45:53,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5595 conditions, 4795 events. 535/4795 cut-off events. For 63/74 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 47999 event pairs, 282 based on Foata normal form. 1/4297 useless extension candidates. Maximal degree in co-relation 5592. Up to 265 conditions per place. [2022-11-16 11:45:53,035 INFO L137 encePairwiseOnDemand]: 328/350 looper letters, 135 selfloop transitions, 21 changer transitions 6/393 dead transitions. [2022-11-16 11:45:53,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 393 transitions, 1129 flow [2022-11-16 11:45:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:45:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:45:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5287 transitions. [2022-11-16 11:45:53,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7193197278911565 [2022-11-16 11:45:53,053 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5287 transitions. [2022-11-16 11:45:53,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5287 transitions. [2022-11-16 11:45:53,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:53,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5287 transitions. [2022-11-16 11:45:53,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 251.76190476190476) internal successors, (5287), 21 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states 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 11:45:53,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 350.0) internal successors, (7700), 22 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states 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 11:45:53,100 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 350.0) internal successors, (7700), 22 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states 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 11:45:53,100 INFO L175 Difference]: Start difference. First operand has 313 places, 310 transitions, 626 flow. Second operand 21 states and 5287 transitions. [2022-11-16 11:45:53,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 393 transitions, 1129 flow [2022-11-16 11:45:53,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 393 transitions, 1129 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:45:53,116 INFO L231 Difference]: Finished difference. Result has 337 places, 322 transitions, 741 flow [2022-11-16 11:45:53,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=741, PETRI_PLACES=337, PETRI_TRANSITIONS=322} [2022-11-16 11:45:53,118 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 19 predicate places. [2022-11-16 11:45:53,118 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 322 transitions, 741 flow [2022-11-16 11:45:53,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 248.5) internal successors, (3479), 14 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states 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 11:45:53,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:53,123 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:53,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:45:53,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:45:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1952499687, now seen corresponding path program 1 times [2022-11-16 11:45:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:53,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374018389] [2022-11-16 11:45:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:53,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:53,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374018389] [2022-11-16 11:45:53,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374018389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:53,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826938262] [2022-11-16 11:45:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:53,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:53,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:53,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:53,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:45:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:45:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:54,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:55,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826938262] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:55,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:45:55,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15, 13] total 28 [2022-11-16 11:45:55,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91488313] [2022-11-16 11:45:55,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:55,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:45:55,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:55,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:45:55,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:45:55,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 350 [2022-11-16 11:45:55,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 322 transitions, 741 flow. Second operand has 13 states, 13 states have (on average 249.15384615384616) internal successors, (3239), 13 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states 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 11:45:55,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:55,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 350 [2022-11-16 11:45:55,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:57,514 INFO L130 PetriNetUnfolder]: 769/6628 cut-off events. [2022-11-16 11:45:57,514 INFO L131 PetriNetUnfolder]: For 214/214 co-relation queries the response was YES. [2022-11-16 11:45:57,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7957 conditions, 6628 events. 769/6628 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 71576 event pairs, 440 based on Foata normal form. 1/5938 useless extension candidates. Maximal degree in co-relation 7942. Up to 361 conditions per place. [2022-11-16 11:45:57,599 INFO L137 encePairwiseOnDemand]: 328/350 looper letters, 142 selfloop transitions, 26 changer transitions 4/404 dead transitions. [2022-11-16 11:45:57,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 404 transitions, 1286 flow [2022-11-16 11:45:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:45:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 11:45:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4320 transitions. [2022-11-16 11:45:57,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7260504201680672 [2022-11-16 11:45:57,611 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4320 transitions. [2022-11-16 11:45:57,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4320 transitions. [2022-11-16 11:45:57,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:57,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4320 transitions. [2022-11-16 11:45:57,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 254.11764705882354) internal successors, (4320), 17 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states 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 11:45:57,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 350.0) internal successors, (6300), 18 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states 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 11:45:57,639 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 350.0) internal successors, (6300), 18 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states 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 11:45:57,639 INFO L175 Difference]: Start difference. First operand has 337 places, 322 transitions, 741 flow. Second operand 17 states and 4320 transitions. [2022-11-16 11:45:57,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 404 transitions, 1286 flow [2022-11-16 11:45:57,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 404 transitions, 1262 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-11-16 11:45:57,652 INFO L231 Difference]: Finished difference. Result has 352 places, 335 transitions, 847 flow [2022-11-16 11:45:57,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=847, PETRI_PLACES=352, PETRI_TRANSITIONS=335} [2022-11-16 11:45:57,656 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 34 predicate places. [2022-11-16 11:45:57,656 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 335 transitions, 847 flow [2022-11-16 11:45:57,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 249.15384615384616) internal successors, (3239), 13 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states 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 11:45:57,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:57,659 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:57,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:57,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:57,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:45:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1970543654, now seen corresponding path program 1 times [2022-11-16 11:45:57,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:57,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25422177] [2022-11-16 11:45:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:57,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:58,398 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 11:45:58,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:58,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25422177] [2022-11-16 11:45:58,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25422177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:58,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298609288] [2022-11-16 11:45:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:58,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:58,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:58,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:58,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:45:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:58,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:45:58,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:59,224 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 11:45:59,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:59,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298609288] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:59,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:45:59,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-16 11:45:59,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227124102] [2022-11-16 11:45:59,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:59,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:45:59,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:59,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:45:59,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:45:59,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 350 [2022-11-16 11:46:00,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 335 transitions, 847 flow. Second operand has 11 states, 11 states have (on average 272.45454545454544) internal successors, (2997), 11 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states 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 11:46:00,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:00,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 350 [2022-11-16 11:46:00,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:02,194 INFO L130 PetriNetUnfolder]: 1309/6750 cut-off events. [2022-11-16 11:46:02,195 INFO L131 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-11-16 11:46:02,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9332 conditions, 6750 events. 1309/6750 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 68240 event pairs, 498 based on Foata normal form. 0/5934 useless extension candidates. Maximal degree in co-relation 9313. Up to 446 conditions per place. [2022-11-16 11:46:02,275 INFO L137 encePairwiseOnDemand]: 332/350 looper letters, 137 selfloop transitions, 25 changer transitions 1/415 dead transitions. [2022-11-16 11:46:02,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 415 transitions, 1364 flow [2022-11-16 11:46:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:46:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:46:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4987 transitions. [2022-11-16 11:46:02,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7915873015873016 [2022-11-16 11:46:02,287 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4987 transitions. [2022-11-16 11:46:02,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4987 transitions. [2022-11-16 11:46:02,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:02,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4987 transitions. [2022-11-16 11:46:02,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 277.05555555555554) internal successors, (4987), 18 states have internal predecessors, (4987), 0 states have call successors, (0), 0 states 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 11:46:02,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 350.0) internal successors, (6650), 19 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states 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 11:46:02,319 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 350.0) internal successors, (6650), 19 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states 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 11:46:02,320 INFO L175 Difference]: Start difference. First operand has 352 places, 335 transitions, 847 flow. Second operand 18 states and 4987 transitions. [2022-11-16 11:46:02,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 415 transitions, 1364 flow [2022-11-16 11:46:02,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 415 transitions, 1347 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-16 11:46:02,333 INFO L231 Difference]: Finished difference. Result has 362 places, 341 transitions, 905 flow [2022-11-16 11:46:02,334 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=905, PETRI_PLACES=362, PETRI_TRANSITIONS=341} [2022-11-16 11:46:02,335 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 44 predicate places. [2022-11-16 11:46:02,335 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 341 transitions, 905 flow [2022-11-16 11:46:02,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 272.45454545454544) internal successors, (2997), 11 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states 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 11:46:02,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:02,337 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:02,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:02,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:02,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:46:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:02,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1948689133, now seen corresponding path program 1 times [2022-11-16 11:46:02,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:02,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850180956] [2022-11-16 11:46:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:02,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:46:03,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:03,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850180956] [2022-11-16 11:46:03,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850180956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:03,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430094376] [2022-11-16 11:46:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:03,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:03,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:03,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:03,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:46:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:46:03,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:46:03,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:46:04,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430094376] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:04,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:46:04,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14, 13] total 28 [2022-11-16 11:46:04,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464266695] [2022-11-16 11:46:04,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:04,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:46:04,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:04,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:46:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:46:04,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 350 [2022-11-16 11:46:04,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 341 transitions, 905 flow. Second operand has 13 states, 13 states have (on average 249.53846153846155) internal successors, (3244), 13 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states 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 11:46:04,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:04,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 350 [2022-11-16 11:46:04,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:09,004 INFO L130 PetriNetUnfolder]: 1740/17144 cut-off events. [2022-11-16 11:46:09,004 INFO L131 PetriNetUnfolder]: For 1497/1513 co-relation queries the response was YES. [2022-11-16 11:46:09,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21589 conditions, 17144 events. 1740/17144 cut-off events. For 1497/1513 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 228250 event pairs, 822 based on Foata normal form. 12/15549 useless extension candidates. Maximal degree in co-relation 21570. Up to 865 conditions per place. [2022-11-16 11:46:09,182 INFO L137 encePairwiseOnDemand]: 325/350 looper letters, 170 selfloop transitions, 49 changer transitions 5/460 dead transitions. [2022-11-16 11:46:09,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 460 transitions, 1790 flow [2022-11-16 11:46:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:46:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 11:46:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 6027 transitions. [2022-11-16 11:46:09,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7175 [2022-11-16 11:46:09,200 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 6027 transitions. [2022-11-16 11:46:09,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 6027 transitions. [2022-11-16 11:46:09,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:09,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 6027 transitions. [2022-11-16 11:46:09,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 251.125) internal successors, (6027), 24 states have internal predecessors, (6027), 0 states have call successors, (0), 0 states 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 11:46:09,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 350.0) internal successors, (8750), 25 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states 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 11:46:09,243 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 350.0) internal successors, (8750), 25 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states 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 11:46:09,243 INFO L175 Difference]: Start difference. First operand has 362 places, 341 transitions, 905 flow. Second operand 24 states and 6027 transitions. [2022-11-16 11:46:09,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 460 transitions, 1790 flow [2022-11-16 11:46:09,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 460 transitions, 1737 flow, removed 4 selfloop flow, removed 9 redundant places. [2022-11-16 11:46:09,262 INFO L231 Difference]: Finished difference. Result has 384 places, 365 transitions, 1159 flow [2022-11-16 11:46:09,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1159, PETRI_PLACES=384, PETRI_TRANSITIONS=365} [2022-11-16 11:46:09,264 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 66 predicate places. [2022-11-16 11:46:09,264 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 365 transitions, 1159 flow [2022-11-16 11:46:09,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 249.53846153846155) internal successors, (3244), 13 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states 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 11:46:09,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:09,266 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:09,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:09,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:09,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:46:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash -176297371, now seen corresponding path program 1 times [2022-11-16 11:46:09,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:09,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074055446] [2022-11-16 11:46:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:09,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:46:10,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074055446] [2022-11-16 11:46:10,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074055446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229609251] [2022-11-16 11:46:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:10,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:10,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:10,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:10,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:46:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:10,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:46:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:46:10,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:46:11,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229609251] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:11,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:46:11,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-16 11:46:11,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243981373] [2022-11-16 11:46:11,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:11,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:46:11,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:11,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:46:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:46:11,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 350 [2022-11-16 11:46:11,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 365 transitions, 1159 flow. Second operand has 11 states, 11 states have (on average 272.90909090909093) internal successors, (3002), 11 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states 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 11:46:11,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:11,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 350 [2022-11-16 11:46:11,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:17,537 INFO L130 PetriNetUnfolder]: 3407/29586 cut-off events. [2022-11-16 11:46:17,537 INFO L131 PetriNetUnfolder]: For 2934/2948 co-relation queries the response was YES. [2022-11-16 11:46:17,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38344 conditions, 29586 events. 3407/29586 cut-off events. For 2934/2948 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 435898 event pairs, 1801 based on Foata normal form. 6/26989 useless extension candidates. Maximal degree in co-relation 38318. Up to 1110 conditions per place. [2022-11-16 11:46:17,878 INFO L137 encePairwiseOnDemand]: 332/350 looper letters, 180 selfloop transitions, 30 changer transitions 3/469 dead transitions. [2022-11-16 11:46:17,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 469 transitions, 1901 flow [2022-11-16 11:46:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:46:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 11:46:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5273 transitions. [2022-11-16 11:46:17,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7929323308270677 [2022-11-16 11:46:17,892 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5273 transitions. [2022-11-16 11:46:17,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5273 transitions. [2022-11-16 11:46:17,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:17,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5273 transitions. [2022-11-16 11:46:17,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 277.5263157894737) internal successors, (5273), 19 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states 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 11:46:17,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 11:46:17,923 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 11:46:17,924 INFO L175 Difference]: Start difference. First operand has 384 places, 365 transitions, 1159 flow. Second operand 19 states and 5273 transitions. [2022-11-16 11:46:17,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 469 transitions, 1901 flow [2022-11-16 11:46:17,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 469 transitions, 1884 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-16 11:46:17,948 INFO L231 Difference]: Finished difference. Result has 396 places, 372 transitions, 1236 flow [2022-11-16 11:46:17,949 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1236, PETRI_PLACES=396, PETRI_TRANSITIONS=372} [2022-11-16 11:46:17,950 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 78 predicate places. [2022-11-16 11:46:17,950 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 372 transitions, 1236 flow [2022-11-16 11:46:17,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 272.90909090909093) internal successors, (3002), 11 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states 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 11:46:17,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:17,951 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:17,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:18,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:46:18,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:46:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash 133748198, now seen corresponding path program 1 times [2022-11-16 11:46:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:18,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570302598] [2022-11-16 11:46:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:18,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:18,376 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 11:46:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570302598] [2022-11-16 11:46:18,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570302598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:46:18,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:46:18,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:46:18,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359027970] [2022-11-16 11:46:18,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:18,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:46:18,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:46:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:46:18,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 350 [2022-11-16 11:46:18,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 372 transitions, 1236 flow. Second operand has 7 states, 7 states have (on average 278.85714285714283) internal successors, (1952), 7 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states 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 11:46:18,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:18,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 350 [2022-11-16 11:46:18,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:19,845 INFO L130 PetriNetUnfolder]: 420/5273 cut-off events. [2022-11-16 11:46:19,845 INFO L131 PetriNetUnfolder]: For 1039/1264 co-relation queries the response was YES. [2022-11-16 11:46:20,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7364 conditions, 5273 events. 420/5273 cut-off events. For 1039/1264 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 52162 event pairs, 254 based on Foata normal form. 22/4941 useless extension candidates. Maximal degree in co-relation 7337. Up to 697 conditions per place. [2022-11-16 11:46:20,024 INFO L137 encePairwiseOnDemand]: 339/350 looper letters, 73 selfloop transitions, 8 changer transitions 55/395 dead transitions. [2022-11-16 11:46:20,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 395 transitions, 1563 flow [2022-11-16 11:46:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:46:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:46:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2834 transitions. [2022-11-16 11:46:20,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8097142857142857 [2022-11-16 11:46:20,034 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2834 transitions. [2022-11-16 11:46:20,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2834 transitions. [2022-11-16 11:46:20,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:20,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2834 transitions. [2022-11-16 11:46:20,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 283.4) internal successors, (2834), 10 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states 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 11:46:20,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 350.0) internal successors, (3850), 11 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states 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 11:46:20,050 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 350.0) internal successors, (3850), 11 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states 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 11:46:20,051 INFO L175 Difference]: Start difference. First operand has 396 places, 372 transitions, 1236 flow. Second operand 10 states and 2834 transitions. [2022-11-16 11:46:20,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 395 transitions, 1563 flow [2022-11-16 11:46:20,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 395 transitions, 1520 flow, removed 3 selfloop flow, removed 11 redundant places. [2022-11-16 11:46:20,066 INFO L231 Difference]: Finished difference. Result has 393 places, 338 transitions, 1002 flow [2022-11-16 11:46:20,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1002, PETRI_PLACES=393, PETRI_TRANSITIONS=338} [2022-11-16 11:46:20,067 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 75 predicate places. [2022-11-16 11:46:20,068 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 338 transitions, 1002 flow [2022-11-16 11:46:20,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 278.85714285714283) internal successors, (1952), 7 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states 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 11:46:20,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:20,069 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:46:20,070 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:46:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2045442764, now seen corresponding path program 1 times [2022-11-16 11:46:20,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:20,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683557392] [2022-11-16 11:46:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:46:20,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:20,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683557392] [2022-11-16 11:46:20,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683557392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:20,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124407426] [2022-11-16 11:46:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:20,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:20,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:20,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:20,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:46:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:46:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:46:21,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:46:21,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124407426] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:21,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:46:21,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-16 11:46:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935232381] [2022-11-16 11:46:21,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:21,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:46:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:46:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:46:21,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 350 [2022-11-16 11:46:21,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 338 transitions, 1002 flow. Second operand has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states 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 11:46:21,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:21,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 350 [2022-11-16 11:46:21,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:26,045 INFO L130 PetriNetUnfolder]: 2358/18412 cut-off events. [2022-11-16 11:46:26,046 INFO L131 PetriNetUnfolder]: For 3396/3816 co-relation queries the response was YES. [2022-11-16 11:46:26,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25584 conditions, 18412 events. 2358/18412 cut-off events. For 3396/3816 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 243406 event pairs, 1208 based on Foata normal form. 67/17003 useless extension candidates. Maximal degree in co-relation 25557. Up to 950 conditions per place. [2022-11-16 11:46:26,214 INFO L137 encePairwiseOnDemand]: 333/350 looper letters, 146 selfloop transitions, 24 changer transitions 0/424 dead transitions. [2022-11-16 11:46:26,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 424 transitions, 1632 flow [2022-11-16 11:46:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:46:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 11:46:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5246 transitions. [2022-11-16 11:46:26,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7888721804511278 [2022-11-16 11:46:26,227 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5246 transitions. [2022-11-16 11:46:26,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5246 transitions. [2022-11-16 11:46:26,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:26,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5246 transitions. [2022-11-16 11:46:26,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 276.10526315789474) internal successors, (5246), 19 states have internal predecessors, (5246), 0 states have call successors, (0), 0 states 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 11:46:26,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 11:46:26,262 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 350.0) internal successors, (7000), 20 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states 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 11:46:26,263 INFO L175 Difference]: Start difference. First operand has 393 places, 338 transitions, 1002 flow. Second operand 19 states and 5246 transitions. [2022-11-16 11:46:26,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 424 transitions, 1632 flow [2022-11-16 11:46:26,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 424 transitions, 1529 flow, removed 5 selfloop flow, removed 27 redundant places. [2022-11-16 11:46:26,286 INFO L231 Difference]: Finished difference. Result has 372 places, 344 transitions, 982 flow [2022-11-16 11:46:26,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=982, PETRI_PLACES=372, PETRI_TRANSITIONS=344} [2022-11-16 11:46:26,288 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 54 predicate places. [2022-11-16 11:46:26,288 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 344 transitions, 982 flow [2022-11-16 11:46:26,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 273.0) internal successors, (3003), 11 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states 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 11:46:26,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:26,290 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:26,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:26,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:46:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash -329651488, now seen corresponding path program 1 times [2022-11-16 11:46:26,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:26,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925595826] [2022-11-16 11:46:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:26,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:26,785 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 11:46:26,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:26,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925595826] [2022-11-16 11:46:26,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925595826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:46:26,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:46:26,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:46:26,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628828150] [2022-11-16 11:46:26,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:26,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:46:26,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:46:26,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:46:26,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 350 [2022-11-16 11:46:26,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 344 transitions, 982 flow. Second operand has 7 states, 7 states have (on average 279.42857142857144) internal successors, (1956), 7 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states 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 11:46:26,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:26,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 350 [2022-11-16 11:46:26,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:27,924 INFO L130 PetriNetUnfolder]: 668/4273 cut-off events. [2022-11-16 11:46:27,925 INFO L131 PetriNetUnfolder]: For 1236/1259 co-relation queries the response was YES. [2022-11-16 11:46:27,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6570 conditions, 4273 events. 668/4273 cut-off events. For 1236/1259 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 39464 event pairs, 456 based on Foata normal form. 35/3897 useless extension candidates. Maximal degree in co-relation 6552. Up to 902 conditions per place. [2022-11-16 11:46:27,956 INFO L137 encePairwiseOnDemand]: 341/350 looper letters, 68 selfloop transitions, 10 changer transitions 24/362 dead transitions. [2022-11-16 11:46:27,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 362 transitions, 1248 flow [2022-11-16 11:46:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:46:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:46:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2264 transitions. [2022-11-16 11:46:27,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8085714285714286 [2022-11-16 11:46:27,961 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2264 transitions. [2022-11-16 11:46:27,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2264 transitions. [2022-11-16 11:46:27,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:27,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2264 transitions. [2022-11-16 11:46:27,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states 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 11:46:27,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 350.0) internal successors, (3150), 9 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states 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 11:46:27,973 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 350.0) internal successors, (3150), 9 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states 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 11:46:27,974 INFO L175 Difference]: Start difference. First operand has 372 places, 344 transitions, 982 flow. Second operand 8 states and 2264 transitions. [2022-11-16 11:46:27,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 362 transitions, 1248 flow [2022-11-16 11:46:27,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 362 transitions, 1205 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-11-16 11:46:27,986 INFO L231 Difference]: Finished difference. Result has 365 places, 336 transitions, 927 flow [2022-11-16 11:46:27,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=927, PETRI_PLACES=365, PETRI_TRANSITIONS=336} [2022-11-16 11:46:27,988 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 47 predicate places. [2022-11-16 11:46:27,988 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 336 transitions, 927 flow [2022-11-16 11:46:27,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 279.42857142857144) internal successors, (1956), 7 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states 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 11:46:27,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:27,989 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:27,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:46:27,990 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:46:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:27,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1428622809, now seen corresponding path program 1 times [2022-11-16 11:46:27,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:27,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123786628] [2022-11-16 11:46:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:27,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:28,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123786628] [2022-11-16 11:46:28,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123786628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:46:28,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:46:28,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:46:28,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815857872] [2022-11-16 11:46:28,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:28,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:46:28,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:28,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:46:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:46:28,423 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 350 [2022-11-16 11:46:28,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 336 transitions, 927 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 11:46:28,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:28,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 350 [2022-11-16 11:46:28,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:30,142 INFO L130 PetriNetUnfolder]: 1327/9214 cut-off events. [2022-11-16 11:46:30,142 INFO L131 PetriNetUnfolder]: For 2216/2300 co-relation queries the response was YES. [2022-11-16 11:46:30,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13460 conditions, 9214 events. 1327/9214 cut-off events. For 2216/2300 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 102151 event pairs, 362 based on Foata normal form. 76/8480 useless extension candidates. Maximal degree in co-relation 13443. Up to 808 conditions per place. [2022-11-16 11:46:30,216 INFO L137 encePairwiseOnDemand]: 341/350 looper letters, 118 selfloop transitions, 11 changer transitions 4/403 dead transitions. [2022-11-16 11:46:30,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 403 transitions, 1449 flow [2022-11-16 11:46:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:46:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:46:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1963 transitions. [2022-11-16 11:46:30,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8012244897959183 [2022-11-16 11:46:30,220 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1963 transitions. [2022-11-16 11:46:30,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1963 transitions. [2022-11-16 11:46:30,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:30,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1963 transitions. [2022-11-16 11:46:30,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 280.42857142857144) internal successors, (1963), 7 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 11:46:30,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states 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 11:46:30,231 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states 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 11:46:30,231 INFO L175 Difference]: Start difference. First operand has 365 places, 336 transitions, 927 flow. Second operand 7 states and 1963 transitions. [2022-11-16 11:46:30,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 403 transitions, 1449 flow [2022-11-16 11:46:30,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 403 transitions, 1401 flow, removed 8 selfloop flow, removed 8 redundant places. [2022-11-16 11:46:30,245 INFO L231 Difference]: Finished difference. Result has 362 places, 345 transitions, 977 flow [2022-11-16 11:46:30,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=977, PETRI_PLACES=362, PETRI_TRANSITIONS=345} [2022-11-16 11:46:30,247 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 44 predicate places. [2022-11-16 11:46:30,247 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 345 transitions, 977 flow [2022-11-16 11:46:30,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 11:46:30,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:30,249 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:30,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:46:30,249 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:46:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:30,250 INFO L85 PathProgramCache]: Analyzing trace with hash -433798143, now seen corresponding path program 2 times [2022-11-16 11:46:30,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:30,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581622564] [2022-11-16 11:46:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:30,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:46:30,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:30,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581622564] [2022-11-16 11:46:30,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581622564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:30,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545347045] [2022-11-16 11:46:30,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:46:30,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:30,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:30,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:30,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:46:31,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:46:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:31,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:46:31,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:31,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:46:31,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545347045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:46:31,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:46:31,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 20 [2022-11-16 11:46:31,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224726505] [2022-11-16 11:46:31,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:31,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:46:31,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:46:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:46:31,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 350 [2022-11-16 11:46:31,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 345 transitions, 977 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 11:46:31,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:31,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 350 [2022-11-16 11:46:31,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:33,708 INFO L130 PetriNetUnfolder]: 1879/13372 cut-off events. [2022-11-16 11:46:33,708 INFO L131 PetriNetUnfolder]: For 4683/5312 co-relation queries the response was YES. [2022-11-16 11:46:33,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20281 conditions, 13372 events. 1879/13372 cut-off events. For 4683/5312 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 162222 event pairs, 356 based on Foata normal form. 134/12320 useless extension candidates. Maximal degree in co-relation 20262. Up to 1223 conditions per place. [2022-11-16 11:46:33,825 INFO L137 encePairwiseOnDemand]: 341/350 looper letters, 119 selfloop transitions, 18 changer transitions 4/411 dead transitions. [2022-11-16 11:46:33,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 411 transitions, 1553 flow [2022-11-16 11:46:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:46:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:46:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1964 transitions. [2022-11-16 11:46:33,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8016326530612244 [2022-11-16 11:46:33,829 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1964 transitions. [2022-11-16 11:46:33,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1964 transitions. [2022-11-16 11:46:33,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:33,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1964 transitions. [2022-11-16 11:46:33,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 280.57142857142856) internal successors, (1964), 7 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states 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 11:46:33,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states 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 11:46:33,837 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states 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 11:46:33,837 INFO L175 Difference]: Start difference. First operand has 362 places, 345 transitions, 977 flow. Second operand 7 states and 1964 transitions. [2022-11-16 11:46:33,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 411 transitions, 1553 flow [2022-11-16 11:46:34,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 411 transitions, 1533 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-16 11:46:34,055 INFO L231 Difference]: Finished difference. Result has 368 places, 355 transitions, 1115 flow [2022-11-16 11:46:34,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1115, PETRI_PLACES=368, PETRI_TRANSITIONS=355} [2022-11-16 11:46:34,056 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 50 predicate places. [2022-11-16 11:46:34,056 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 355 transitions, 1115 flow [2022-11-16 11:46:34,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 11:46:34,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:34,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:34,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:34,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:34,258 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:46:34,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash 202160813, now seen corresponding path program 3 times [2022-11-16 11:46:34,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:34,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139966106] [2022-11-16 11:46:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:34,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:46:34,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:34,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139966106] [2022-11-16 11:46:34,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139966106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:46:34,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:46:34,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:46:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195807797] [2022-11-16 11:46:34,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:34,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:46:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:46:34,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:46:34,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 350 [2022-11-16 11:46:34,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 355 transitions, 1115 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 11:46:34,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:34,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 350 [2022-11-16 11:46:34,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:37,703 INFO L130 PetriNetUnfolder]: 2221/15430 cut-off events. [2022-11-16 11:46:37,703 INFO L131 PetriNetUnfolder]: For 9116/10322 co-relation queries the response was YES. [2022-11-16 11:46:37,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24570 conditions, 15430 events. 2221/15430 cut-off events. For 9116/10322 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 192122 event pairs, 398 based on Foata normal form. 211/14193 useless extension candidates. Maximal degree in co-relation 24548. Up to 1456 conditions per place. [2022-11-16 11:46:37,870 INFO L137 encePairwiseOnDemand]: 341/350 looper letters, 125 selfloop transitions, 25 changer transitions 4/424 dead transitions. [2022-11-16 11:46:37,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 424 transitions, 1801 flow [2022-11-16 11:46:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:46:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:46:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1961 transitions. [2022-11-16 11:46:37,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8004081632653062 [2022-11-16 11:46:37,875 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1961 transitions. [2022-11-16 11:46:37,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1961 transitions. [2022-11-16 11:46:37,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:37,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1961 transitions. [2022-11-16 11:46:37,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 280.14285714285717) internal successors, (1961), 7 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 11:46:37,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states 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 11:46:37,885 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 350.0) internal successors, (2800), 8 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states 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 11:46:37,886 INFO L175 Difference]: Start difference. First operand has 368 places, 355 transitions, 1115 flow. Second operand 7 states and 1961 transitions. [2022-11-16 11:46:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 424 transitions, 1801 flow [2022-11-16 11:46:37,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 424 transitions, 1772 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-11-16 11:46:37,913 INFO L231 Difference]: Finished difference. Result has 374 places, 369 transitions, 1345 flow [2022-11-16 11:46:37,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1345, PETRI_PLACES=374, PETRI_TRANSITIONS=369} [2022-11-16 11:46:37,914 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 56 predicate places. [2022-11-16 11:46:37,914 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 369 transitions, 1345 flow [2022-11-16 11:46:37,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states 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 11:46:37,915 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:37,915 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:37,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:46:37,916 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:46:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1694810067, now seen corresponding path program 4 times [2022-11-16 11:46:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:37,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30185813] [2022-11-16 11:46:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:37,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:46:38,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30185813] [2022-11-16 11:46:38,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30185813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:38,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468567133] [2022-11-16 11:46:38,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:46:38,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:38,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:38,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:38,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:46:39,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:46:39,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:46:39,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:46:39,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:46:40,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468567133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:40,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:40,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-11-16 11:46:40,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013407849] [2022-11-16 11:46:40,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:46:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:40,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:46:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:46:40,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 350 [2022-11-16 11:46:40,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 369 transitions, 1345 flow. Second operand has 37 states, 37 states have (on average 240.40540540540542) internal successors, (8895), 37 states have internal predecessors, (8895), 0 states have call successors, (0), 0 states 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 11:46:40,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:40,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 350 [2022-11-16 11:46:40,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:47:00,572 INFO L130 PetriNetUnfolder]: 9089/58792 cut-off events. [2022-11-16 11:47:00,572 INFO L131 PetriNetUnfolder]: For 58767/64826 co-relation queries the response was YES. [2022-11-16 11:47:01,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101019 conditions, 58792 events. 9089/58792 cut-off events. For 58767/64826 co-relation queries the response was YES. Maximal size of possible extension queue 1451. Compared 933844 event pairs, 2538 based on Foata normal form. 1156/54718 useless extension candidates. Maximal degree in co-relation 100994. Up to 2529 conditions per place. [2022-11-16 11:47:01,308 INFO L137 encePairwiseOnDemand]: 311/350 looper letters, 615 selfloop transitions, 204 changer transitions 69/1114 dead transitions. [2022-11-16 11:47:01,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1114 transitions, 7899 flow [2022-11-16 11:47:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-16 11:47:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-11-16 11:47:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 29048 transitions. [2022-11-16 11:47:01,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6859031877213695 [2022-11-16 11:47:01,340 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 29048 transitions. [2022-11-16 11:47:01,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 29048 transitions. [2022-11-16 11:47:01,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:47:01,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 29048 transitions. [2022-11-16 11:47:01,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 240.06611570247935) internal successors, (29048), 121 states have internal predecessors, (29048), 0 states have call successors, (0), 0 states 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 11:47:01,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 350.0) internal successors, (42700), 122 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states 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 11:47:01,484 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 350.0) internal successors, (42700), 122 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states 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 11:47:01,485 INFO L175 Difference]: Start difference. First operand has 374 places, 369 transitions, 1345 flow. Second operand 121 states and 29048 transitions. [2022-11-16 11:47:01,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1114 transitions, 7899 flow [2022-11-16 11:47:01,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 1114 transitions, 7623 flow, removed 75 selfloop flow, removed 3 redundant places. [2022-11-16 11:47:01,636 INFO L231 Difference]: Finished difference. Result has 543 places, 555 transitions, 3757 flow [2022-11-16 11:47:01,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=3757, PETRI_PLACES=543, PETRI_TRANSITIONS=555} [2022-11-16 11:47:01,638 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 225 predicate places. [2022-11-16 11:47:01,638 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 555 transitions, 3757 flow [2022-11-16 11:47:01,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 240.40540540540542) internal successors, (8895), 37 states have internal predecessors, (8895), 0 states have call successors, (0), 0 states 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 11:47:01,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:47:01,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:47:01,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 11:47:01,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:47:01,848 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:47:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1146166832, now seen corresponding path program 1 times [2022-11-16 11:47:01,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:01,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274828654] [2022-11-16 11:47:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:01,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:47:02,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:02,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274828654] [2022-11-16 11:47:02,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274828654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:47:02,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:47:02,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:47:02,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312821989] [2022-11-16 11:47:02,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:47:02,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:47:02,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:02,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:47:02,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:47:02,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 350 [2022-11-16 11:47:02,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 555 transitions, 3757 flow. Second operand has 7 states, 7 states have (on average 280.0) internal successors, (1960), 7 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states 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 11:47:02,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:47:02,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 350 [2022-11-16 11:47:02,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:47:12,580 INFO L130 PetriNetUnfolder]: 4386/31158 cut-off events. [2022-11-16 11:47:12,581 INFO L131 PetriNetUnfolder]: For 48224/49883 co-relation queries the response was YES. [2022-11-16 11:47:13,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56039 conditions, 31158 events. 4386/31158 cut-off events. For 48224/49883 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 448119 event pairs, 2611 based on Foata normal form. 430/28979 useless extension candidates. Maximal degree in co-relation 55962. Up to 6410 conditions per place. [2022-11-16 11:47:13,380 INFO L137 encePairwiseOnDemand]: 339/350 looper letters, 133 selfloop transitions, 18 changer transitions 57/554 dead transitions. [2022-11-16 11:47:13,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 554 transitions, 3928 flow [2022-11-16 11:47:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:47:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:47:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2822 transitions. [2022-11-16 11:47:13,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8062857142857143 [2022-11-16 11:47:13,384 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2822 transitions. [2022-11-16 11:47:13,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2822 transitions. [2022-11-16 11:47:13,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:47:13,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2822 transitions. [2022-11-16 11:47:13,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 282.2) internal successors, (2822), 10 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states 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 11:47:13,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 350.0) internal successors, (3850), 11 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states 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 11:47:13,395 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 350.0) internal successors, (3850), 11 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states 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 11:47:13,395 INFO L175 Difference]: Start difference. First operand has 543 places, 555 transitions, 3757 flow. Second operand 10 states and 2822 transitions. [2022-11-16 11:47:13,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 554 transitions, 3928 flow [2022-11-16 11:47:13,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 554 transitions, 3662 flow, removed 107 selfloop flow, removed 35 redundant places. [2022-11-16 11:47:13,634 INFO L231 Difference]: Finished difference. Result has 495 places, 496 transitions, 2899 flow [2022-11-16 11:47:13,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2899, PETRI_PLACES=495, PETRI_TRANSITIONS=496} [2022-11-16 11:47:13,635 INFO L288 CegarLoopForPetriNet]: 318 programPoint places, 177 predicate places. [2022-11-16 11:47:13,636 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 496 transitions, 2899 flow [2022-11-16 11:47:13,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 280.0) internal successors, (1960), 7 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states 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 11:47:13,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:47:13,637 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:47:13,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:47:13,637 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-16 11:47:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:13,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2001959175, now seen corresponding path program 5 times [2022-11-16 11:47:13,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:13,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698164122] [2022-11-16 11:47:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:13,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:47:14,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:14,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698164122] [2022-11-16 11:47:14,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698164122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:14,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277210785] [2022-11-16 11:47:14,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:47:14,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:14,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:14,574 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:14,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d9c723c-b127-41e2-8db5-9d01d78fe111/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:47:14,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:47:14,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:14,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:47:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:47:15,541 INFO L328 TraceCheckSpWp]: Computing backward predicates...